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What is EDFA Optical Amplifier?
 
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http://www.fiberoptics4sale.com/wordpress/ EDFA stands for Erbium Doped Fiber Amplifier and it is one type of many different optical amplifiers. Optical amplifiers amplify an optical signal directly, without the need to first convert it to an electrical signal. This process is significantly cheaper and started a fiber optic revolution. Put simply, EDFA stands for Erbium Doped Fiber Amplifier and it is one type of many different optical amplifiers. When an optical signal is transmitted over a long distance, such as from New York to San Francisco, the optical signal has to be amplified many times in between. This is because of signal loss from fiber attenuation, connector losses, fiber splice losses, etc. Before optical amplifier was invented, the optical signal had to be first converted to electrical signal, amplified, and then converted back to optical signal again. This process was very complicated and expensive. Then optical amplifiers such as EDFA were invented. Optical amplifiers amplify an optical signal directly, without the need to first convert it to an electrical signal. This process is significantly cheaper and started a fiber optic revolution. Now let's take a close look at how EDFA works. The top left picture shows a simple diagram of how EDFA works. The optical signal, such as a 1550nm signal, enters an EDFA from the input. The 1550nm signal is combined with a 980nm pump laser with a WDM device. The signal and the pump laser pass through a length of fiber doped with Erbium ions. The 1550nm signal is amplified through interaction with the doping Erbium ions. This Erbium ion interaction process is shown at the right picture. The 980nm pump laser excites Erbium ions from lower energy level 1 into a higher energy level 3. From level 3, the Erbium ions rapid decay to level 2. From Level 2, the Erbium ions interacts with 1550nm signal and jumps back to lower energy level 1. In this process, it emits a 1550nm photon. This process is called Stimulated Emission. Actually EDFA has an amplification window. It is the range of optical wavelengths for which the amplifier yields a usable gain. This wavelength range is determined by the properties of the dopant ions, the glass structure of the optical fiber, and the wavelength and power of the pump laser. The lower left picture shows a more detailed schematic diagram of EDFA. It is composed of isolators, WDM, Erbium Doped Fiber, 980nm pump laser, and more.
Views: 45336 FOSCO CONNECT
The EDFA - how it was developed.
 
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A look back at how the EDFA (Erbium Doped Fibre Amplifier) became a pivotal development in the technology underpinning the internet. Interviews with Professor Sir David Payne, Director of the ORC, Dr Emmanuel Desurvire, Thales Research and Dr Randy Giles, Bell Labs.
EDFA basics
 
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Views: 3737 Cable Guy
Engineering Challenge- Erbium Doped Amplifiers, UCL
 
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A short video explaining the principle of EDFAs. https://drive.google.com/file/d/0B7EkUedY44XKYWU1b1dpblFOelE/view?usp=sharing
Views: 948 K Ghosh
Mod-01 Lec-27 EDFA
 
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Advanced Optical Communication by Prof. R.K. Shevgaonkar,Department of Electronics & Communication Engineering ,IIT Bombay.For more details on NPTEL visit http://nptel.ac.in
Views: 13063 nptelhrd
Optical amplifier
 
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An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics. There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers, electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 1797 Audiopedia
Mod-01 Lec-26 Wavelength Division Multiplexed Systems
 
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Advanced Optical Communication by Prof. R.K. Shevgaonkar,Department of Electronics & Communication Engineering ,IIT Bombay.For more details on NPTEL visit http://nptel.ac.in
Views: 19307 nptelhrd
What is OPTICAL AMPLIFIER? What does OPTICAL AMPLIFIER mean? OPTICAL AMPLIFIER meaning
 
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What is OPTICAL AMPLIFIER? What does OPTICAL AMPLIFIER mean? OPTICAL AMPLIFIER meaning - OPTICAL AMPLIFIER definition - OPTICAL AMPLIFIER explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics. There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification. The adoption of high power fiber lasers as an industrial material processing tool has been ongoing for several years and is now expanding into other markets including the medical and scientific markets. One key enhancement enabling penetration into the scientific market has been the improvements in high finesse fiber amplifiers, which are now capable of delivering single frequency linewidths (greater than 5 kHz) together with excellent beam quality and stable linearly polarized output. Systems meeting these specifications, have steadily progressed in the last few years from a few Watts of output power, initially to the 10s of Watts and now into the 100s of Watts power level. This power scaling has been achieved with developments in the fiber technology, such as the adoption of stimulated brillouin scattering (SBS) suppression/mitigation techniques within the fiber, along with improvements in the overall amplifier design. The latest generation of high finesse, high power fiber amplifiers now deliver power levels exceeding what is available from commercial solid-state single frequency sources and are opening up new scientific applications as a result of the higher power levels and stable optimized performance.
Views: 2452 The Audiopedia
Optical amplifiers
 
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Semiconductor optical amplifiers
Views: 1627 Debaraj Kaushik
Fiber Optics #03 Salient Features of Optical Fiber: ray theory of light, graded-index fibers
 
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Fiber Optics #03 Salient Features of Optical Fiber: ray theory of light, numerical aperture of the fiber, graded-index fibers. Welcome to the 3rd lecture of fiber optics. In this lecture, ray theory of light guidance is explained and numerical aperture of the fiber is defined. The lecture also touches upon graded-index fibers. Topics covered are: Structure of the fiber (step-index fiber) Need for studying light guidance Ray theory of light guidance Meridional TayS Skew rays Light gathering Capacity of the fiber Numerical aperture Graded-index fibers Ray paths in graded-inde fibers Fiber bundles Fiber Optics/ Optical Fiber Lectures from IIT for GATE, IES, ESE @ https://goo.gl/ngcoSi
Views: 462 XoviabECE
What Is Amplified Spontaneous Emission Noise?
 
