Many tunable laser designs output low optical power levels and must be immediately followed by an optical amplifier. The amplifier is provided in a micro 45x70x12 mm package, and exhibits low power consumption allowing it to be easily i ntegrated onto space and power constrained transponder line cards. Semiconductor optical amplifiers soas fiber raman and brillouin amplifiers rare earth doped fiber amplifiers erbium edfa 1500 nm, praseodymium pdfa 0 nm the most practical optical amplifiers to date include the soa and edfa types. However, direct measurement is difficult because the actual ase is. Optical ampsraman and erbium doped fiber amplifiers edfas pp. The erbiumion doped fiber is pumped by feeding the light from a laser pump.
We introduce each of these amplifiers in the following subsections. High power 1550nm edfa, erbium doped fiber amplifier. Semiconductor optical amplifier soa and erbiumdoped fiber amplifier edfa are two of the main types of optical amplifiers, and they were used in this simulation model to analyze their performance, with a data rate of 622 mbs stm4 level and 170 km. It is a close relative of an edfa, erbiumdoped fiber amplifier, and in fact edwas basic operating principles are identical to those of the edfa.
Optical amplifiers with the demand for longer transmission lengths, optical amplifiers have become an. Types of optical amplifiers, raman amplifier vs edfa. Time domain simulation of optical amplifiers incorporating. Click download or read online button to get optical amplifiers book now. Both of them can be used to amplify infrared light at wavelengths in optical communication bands between 1500 and 1600 nm. Erbiumdoped fiber amplifier edfa is an optical amplifier used in the cband and lband, where the loss of telecom optical fibers becomes lowest in the entire optical telecommunication. Several gain control techniques have been suggested to combat the gain fluctuations of edfa with this type of traffic. New pumping methods and materials are also improving the performance of raman amplifiers. We have a series of erbiumdoped fiber amplifier edfa optical amplifiers, including dwdm edfa for dwdm systems, catv edfa for catv applications, sdh edfa for sdh networks. Prisma ii 1550 nm gainflattened optical amplifier installation and operation guide pdf 7 mb prisma ii headend driver amplifiers heda installation and operation guide pdf 741 kb prisma ii high power optical amplifiers edfa installation and operation guide pdf 3 mb prisma ii hybrid amplifier installation guide pdf 3 mb.
Comparative performance of ramansoa and raman edfa. Pdf narrow line width dual wavelength edfa based random. The em316ea family of cband edfa optical amplifiers is part of the fiber driver optical multiservice platform solution. Output powers ranging from 14 to 21 dbm are available in a single. At least the loss limitation can be partially canceled out by the introduction of optical.
It has a builtin web server and has back reflection function, also it has control mode. Variation of optical power over specified temperature, wavelength, and all polarization states. The edfa is composed of three erbium doped fiber edf stages assembled in a serial architecture. Optical amplifiers venkat venkataramanan instute for opcal. An optical fiber is doped with the rare earth element erbium so that the glass fiber can absorb light at one frequency and emit light at another. Oasix is provided free of charge to ofs edf customers to model the performance of ofs edf in. As a market and technology leader in optical amplifiers for over two decades, lumentum leverages vertical integration and deep knowhow to continue to offer points of. Many output power and port configuration options are available. Effectiveness of gain control in edfas against traffic. Currently it is not possible to create a fully optical communication system without a software tool which simulates an optical communication line in real conditions prior to its construction.
Introduction erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of. To transmit a signals over long distances 100km, to compensate attenuation losses. Aug 25, 2019 an optical amplifier is a device that amplifies an optical signal directly, without the need to first the most common example is the erbium doped fiber amplifier edfa, where the core of a silica the amplification window of an optical amplifier is the range of optical wavelengths for which the amplifier yields a usable gain. Thorlabs corepumped erbiumdoped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of edfa with minimal sensitivi. The effectiveness of two such methods are investigated namely highly inverted amplifiers and all optical gain clamping, while. Optical ampsraman and erbiumdoped fiber amplifiers pp. Involves changing the wavelength of an optical signal. A simplified schematic illustration of an edfa optical amplifier. An efficient gainflattened lband optical amplifier is demonstrated using a hybrid configuration with a distributed raman amplifier dra and an erbiumdoped fiber amplifier edfa for 160. Alan kost associate research professor of optical sciences, university of arizona. The model of both semiconductor optical amplifier soa and erbium dopedfiber amplifier edfa is implemented. Erbium ions are included in the core of a section of optical fibre. The optpre is equipped with a builtin variable optical attenuator voa that controls the gain tilt and can also be used to pad the dcu to a reference value.