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Principal investigator adams, professor m2014 oct 15;39(20) 5925 8. Erbium doped fiber amplifier (edfa)over the past few years optical abstract. Optical steganography based on amplified spontaneous emission noise. Glossary of optical fiber the properties amplified spontaneous emission noise in saturated on modeling ase (amplified or noise) power wavelength converters and amplifiers steganography based few mode raman osa. Note it is just a cosmetic issue and not traffic impacted. Role of amplified spontaneous emission in optical free space theoretical evaluation combined nonlinearities and. Under the undepleted pump approximation, equalization of modal gain also ensures osnr. A background noise mechanism common to all types of erbium doped fiber amplifiers (edfas). The noise figure of a laser amplifier can be considered to limited by ase. Spie 4833, applications wdm optical steganography based on amplified spontaneous emission noisetait, mprucnal, noise, optics letters, vol20, 5925 5928, 2014. Amplified spontaneous emission (ase). Title amplified spontaneous emission and noise in optical amplifiers lasers. Emission wikipediaamplified spontaneous emission rp photonics consulting gmbh. Effect of amplified spontaneous emission noise on the phase wdm optical steganography based power in ijser. Approximate expres sions for the ase and rbs, as well amplifier noise figure are derived, based on approximate analytical expressions (2003) copyright society of photo optical instrumentation engineers (spie). It contributes to the noise figure of edfa which causes loss signal ratio (snr). Note that for quasi three level gain media this ase effect is stronger than 1 rare earth ions in fibers, 2 and pump absorption, 3 self consistent solutions the steady state, 4 amplified spontaneous emission, 5 forward backward pumping, 6 double clad fibers high power operation, 7 fiber amplifiers nanosecond pulses, 8 ultrashort 9 noise of emission (ase). Wu b, tait an, chang mp, prucnal pr. This modal allows the prediction of mode dependent osnrs in saturated pump regime we propose and experimentally demonstrate a wavelength division multiplexed (wdm) optical stealth transmission system carried by amplified spontaneous emission (ase) noise. Wdm optical steganography based on amplified spontaneous emission and rayleigh osa publishing. Verstrkte spontane emission, auch superlumineszenz oder superstrahlung bzw. The tnc is wrongly reporting ase (amplified the amplified spontaneous emission of a saturated semiconductor laser amplifier studied analytically and experimentally for co as well counterpropag epsrc reference gr r50943 01. The stealth signal is hidden in both time and frequency domains by using ase noise as the carrier. Wdm optical steganography based on amplified spontaneous emission noise. The theoretical results are compared to one another having 17 oct 2015 introduction this document describes the issue of unused waves being monitored in optical side power monitoring c
Views: 180 Roselyn Wnuk Tipz
Erbium Doped Fiber Amplifier - EDFA
 
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Este vídeo mostra uma animação do funcionamento do amplificador ótico EDFA em português. Vídeo original: https://goo.gl/X2FYYu
What Is A EDFA Optical Amplifier?
 
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Introduction to erbium doped fiber amplifier (edfa) optic edfa basic concepts optiwave. Raman amplifier emcore is a pioneer of innovative rf over fiber solutions for satellite communications with long history designing and configuring systems tailored to specific customer requirements. Increasing the power level at end of transmission line according to receiver sensitivity. According to section rs optical transmission systems are either attenuation or dispersion limited. In the shown case, active fiber is pumped with light from two laser diodes (bidirectional pumping), although unidirectional pumping in forward or 3 jun 2016 optical communication network, signal travels through fibers every large distances without significant attenuation. Inline amplifier, to compensate the attenuation of link. Arris erbium doped fiber amplifier (edfa) modules for the arris chp headend optics platform are designed to increase signal transmission distance, making them ideal optical amplification solutions long links, redundant rings, blast and split, other applications. Osd shows the basic characterization of erbium doped fiber amplifier (edfa). Note that the saturated overview. Edfa erbium doped fiber amplifier webopedia. There is usually an isolator placed at the output to prevent reflections returning from attached fiber. Edfa optical amplifiers adtran. A typical setup of a simple erbium doped fiber amplifier (edfa) is shown in figure 1. Emcore's latest innovations are incorporated into the optiva family of snmp managed transmitters, receivers, optical amplifiers, rf emcore high performance catv fiber amplifiers optimized for superior output power stability and exceptionally low noise figures demanded by applications erbium doped amplifier (edfa) is an repeater device, used to boost intensity signals being carried through a optic communications system (edfa),optical edfa signal designed amplify in networks dwdm. Shortly after their commercialization in the early 1990's, erbium doped fiber amplifiers (edfa's) became a key enabling technology for optical communication networks, and have since comprised vast majority of all deployed field. Saturated output power (dbm) is the maximum pout from an optical amplifier when within amplification medium reaches saturation psat. The em316ea family of c band edfa optical amplifiers is part the fiber driver multi service platform 1 introduction. Emcore 1550 nm catv optical amplification edfa. Erbium doped fiber amplifiers (edfa) thorlabsedfa bayspecarris. Optic amplifiers wholesale suppliers onlinewhat is edfa optical amplifier? Youtube. However, when it comes to the distance up hundreds of kilometers, amplify signal during transit becomes rather essential. Optical amplifiers edfa and raman pan dacom direkt. Thus all of the additional signal power is guided in same fiber mode as incoming. Erbium doped fiber amplifiers rp photonics consulting gmbh. Fully scalable, edfas are also total access 5000 5006 optical extension module
Views: 207 Roselyn Wnuk Tipz
What is Double-Clad Fiber?
 
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http://www.fiberoptics4sale.com/wordpress/what-are-rare-earth-doped-fibers/ http://www.fiberoptics4sale.com In this video, I will explain what is Double-Clad Fiber. So let's get started. Here is a comparison between regular optical fiber and double-clad fiber. Regular fibers have a core at the center and a cladding layer on the outside. The light signal is confined and only travels inside the core. On the other hand, double-clad fibers also have a core at the center, but they have two layers of cladding, an inner cladding, and an outer cladding. So why is that? What are the two cladding layers for? Double-Clad fibers are usually designed for fiber lasers and fiber amplifiers. Here is how it works. The right side picture shows the refractive indices of the three layers. The core has the highest refractive index, the inner cladding has a slightly lower refractive index, and the outer cladding has the lowest refractive index. As shown in the left side picture, the signal light is confined inside the core by the core and inner cladding, just as regular fibers. While the pump light is coupled into and confined within the inner cladding by the inner cladding and outer cladding, in the same total internal reflection principle just as the signal light is confined within the core. The core is doped with laser active rare-earth ions such as Erbium, Ytterbium, etc. So the pump light zigzags inside the inner cladding, and interact with the Erbium or Ytterbium ions and the signal light in the core. The doped core gradually absorbs the pump light as it propagates in the inner cladding by the stimulated emission process, so that the pump light energy is transferred into signal light energy and thus the signal light is amplified. This pumping method is called cladding pumping, as opposed to the conventional core pumping, in which the pump light is coupled into the small core. Conventional core pumping usually works fine for low power situations, but cladding pumping can produce continuous power up to several kilowatts, while the signal light in the core still maintains very high beam quality. The shape of the cladding is very important, especially when the core diameter is small compared to the size of the inner cladding. There are a variety of different designs of double-clad fibers. This picture shows the fiber cross-sections for the most important design types. The simplest kind of design has a circular pump cladding and a centered core. This is relatively easy to make and use, but this is the worst design for a fiber laser; in this case, many modes of the pump light in the inner cladding miss the core and hence cannot be used to pump it. This means most of the rays of the pump light do not pass through the core, and hence cannot pump it.  As a result, the gain and power efficiency are compromised. This problem can be avoided by using a modified design with a lower symmetry. Examples are designs with an off-centered core or a non-circular inner cladding such as D-shaped, elliptical, or rectangular inner cladding. Double-Clad fibers have found extensive applications in high power fiber lasers and fiber amplifiers. Some dispersion compensating fibers also use double-clad design. So there you have it. Please leave your comment below if you'd like to see other topics. Don't forget to visit fo4sale.com for more free fiber optic tutorials. I will see you in the next video!
Views: 3983 FOSCO CONNECT
All you need to know about Raman Optical Amplification
 
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By Mike Harrop, Application Engineering and CTO Office, EXFO
Tutorial – EDFAs – RF Over Fiber Design Tool
 
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The RF Over Fiber Design Tool facilitates optical system design in the RF Over Fiber (i.e., Radio Over Fiber) optical link. The application home page is http://www.jencotech.com/rf-over-fiber-design-tool.php Please visit for access to the application and additional tutorials. This tutorial focuses on EDFA (erbium-doped fiber amplifier) modelling within Emcore’s Optiva platform. The most basic fiber optic link consists of an optical transmitter, an optical receiver, with passive and fiber attenuation between. To these, a fiber amplifier (EDFA) and/or CWDM/DWDM (wavelength division multiplexing) may be added if necessary. Applications of RF Over Fiber include fiber to the antenna, etc. RF frequencies modelled range from 50 MHz to 40 GHz. This includes the satcom bands (i.e., L-Band, S-Band, C-Band, X-Band, Ku-Band, K-band, Ka-Band).
Views: 1652 Jenco Technologies
Optisystem DWDM
 
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Views: 3075 josue guillen
Mode Filtered Fiber Amplifier
 
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A breakthrough technology for fabricating practical, high-power, high-beam-quality laser sources that are compact, rugged, and extremely efficient. 2007 R&D 100 winner (SAND2007-1475P)
LASER doide, Fiber splices, EDFA ,Quantum well LASERs and photodetector noises by Mrs.D.Padmapriya
 
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This video clearly explains about the structure and types of LASER diode, types of fiber splices, Erbium doped Fiber Amplifier and various photodetector noises
Phase Sensitive Optical Amplifier Using PPLN Waveguides
 
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NTT Photonics Laboratories (2013)
Views: 606 NTT SCL
The Semiconductor (Laser) Amplifier
 
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Semiconductor Optoelectronics by Prof. M. R. Shenoy, Department of Physics, IIT Delhi. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 8610 nptelhrd
What is Dispersion-Shifted Fiber (DSF)? - FO4SALE.COM
 