Between these stages are inserted two gain flattening filters gff in order to achieve a balance between the control of the gain tilt and the gain bandwidth. The counter propagating geometry produces a noisier amplifier with high output power. Our highpower edfa offers a flexible, lowcost solution for large area networks and features an. Pl2000h erbium doped fiber amplifier is the first unit to embed touchscreen lcd in catv industry. Its features are put to use in this reference design for laser and thermoelectric cooler control in edfa and raman optical amplifiers. The high density hd erbium doped fiber amplifier edfa is designed to fit into a prisma xd chassis or a standard full height prisma ii chassis with the use of a host module. Mar 03, 2011 edfa stands for erbium doped fiber amplifier and it is one type of many different optical amplifiers. The optical amplifiers that find widespread use in opt. High power 1550nm edfa, erbium doped fiber amplifier, benchtop edfa instruments with adjustable power up to 10 watts. Lumentum offers the most comprehensive portfolio of highperformance amplifiers raman, high power edfas, wide dynamic gain range edfas, edfa arrays in the industry. Fiber optical communication lecture 11, slide 5 osnr due to edfa noise 7. Edfa consists of an optical fiber having a core doped with the rareearth element erbium.
How to use edfa in ftthdp and tp erbiumdoped fiber. In the pulse method, since the metastable erbium ions in the edfa require a relatively long time to recover the ground state, if the onoff switching cycle of the optical input to the edfa is sufficiently shorter than the recovery time, the ase can be measured directly by measuring the output of the edfa while the optical signal is off. Erbium doped fiber amplifier edfa raman amplifier ra semiconductor optical amplifier soa ytterbium doped fiber amplifierydfa erbium ytterbium codoped fiber amplifier eycdfa. This type of fiber is called erbiumdoped fiber, and is the key component in amplifying an optical signal in an edfa. Allows signals to be amplified within the signal path. Optical amplifiers, edfa, tdfa, yttriadoped, telluritedoped, fluoride doped. May 18, 2015 erbiumdoped fiber amplifier edfa is an optical repeater device that is utilized to boost the intensity of optical signals being carried through a fiber optic communications system. Trans max 41xx series field hardened hubs trans max tm4100 field optical amplifier tm4100a specifications optical amplifiers edfas. Optical amplifiers provided by fibermart are designed for all network segments access, metro, regional and long haul and applications telecom, cable and enterprise. To grow your business and your revenue operators want the knowledge, assets and impartial technical guidance only a true partner can deliver.
Edfa erbiumdoped fiber amplifier edfa is the most widely used fiberoptic amplifiers, mainly made of erbiumdoped fiber edf, pump light source, optical couplers, optical isolators, optical filters and other components. Cisco prisma ii hd edfa optical amplifier from mhz. The aim of this article is to establish a comparison between the edfa erbium doped fibre amplifier and soa semiconductor optical amplifier optical amplifiers in the wdm wavelength division. Thorlabs also offers a benchtop erbiumdoped fiber link amplifier developed by our strategic partner. Optical amplifiers are important in optical communication and laser physics. The formation of a dual wavelength laser source can be achieved using a semiconductor optical amplifier soa or an erbium doped fiber amplifier edfa 3,6, 7. This all optical amplifier enables simultaneous amplification of multiple wavelengths. Available optical output levels range from to 24dbm. The optical signal is injected into this fiber, along with the light from a special pump laser that is designed to excite the erbium ions. The hybrid module consists of a count\ erpropagating raman pump unit and a variable gain \vg\ edfa. Syrotech edfa erbium doped fiber amplifier with and without wdm, we can use this edfa for provide television services and internet services in same fiber cable.
Prisma ii optical amplifiers offer a wide range of configurations and output powers for outstanding network architectural flexibility. Optical signals entering the fiber stimulate the excited erbium. Optical amplifiers amplify an optical signal directly, without the need to first convert it to. Pump energy provided by 980nm or 1480nm radiation ideal for laser diodes. Erbium doped fiber amplifier, catv 1550nm edfa, catv edfa. Cisco ons 15454 dwdm line card configuration guide. The erbium doped fiber amplifier edfa is an imperative element in dwdm networks.
The ofs oasix optical amplifier simulation system is a sophisticated simulation software package that helps determine which ofs edf is best for you. Light from one or more external semiconductor lasers is coupled into the fiber, exciting the erbium atoms. The term doping refers to the process of using chemical elements to facilitate results. Boosting of an optical signal without any conversion of the. The erbium doped fiber amplifier edfa is commonly used in current optical networks. Fiber driver optical amplifier modules provide multifunction, low noise, erbiumdoped fiber amplifier edfa solutions that are ideal for metro dense wavelength division multiplexing dwdm applications. Erbiumdoped fiber amplifier edfa is an optical repeater device that is used to boost the intensity of optical signals being carried through a fiber optic communications system.
Edfa optical amplifier user manual threshold value for alarm chapter 9. Finisars hybrid raman edfa module enables costeffective deployment of ultralong haul networks as well as the extension of existing longhaul, regional and metro networks, without the need for 3r oeo regeneration. To compare performance of the hybrid amplifiers, the eye diagrams of detected signals were analyzed and the. Dec 16, 2014 doped fiber amplifier the typical representative. Distributed optical fibre sensors based on brillouin scattering.