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http://www.fiberoptics4sale.com/p/Corning-250um-Bare-Fiber/SMFLF.html In order to understand dispersion shifted fiber, we have to know what is chromatic dispersion. Let's look at this graph first. Most glass optical fibers are made of fused silica and this graph shows that the refractive index of silica changes as a function of wavelength, which means that different wavelengths travel at different speeds in silica. Because of this speed difference, in a light pulse, some light colors travel faster, and some light colors travel slower, this makes the pulse to spread out in time, which is called pulse spreading. Chromatic dispersion measures this pulse spreading at difference wavelengths, as you can see the second curve on this graph. Chromatic dispersion has a unit of ps/nm-km. So the number +20 at 1.6um means that a light pulse which has a wavelength range of 1600nm to 1601nm will be 20 ps wider in time after traveling 1km of fiber. However, the total chromatic dispersion is actually the sum of two dispersions, the material dispersion as we saw in the previous graph, and the wavelength dispersion. As we learned from the last graph, material dispersion is determined by the material, and it can not be modified by fiber designs unless you change the material. However, the second dispersion, waveguide dispersion is caused by the distribution of light between core and cladding and it can be modified by using different fiber designs, such as changing the refractive index profiles and dimensions etc. This means we can use waveguide dispersion to offset material dispersion. This graph shows the material dispersion, waveguide dispersion and the total chromatic dispersion of a standard step-index single mode fiber, which is also called ITU-T G.652 fiber. SMF-28e+ fiber from Corning is one such fiber. After the offset, the total dispersion is 0 at 1310nm wavelength. This means a light pulse at 1310nm will have no pulse spreading problem. Standard step-index single mode fibers has 0 dispersion at 1310nm, but 1310nm is not the lowest loss point. Instead, the lowest attenuation point is at 1550nm and 1550nm has been widely used for long distance telecom networks. So in order to match this lowest attenuation point at 1550nm, engineers invented zero dispersion-shifted fibers in mid-1980s. They moved the waveguide dispersion even further down so the total chromatic dispersion is 0 at 1550nm. This fiber was first simply called dispersion-shifted fiber, but after the invention of non-zero dispersion-shifted fiber, which I will discuss in the next slide, these fibers are now called zero dispersion-shifted fibers. Zero means their dispersion is zero in the middle of the erbium-doped fiber amplifier band. Although this design worked well for single-channel systems, it proved unsuitable for WDM. When multiple optical channels pass through the same fiber at wavelengths where dispersion is very close to zero, they suffer from a type of crosstalk called four-wave mixing. The degradation is so severe that zero dispersion-shifted fiber cannot be used for dense-WDM systems. Zero dispersion-shifted fibers were installed in some systems, but never came into wide use and are no longer manufactured. And that is why engineers invented non-zero dispersion shifted fibers. The way to avoid four-wave mixing is to move the zero-dispersion wavelength outside of the wavelength band used for erbium-doped fiber amplifiers. The name Non-Zero comes from the fact that their dispersion is shifted to a value that is low -- but not zero -- in the 1550nm band of erbium-fiber amplifiers. This small dispersion is enough to keep signals at closely spaced wavelengths from staying in phase over long distances and causing serious crosstalk. This small dispersion can be provided by moving the zero-dispersion wavelength either shorter or longer than the erbium-fiber 1550nm band, as shown in this figure. For dense-WDM applications using erbium-doped fiber amplifiers, the current favorite is a zero-dispersion point at a wavelength of 1500nm or less. Dispersion-shifted fibers do this by using different refractive index profile designs. So they can adjust the amount of waveguide dispersion differently. These pictures show refractive index profile example of one zero dispersion-shifted fiber and one non-zero dispersion-shifted fiber. So there you have it. Please don't forget to visit http://www.fo4sale.com for more free fiber optic tutorials.
Views: 13438 FOSCO CONNECT
What is FLUORIDE GLASS? What does FLUORIDE GLASS mean? FLUORIDE GLASS meaning & explanation
 
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What is FLUORIDE GLASS? What does FLUORIDE GLASS mean? FLUORIDE GLASS meaning - FLUORIDE GLASS definition - FLUORIDE GLASS explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Fluoride glass is a class of non-oxide optical glasses composed of fluorides of various metals. Due to their low viscosity, it is very difficult to completely avoid the occurrence of any crystallization while processing it through the glass transition (or drawing the fiber from the melt). Thus, although heavy metal fluoride glasses (HMFG) exhibit very low optical attenuation, they are not only difficult to manufacture, but are quite fragile, and have poor resistance to moisture and other environmental attacks. Fluoride glasses' best attribute is that they lack the absorption band associated with the hydroxyl (OH) group (3200 – 3600 cm-1) which is present in nearly all oxide-based glasses. HMFGs were initially slated for optical fiber applications, because the intrinsic losses of a mid-IR fiber could, in principle, be lower than those of silica fibers, which are only transparent to wavelengths shorter than ~2?µm. Such low losses were never realized in practice, and the fragility and high cost of fluoride fibers made them less than ideal as primary candidates. Later, the utility of fluoride fibers for various other applications was discovered. These applications include mid-IR spectroscopy, fiber-optic sensors, thermometry, and imaging. Also, fluoride fibers can be used for guided lightwave transmission in media such as YAG (Yttrium aluminium garnet) lasers at 2.9?µm, as required for medical applications (e.g. ophthalmology and dentistry). An example of a heavy metal fluoride glass is the ZBLAN glass group, composed of zirconium, barium, lanthanum, aluminum, and sodium fluorides. These materials' main technological application is as optical waveguides in planar and fibre form. They are advantageous especially in mid infrared (2000-5000 nm) range. Some fluoride glasses are difficult to produce on Earth due to their rapid crystallization. The crystallization is slower in microgravity conditions due to reduced convection effects. Fluoride glass may also mean an oxide optical glass doped with zirconium tetrafluoride. A mix of fluoride glass and phosphate glass is fluorophosphate glass. Fluoride glasses based on zirconium fluoride are a class of fluorozirconate glasses. ZBLAN glasses belong to this group as well. Fluoride glasses based on aluminium fluoride are a class of fluoroaluminate glasses. Doping praseodymium in fluoride glass allows it to be used as a single mode fiber optical amplifier (PDFA see also EDFA). Optical elements made of calcium fluoride, namely of fluorite crystals, are used in some telephoto lenses, to correct chromatic aberration. They are however being replaced with various low-dispersion glasses, which have higher refractive indexes, better dimensional stability, and lower fragility.
Views: 101 The Audiopedia
Fiber Optics #09 Propagation in Infinitely Extended Dielectric
 
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Fiber Optics #09 Propagation in Infinitely Extended Dielectric, Wave Equiation, Solution of 1D Wave Equation, Solution of 3D Wave Equation, Transverse Waves, Polarization. Welcome to the 9th lecture of fiber optics. In this lecture, electromagnetic wave analysis of light propagation in an infinitely extended dielectric medium has been carried out.Electric and magnetic field associated with a light wave is explained in detail with examples. Topics covered are as follow: 01:30 Light Propagation in an Infinitely Extended Medium 05:25 Wave Equiation 08:40 Solution of 1D Wave Equation 21:44 Solution of 3D Wave Equation 25:43 Transverse Waves 30:24 Polarization 35:35 Electric & Magnetic Field Associated with a Light Beam Fiber Optics/ Optical Fiber Lectures from IIT for GATE, IES, ESE @ https://goo.gl/ngcoSi
Views: 162 XoviabECE
EDFA-WDM
 
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หลักการทำงานอุปกรณ์ EDFA-WDM
Views: 1865 Cdlc Training
Tutorial – RF Gain – RF Over Fiber Design Tool
 
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The RF Over Fiber Design Tool facilitates optical system design in the RF Over Fiber (i.e., Radio Over Fiber) optical link. The application home page is http://www.jencotech.com/rf-over-fiber-design-tool.php Please visit for access to the application and additional tutorials. This tutorial focuses on RF Gain modelling of Emcore’s Optiva platform. The most basic fiber optic link consists of an optical transmitter, an optical receiver, with passive and fiber attenuation between. To these, a fiber amplifier (EDFA) and/or CWDM/DWDM (wavelength division multiplexing) may be added if necessary. Applications of RF Over Fiber include fiber to the antenna, etc. RF frequencies modelled range from 50 MHz to 40 GHz. This includes the satcom bands (i.e., L-Band, S-Band, C-Band, X-Band, Ku-Band, K-band, Ka-Band).
Views: 942 Jenco Technologies
Video Interview with David Payne
 
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The EDFA was a key development in optical communications, fueling an explosion in bandwidth. Payne puts it in context, reviewing early developments and possibilities ahead. David Payne is Professor and Director of the Optoelectronics Research Centre at the University of Southampton (UK). His research career has spanned many diverse areas of photonics, from telecommunications and optical sensors to nanophotonics and optical materials. Of the many major advances developed by Payne's research group, the best known is the invention of the erbium-doped fibre amplifier. His current main research interest is high-power fiber lasers. The Institute of Electrical and Electronics Engineers (IEEE) awarded him the 2007 Photonics Award, and he has also received the UK Rank Prize for Optics and the prestigious US Tyndall Award. He is a Franklin Laureate (USA) and, most recently, an Eduard Rhein Laureate (Europe). Prof Payne is a Fellow of the Royal Society and of the Royal Academy of Engineering. In 2006 he was elected to the Russian Academy of Sciences, one of only 240 foreign members. In addition to his academic achievements, David is a leading University entrepreneur. He has been a finalist in the Ernst & Young Entrepreneur of the Year Awards and his activities have led to a photonics cluster of 9 companies surrounding the ORC, creating jobs and wealth in the local community. As a result, the University has benefited from 3 companies situated in the Chilworth Science Park, namely Sensa, Fibercore and Southampton Photonics Inc (SPI).
Views: 2257 SPIETV
Laser: Breaking the optical bandwidth record of stable pulsed lasers.
 
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Breaking the optical bandwidth record of stable pulsed lasers:technology, technology news, newtech. technology videos: https://youtu.be/RhL0AAt28wg Breaking the optical bandwidth record of stable pulsed lasers The Ultrafast Optical Processing Group at INRS (Institut national de la recherche scientifique) has redefined the limitations and constraints for ultra-fast pulsed lasers. As reported in Nature Photonics, researchers from the team of Prof. Roberto Morandotti have produced the first pulsed passively mode-locked nanosecond laser, with a record-low and transform-limited spectral width of 105 MHz -- more than one hundred times lower than any mode-locked laser to date. With a compact architecture, modest power requirements, and the unique ability to resolve the full laser spectrum in the radio frequency (RF) domain, the laser paves the way towards full on-chip integration for novel sensing and spectroscopy implementations. Lasers emitting intense light-pulse trains have enabled the observation of numerous phenomena in many different research disciplines, and are the basis of state-of-the-art experiments in modern physics, chemistry, biology, and astronomy. However, high pulse intensities with low repetition rates come at the expense of mediocre noise properties. This is where passively mode-locked laser systems come in: They are the optimal choice for generating low-noise optical pulse trains. Such systems have, for example, made it possible to create stable optical frequency references for metrology (Nobel Prize, 2005) as well as intense ultra-short pulses (i.e., single-cycle pulses in the attosecond regime) for the study of high-intensity light-matter interactions. While many mode-locking techniques have been demonstrated, mainly aimed at creating increasingly shorter pulses with broader spectra, little progress has been achieved so far in tackling the opposite problem: the generation of stable nanosecond narrow-bandwidth pulsed sources. In their latest publication, the INRS research team presents a novel laser architecture that capitalizes on recent advances in nonlinear micro-cavity optics, pushing the boundaries further. Specifically, they exploit the narrowband filter characteristic of integrated microring resonators which, in addition to enabling high nonlinear phase shifts, make it possible to generate nanosecond pulses though mode-locking. "The pulsed laser output generated has a spectral bandwidth so narrow it is inaccessible with state-of-the-art optical spectrum analyzers," says Michael Kues, postdoctoral fellow and principal author of the study. To characterize the laser's bandwidth, the researchers instead used a coherent optical beating technique. The record-low laser bandwidth made it possible, for the first time, to measure the full spectral characteristics of a mode-locked laser in the RF domain using widely available RF electronics only and confirming, in turn, the laser's strong temporal coherence. Such stable narrow-bandwidth nanosecond pulsed sources are desirable for many sensing and microscopy applications, as well as for the efficient excitation of atoms and molecules (typically featuring narrow excitation bandwidths). From a fundamental perspective, the low and tractable number of optical laser modes, combined with the RF-accessibility of the associated spectrum, make the team's newly developed laser highly conducive to further study of both nonlinear mode coupling and complex mode-locking regimes. According to Science Daily. Thank you for watching! Don't forget to like this video, and subscribe for the next video. #researchsciences #investigation #Scientists
Views: 86 21 News
Mod-01 Lec-37 Raman Amplifier
 
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Advanced Optical Communication by Prof. R.K. Shevgaonkar,Department of Electronics & Communication Engineering ,IIT Bombay.For more details on NPTEL visit http://nptel.ac.in
Views: 9103 nptelhrd
Detecting R=100nm Single Gold Nanoparticles with WGM microresonator- mode splitting
 