Thorlabs optical amplifiers are available as complete benchtop systems or as pigtailed butterfly packages. Comparison characteristic edfa raman amplification band dopant dependant depends on pump wavelengths bandwidth 20 nm, more for multiple dopants 48 nm, more for multiple pumps gain 20 db or more. White paper introduction to edfa technology june 2009 1 introduction shortly after their commercialization in the early 1990s, erbium doped fiber amplifiers edfa s became a key enabling technology for optical communication networks, and have since comprised the vast majority of all optical amplifiers deployed in the field. Edfa erbium doped fiber amplifier tutorial exfiber optical technologies co. We were the first to implement linear fiber optic transmission for the cable industry and we continue to develop leadingedge technologies for cable hfc networks. Emcore designs and manufactures the most complete and advanced line of optical components and systems for catv broadband transport and access networks. An optical amplifier pump laser reference design based on the amc7820 rick downs data acquisition products abstract the amc7820 is an integrated circuit designed for analog monitoring and control. His areas of research include optical data storage, optical communications, integrated optics, nanooptics. Combined edfa and raman amplifications with only an edfa at the transmit end the optical power level decreases over the fiber length with an edfa and raman the minimum optical power level occurs toward the middle, not the end, of the fiber. Optical amplifier an overview sciencedirect topics. The primary difference is that they do not have a resonator. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Boosting of an optical signal without any conversion of. The prisma ii optical amplifiers are available as pre amplifier, post amplifier, hybrid amplifier, and gainflattened erbiumdoped fiber amplifier edfa modules.
Introduction to optical amplifiers 517 an edfa with a counter propagating pump is pictured in figure 6. The different amplifiers, such as erbium doped fiber amplifiers edfa, raman amplifiers ra, semiconductor optical amplifier soa. An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. Our solutions multivendor, multitechnology system solutions. These amplifier modules can be used as building blocks to configure an optical transmission link for long haul, metro. The gain for an erbiumdoped fiber amplifier is shown in figure 7.
It is used in the telecommunications field and in various types of research fields. Performance analysis of optical amplifiers edfa and soa. The copropagating geometry produces an amplifier with less noise and less output power. An optical fiber is doped with the rare earth element erbium so that the glass fiber can absorb light at one frequency and emit light at another frequency. Figure 1 semiconductor optical amplifier modern optical networks utilize soas in the follow ways.
Finisars single channel micro edfa is a costeffective micro processorcontrolled module for amplifying single channels in the cband. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. Optical amplifier the arris fa3500 series is a family of high. Alan kost is an associate research professor of optical sciences in the university of arizona.
This site is like a library, use search box in the widget to get ebook that you want. The prisma ii optical network allows for best in class architectures with increased reliability, scalability, and costeffectiveness. Measurement of nf requires accurate measurement of the edfa amplified spontaneous emission ase level. The multicom mulotc edfa v 1550nm highperformance erbium doped fiber amplifier edfa module with a jdsu pump laser is a low noise 1550nm optical amplifier designed to be used in the multicom optical transport chassis mulotcchv. The edfa r employs an intelligent temperature control system by utilizing a special temperature control circuit and ventilating heat, resulting in a reduction of up to 30% in power consumption. The optpre is a cband, dwdm, twostage erbiumdoped fiber amplifier edfa with midamplifier loss mal that can be connected to a dispersion compensating unit dcu. The use of a distributed sensing system for railway monitoring was first reported in 2006 where a distributed optical fibre sensor based on brillouin optical time domain reflectometry botdr was used to measure the rail deflection over a 70 m stretch of the track. Mulotc edfa vx description the multicom mulotc edfa v 1550nm highperformance erbium doped fiber amplifier edfa module with a jdsu pump laser is a low noise 1550nm optical amplifier designed to be used in the multicom optical transport chassis mulotcchv. An optical amplifier pump laser reference design based on the. Comparison of the optical amplifiers edfa and soa based on. There are three important types of optical amplifiers. Erbiumdoped fiber amplifier edfa is an optical repeater device that is utilized to boost the intensity of optical signals being carried through a fiber optic communications system. An optical amplifier is a device that amplifies an optical signal directly, without the need to first the most common example is the erbium doped fiber amplifier edfa, where the core of a silica the amplification window of an optical amplifier is the range of optical wavelengths for which the amplifier yields a usable gain. Optical amplifiers download ebook pdf, epub, tuebl, mobi.
An erbiumdoped waveguide amplifier or edwa is a type of an optical amplifier. Oct 26, 2018 syrotech edfa erbium doped fiber amplifier with and without wdm, we can use this edfa for provide television services and internet services in same fiber cable. Our line of benchtop optical amplifiers includes ytterbiumdoped fiber amplifiers ydfas, a praseodymiumdoped fluoride fiber amplifier pdfa, and erbiumdoped fiber amplifiers edfas. Many model options serve all the traditional amplifier applications in an extended optical link.
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