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Each particle binding causes a change in the mode splitting spectrum of the whispering-gallery-mode microtoroid-fiber taper system, enabling the detection and sizing of single nanoparticles. This research was done at Micro/Nano Photonics Lab, Washington University in St. Louis Visit my website at: JiangangZhu.org
Views: 453 JiangangZhu
Er:Yb:Glass rods - Er: Yb: Glass (Phosphate Glass) sales@dmphotonics.com
 
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Er:Yb:Glass rods [email protected] New in production! Er:Glass Laser Rods Material : Er: Yb: Glass (Phosphate Glass) Doping Concentration : Yb^3+ : 1.3 x 10^21 ions/ cm^3 ; Er^3+ : 10^19 ions/ cm^3 (Without Chromium doping) Dimension : Dia = 2.5 ±0.1mm ; L = 35 ±0.5mm Surface Quality : 10:5 (Scratch: dig) Parallelism : better than 30 arc sec Perpendicularity : 5 arc minutes (each face) Wave front distortion : lambda /10 @ 632.8nm dn/dT : -3.6x10^-6 / Deg C Barrel finish: Ground End surface coating: AR(R less than 0.2%) @ 1540 nm Clear Aperture : more than 95% of diameter Damage Threshold : 15 J/cm^2 for 10ns. Er: Doped Glass Erbium-doped glass lasers operated near by 1 5 mm wavelength are helpful for medicine and biology optical communication and eye-safe range finder systems. Erbium and ytterbium co-doped phosphate glass has a broad application because of the excellent properties. It is the best material for medical application where the need for eye protection may be difficult to manage or diminish or hinder essential visual observation. Recently it is used in optical fiber communication instead of EDFA for its more super plus. We can also produce erbium laser glass with varios ion doping according to your requirement. Sample specs: Er:Yb:Glass 1% Er: 20% Yb, Dia.3mm, Length: 14mm, Surface quality: 10/5 scr/dig, Flatness: 1/10 wave at 633nm, End faces parallelism: 20 arc sec, Lateral surface: polished, Coating: S1: HR at 1540nm (R 99.5%); S2: AR at 1540nm (R 0.2%) Er:Yb:Glass 0.6% Er: 20% Yb, Dia.3mm, Length: 14mm, Surface quality: 10/5 scr/dig, Flatness: 1/10 wave at 633nm, End faces parallelism: 20 arc sec, Lateral surface: polished, Coating: S1: HR at 1540nm (R 99.5%); S2: AR at 1540nm (R 0.2%) Er:Yb:Glass 0.3% Er: 20% Yb, Dia.3mm, Length: 14mm, Surface quality: 10/5 scr/dig, Flatness: 1/10 wave at 633nm, End faces parallelism: 20 arc sec, Lateral surface: polished, Coating: S1: HR at 1540nm (R 99.5%); S2: AR at 1540nm (R 0.2%) more: http://www.dmphotonics.com/Er%20Glass%20Laser%20Rods/Er%20Yb%20Glass%20(Phosphate%20Glass)%20Laser%20Rods.htm Newsletter http://www.dmphotonics.com/Newsletter_DelMarPhotonics.htm Featured publications: [1] E. V. Zharikov et al., "Stimulated emission from Er3+ ions in yttrium aluminum garnet crystals at λ = 2.94 μm", Sov. J. Quantum Electron. 4, 1039 (1975) [2] A. J. Silversmith et al., "Green infrared-pumped erbium upconversion laser", Appl. Phys. Lett. 51, 1977 (1987) [3] M. E. Fermann et al., "Efficient operation of an Yb-sensitised Er fiber laser at 1.56 μm", Electron. Lett. 24, 1135 (1988) [4] F. Tong et al., "551 nm diode-laser-pumped upconversion laser", Electron. Lett. 25, 1389 (1989) [5] P. R. Morkel et al., "Theoretical modeling of erbium-doped fiber amplifiers with excited-state absorption", Opt. Lett. 14 (19), 1062 (1989) [6] T. Hebert et al., "Blue and green CW upconversion lasing in Er:YLiF4", Appl. Phys. Lett. 57, 1727 (1990) [7] W. J. Miniscalco, "Erbium-doped glasses for fiber amplifiers at 1500 nm", J. Lightwave Technol. 9 (2), 234 (1991) [8] W. L. Barnes et al., "Absorption and emission cross section of Er3+ doped silica fibers", IEEE J. Quantum Electron. 27 (4), 1004 (1991) [9] T. J. Whitley et al., "Upconversion pumped green lasing in erbium doped fluorozirconate fibre", Electron. Lett. 27 (20), 1785 (1991) [10] S. Konkanen et al., "High Er concentration phosphate glasses for planar waveguide amplifiers", Proc. SPIE 2996, 32 (1997) [11] G. G. Vienne et al., "Fabrication and characterization of Yb3+:Er3+ phosphosilicate fibers for lasers", J. Lightwave Technol. 16, 1990 (1998) [12] M. Pollnau and S. D. Jackson, "Erbium 3 μm fiber lasers", IEEE J. Sel. Top. Quantum Electron. 7 (1), 30 (2001) [13] J. F. Philipps et al., "Spectroscopic and lasing properties of Er3+:Yb3+-doped fluoride phosphate glasses", Appl. Phys. B 72, 399 (2001) [14] S. Tanabe, "Rare-earth-doped glasses for fiber amplifiers in broadband telecommunication", C. R. Chimie 5, 815 (2002) [15] G. C. Valley, "Modeling cladding-pumped Er/Yb fiber amplifiers", Opt. Fiber Technol. 7, 21 (2001) [16] H. Scheife et al., "Advances in up-conversion lasers based on Er3+ and Pr3+", Opt. Mater. 26 (4), 365 (2004) [17] D. Garbuzov et al., "110 W (0.9 J) pulsed power from resonantly diode-laser-pumped 1.6-μm Er:YAG laser", Appl. Phys. Lett. 87, 121101 (2005) [18] Y. E. Young et al., "Efficient 1645-nm Er:YAG laser", Opt. Lett. 29 (10), 1075 (2004) [19] J. O. White et al., "Resonant pumping and upconversion in 1.6 μm Er3+ lasers", J. Opt. Soc. Am. B 24 (9), 2454 (2007)
Views: 34 delmarphotonics
Fiber Optic Transmitters Receivers Transceivers PIN 10GBASE SR 1200 Mx SNL
 
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Check best price and review at B00HKJ1RWY/?tag=bgfuxicy-20 Get a Fiber Optic Transmitters, Receivers, Transceivers PIN 10GBASE-SR 1200 Mx-SNL-I 10.5trnscvr. New! Discover more categories. Shop now Fiber Optic Transmitters, Receivers, Transceivers PIN 10GBASE-SR 1200 Mx-SNL-I 10.5trnscvr.
Views: 54 Hayden Hussain
How to check Optic fiber loss by Micro OTDR? | Fibershot Micro OTDR
 
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How to check Optic fiber loss by #Micro_OTDR? | #Fibershot Micro #OTDR In this video, you can learn how to use #Micro_OTDR and what multifunction can help you to work fast and easily. Here are different features are given: #OTDR - Full Function OTDR that also allows live fiber testing (1310/1490/1550) #LTDR - Can test faults in the copper cat-5/6 cables. #OPM - To checks optical signal level. #PON POWER METER - Can check OLT/ONU, Very Useful for internet providers. #VFL - Check Fiber Faults Visually. #Network Test - No Need of Laptop check internet speed & lan health. #Link Test - Can check PING to the Router/Gateway. # Line Test - Check Break/Shorting Point in the copper Cat-5/6 Cables. #Line Search - find under the wall or cable in the control room. @star_technologies OTDR is equivalent to about optical time domain reflectometer electronic. introducing a series of pulses that has been tested and pulled away from the ends of the fibers dispersed (rare muscle) on one side or reflecting fiber. Light setae scattered to the report itself. The fear here is the amount of time equivalent to an electronic control motions come out of consideration established through Zen. The length of the fiber in accordance with the pulsation of which at the time is measured by his strength he hurled it be an integral function. Maintaining a reliable fiber factory is also important to protect your critical applications. As a network administrator, it is important to understand how to get the most out of your investment in cable networks and how to quickly solve problems when this happens. Enhanced or fiber level 2 certification complements Tier 1 tests with the inclusion of an end-to-end OTDR optical time domain reflectometer. OTDR trace is a graphical signature of fiber attenuation with its length, which provides an overview of the performance of the connecting components (cable, connectors and splices) and the quality of the installation by inspection. OTDR tracks uniformity. The most advanced devices can provide easy-to-understand event maps and loss amounts for individual components, as well as links. OTDR tracing is used to identify individual events that often cannot be seen when performing loss / duration tests (level 1). The fiber test demonstrates that the performance and quality of the installation correspond to projects and guarantees for current and future applications. , Linking bi-directional fiber lines to test level 2 (OTDR) is required not only by industry standards and most manufacturers for warranty, it is also the only way to learn the actual total link loss. In fact, measuring the loss of connectors and fiber splitters, as well as the overall loss of links, depends on the direction of the test. #Star_Informatic Pvt. Ltd. Our Websites Professional's: www.star-technologies.co.in Fusion splicer: www.ffs9000.com Fibershot: www.fibershot.net Follow Us on Facebook: https://goo.gl/hnWD67 Twitter: https://goo.gl/hsYLsc LinkedIn: https://goo.gl/VLMeHW *--------------------------------*-------------------------------------*------------------------------* fiber optic cable, fiber, otdr, the optical time-domain reflectometer, optical fiber, how to test optic fiber, test and measurement, what is dB loss, how to check OFC, how does otdr work?, how does mini otdr works?, how to work on otdr, learn how does otdr work?, mini otdr, portable & Ergonomic design, reliable test results, accurate measurements, measurement, optic fiber losses, optic cable, fiber optic equipment #fiber_optic_cable, #fiber, #otdr, the #optical_time_domain_reflectometer, #optical_fiber, #how_to_test_optic_fiber, #test and #measurement, what is #dB_loss, how to check #OFC, how does otdr work?, how does mini otdr works?, how to work on otdr, learn how does otdr work?, mini otdr, portable & Ergonomic design, reliable test results, accurate #measurements, #measurement, optic #fiber #losses, optic cable, fiber optic #equipment fiber optic cable, otdr, how to test optic fiber, how to check OFC, how does otdr work?, how to work on otdr, learn how does otdr work?, micro otdr, fibershot otdr, buy otdr in india, optical time-domain reflectometer, how does mini otdr works, micro otdr
Views: 26315 Star Technologies
Cutting machine with Fiber Laser
 
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Cutting machine with Fiber Laser “Laser” is an acronym for light amplification by stimulated emission of radiation. A laser is created when the electrons in atoms in special glasses, crystals, or gases absorb energy from an electrical current or another laser and become “excited.” ... First, its light contains only one wavelength (one specific color). A fiber laser or fibre laser is a laser in which the active gain medium is an optical fiber doped with rare-earth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium, thulium and holmium. They are related to doped fiber amplifiers, which provide light amplification without lasing. When cutting stainless steel or aluminum, the laser beam simply melts the material, and high pressure nitrogen is used to blow the molten metal out of the kerf. On a CNC laser cutter, the laser cutting head is moved over the metal plate in the shape of the desired part, thus cutting the part out of the plate the laser can cut materials like wood, paper, cork, and some kinds of plastics. Etching can be done on almost anything, wood, cardboard, aluminum, stainless steel, plastic, marble, stone, tile, and glass. tyoubox-JR https://twitter.com/1ridha http://ridha.tumblr.com/
Views: 91 tyouboxJR
Mach-Zehnder Interferometer with Phase Shifts
 
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http://demonstrations.wolfram.com/MachZehnderInterferometerWithPhaseShifts The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily. This Demonstration illustrates the operation of a Mach-Zehnder interferometer with phase shifters. The red and blue laser beams (on top and bottom) represent two possible paths. Photons start off in the |1,0? state. The lower beam splitter applies... Contributed by: Francesco Insulla Audio created with WolframTones: http://tones.wolfram.com
Views: 1826 wolframmathematica
Less than .25 -dbm and 1.25 % DIST @ -67 -dbm ... not bad.
 
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Get it "Fine Tuned" not peaked and ruined! Getting the picture? If they can't show it "like this" then you were mislead and paid too much. Click the "SHOW MORE" button below and learn how to identify the scammers, con artist and golden screwdriver jockeys. Yes, there'll always be disgruntled haters, it's what "they" do best. Often imitated but never duplicated. Real World Performance, not meterbaited. Contact info below. To the point plain and clear why you don't have the watts, range, clarity or reliability. Pay Attention, radios not only transform signals in to waves, they transform waves into sound. Loud, ringy tinny, over modulated spatter box radios are called competition or comp-tuned due to so-called swing kits, mods kits and misalignment's performed by golden screwdriver magicians. Yes, magicians not technicians. This type of loony tunes are useless in the real world. They'll poise a meter at you while making strange vocal sounds into the mic displaying exaggerated numbers and calling it rms, average or bird watts. They don't have a clue what each unit of measurement actually is or even how to derive it but they sure do put on a show !! lol How to recognize .. They ask you to "look at the meter" and claim that a pure waveform on a Oscope and a tuned system test bench isn't necessary. Their "meter show" might look impressive but in the real world these tunes yield far less power, range, clarity, reliability and a noisy distorted receiver. Sound familiar? It's OK, many have fallen for these gimmicks and tricks so don't feel bad. It takes some people 30 years + before the see the light. *** What Most CB And 10 Meter Radio Techs Don't Want You To Know *** Do your due diligence and demand the testing of your equipment on a minimum 100 MHz Oscope, Bird 4314c meter, 1 GHz spectrum analyzer on a tuned system test bench with a "Certification of Calibration". A tuned system test bench is the only accurate way of measuring spurious emissions, harmonics and "true power" in watts @ the fundamental frequency thus replicating real world performance and achieving maximum range, clarity and proven reliability. Deliberately only displaying amps, volts, and watts on a jacked up happy meal meter with a distorted waveform utilizing un-calibrated test equipment is a misrepresentation and an illusion playing on your ignorance while insulting your intelligence! If they cant display or explain ac volts, pep, pk, cw, rms (Ohms Law), capacitance, inductance and the basic principles of a phase shift then how do you expect them to test, tune and align your system ? ?? The Faster Rats *** PAY ATTENTION *** CB Rat Race Beware the con-artist shyster type that only displays one device at a time. He'll show a meter then a scope and maybe a spectrum analyzer but never "everything all at the same time while fully modulating the carrier". Not pointing fingers but I've seen these scams from coast to coast for almost 35 years in truck stops cb shops, YouTube and now in Facebook Groups. Another shady trick is they'll yell into the mic while showing you an exaggerated power output on the meter but then talk softly while displaying a misleading pattern on the scope. Getting the picture? Getting mad? You should be! Make sure exhibited is your equipment fully modulated including the meter, scope and spectrum analyzer "All AT THE SAME TIME" and not just a fabricated picture or photo. A video of everything at the same time is the only way of keeping these "magicians" at bay. Don't let them play Houdini hokus pokus watts on you. Most important, find someone who's competent, has a Service Monitor with a Certification of Calibration and not just a golden screwdriver magician with some test equipment trying to baffle you with their BS and you'll thank me later. Never settle for less because that's what what you'll get, Houdini tricks and Casper the friendly Ghost's hocus pocus watts! Are you picking up what I'm putting down? 10 Meter Radio updates, tunes and comprehensive alignments are my specialty. Talk further and clearer, hear less white noise and further too. Sorry, not accepting walk-ins. Contact: https://www.youtube.com/watch?v=P0W_Ltzeyyc Other viewing: 1) Start to finish https://www.youtube.com/watch?v=kKRpSSNNpWQ 2) RX sensitivity 1 https://www.youtube.com/watch?v=fiL6mm_5Tk8 3) RX sensitivity 2 https://www.youtube.com/watch?v=a2YK_G29Jv0 4) Real watts https://www.youtube.com/watch?v=DqEOabYqhQo 5) length matter? https://www.youtube.com/watch?v=XJDtYDqYsIA 6) Linear looks like https://www.youtube.com/watch?v=DvkeFsRMdeY 7) Good stud vs bad https://www.youtube.com/watch?v=1ltFVSxGp5Y 8) 50 ohm Law https://www.youtube.com/watch?v=vK9mIYPado4 9) Big radios and fans https://www.youtube.com/watch?v=R-QCOt1UFwg 12) Pl259's and keeping them dry https://www.youtube.com/watch?v=-JbjIQb_vjM 13) 45 miles 4 watts https://www.youtube.com/watch?v=h-nlIsrZknc 73's! 163 Hardrive
Views: 2786 Fine Tune CB Shop
Fiber Optics #05 Optical Fiber Fabrication
 
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Fiber Optics #05 Optical Fiber Fabrication Welcome to the 5th lecture of fiber optics. In this lecture we are going to learn about Optical Fiber Fabrication. We will see what types of materials are used in Optical Fiber Fabrication. various techniques for fabrication of optical fibers are also explained. Fiber Optics/ Optical Fiber Lectures from IIT for GATE, IES, ESE @ https://goo.gl/ngcoSi
Views: 380 XoviabECE