Compared to booster optical amplifiers boas and semiconductor optical amplifiers soas, erbiumdoped fiber amplifiers edfas can amplify femtosecond pulses to significantly higher peak power levels. Flat gain nextgeneration variable gain function module. Distances of optical transmission systems can be increased by using optical amplifiers. Mar 03, 2011 edfa stands for erbium doped fiber amplifier and it is one type of many different optical amplifiers. This allows the link reach to be extended 3 to 4 times in. The edfa optical amplifier units can be used in telecom and datacom sonetsdhdwdmgigabit ethernet applications to change an electrical signal into an optical signal and vice versa.
Mulotcedfavx description the multicom mulotcedfav 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. Compare edfa amplifier price super offer from aliexpress. Edfa vs raman optical amplifier fiber cabling solutions. These lband edfa instruments are erbium doped fiber amplifiers edfa which offer excellent power stability and high output power. Optical amplifier is the device which increases the strength of the optical signal. All speedamplifiers are capable to transfer up to 96 dwdm wavelengths via a single pair of fiber. An optical amplifier amplifies an optical signal directly, without the need to first convert it to an electrical signal. Carefully read all safety and operating instructions before operating this equipment, and retain them for future reference. For the contribution history and old versions of the redirected page, please see its history. 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. This model does not apply to raman amplifiers an optical amplifier provides gain over a useful spectral range, as shown here for an erbiumdoped fibre amplifier. Available optical output levels range from to 24dbm. The basic design of an optical receiver consists of an edfa, an optical band pass filter, a photon detector, a limiting amplifier, and an electrical low pass filter 1. Pdf information uprising implies that networks based on internet require high.
Our ramanedfa hybrid amplifiers combine ramans low effective noise figure with edfas high output power to provide a highosnr solution suitable for high bitrate longhaul applications. Eindhoven university of technology master an optical amplifier. Edfa erbium doped fiber amplifier is an optical device used to compensate optical signal attenuation caused by fibers and components, to increase optical transmission distance. Each system has simulated by the same set of parameters, and each system consists of transmitter, optical amplifier edfa soa, optical fiber cable, receiver photo detector and lpf, power meters and. Gain spectrum, gain saturation, and amplifier noise. Preamp edfas are becoming an integral part of optical receivers since their performance is interrelated to.
Optical amplifier edfa erbiumdoped fiber amplifier for. Design and development of erbium doped fiber amplifiers. You would just need to define the characteristics such as gain and noise figure. An important class of lumped optical amplifiers makes use of rareearth. Erbium doped optical fiber amplifiers edfas have low noise and can amplify many wavelengths. A power splitter is used to separate the signal to each onu. Optoamplifier basic function optical amplifier typessoa. An integrated approach to the ramanedfa design optimizes spectral flatness and control flexibility to extract the best possible osnr performance across. Performance analysis of optical amplifiers edfa and soa. Erbium doped fiber amplifier is the major type of the fiber amplifier used to boost the signal in the wdm fiber optic system, as we know it is wdm that increase the capacity of the fiber. Pdf enhancement in the gain of edfa in fibre optic. By combining the properties of edfa and soa, the amplification. Research article comparison of the optical amplifiers edfa and.
Comparison of the optical amplifiers edfa and soa based on. Optoamplifier basic function optical amplifier typessoa,edfa. A typical setup of a simple erbiumdoped fiber amplifier edfa is shown in figure 1. Boosting of an optical signal without any conversion of the. White paper introduction to edfa technology june 2009 1 introduction shortly after their commercialization in the early 1990s, erbium doped fiber amplifiers edfas became a key enabling technology for optical communication networks, and have since comprised the vast majority of all optical amplifiers deployed in the field.
Pdf in this work, a singlestage cband erbiumdoped fiber amplifier edfa has been constructed and characterized. To transmit a signals over long distances 100km, to compensate attenuation losses. Edfa, semiconductor optical amplifier soa and fiber raman amplifier. Pdf single stage cband erbiumdoped fiber amplifier edfa. 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 fiber amplifier is a key enabling technology for high speed optical communication. Dec 16, 2014 edfa, semiconductor optical amplifier soa and fiber raman amplifier. A fiberoptical cable television system using a reflective. Details on the amplification mechanisms involved are provided in the amplifier comparison section at the bottom of this tab.
Three different amplifier types booster, inline amplifier and pre amplifier can be used depending on the required distance and existing locations. The gain for an erbiumdoped fiber amplifier is shown in figure 7. The erbiumion doped fiber is pumped by feeding the light from a laser pump. White paper introduction to edfa technology optical. Attenuation optical amplification at regular intervals. This type of fiber is called erbiumdoped fiber, and is the key component in amplifying an optical signal in an edfa. Thorlabs corepumped erbiumdoped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of edfa with minimal sensitivi. Edfa optical amplifier user manual threshold value for alarm chapter 9. Each system has simulated by the same set of parameters, and each system consists of transmitter, optical amplifier edfasoa, optical fiber cable, receiver photo detector and lpf, power meters and. Optical amplifier basics when transmitting over long distance, the optical signal has to be amplified many times in between owing to the signal loss from fiber attenuation, connectivity.
After knowing the basic information of edfa and raman optical amplifiers, you must consider that the raman amplifier performs better for two main reasons. Todays modern longhaul dwdm systems use several advanced optical components to replace multiple repeaters with a single optical device. Preamp edfa ase noise characterization for optical. The optimum length of edfa is 7m and use forward pumping configuration for.
Bpf, the coupler is used to combine these branches as shown in figure 4. Optical amplifiers venkat venkataramanan instute for opcal. The erbiumdoped fiber amplifier edfa is the most deployed fiber amplifier as its amplification window coincides with the third transmission window of silicabased optical fiber. 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.
Lumentum has a suite of customizable preamp and postamp edfa solutions to meet all amplification needswhether at a roadm node or at an inline amplifier ila node. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. They enable the characterization of the gain, noise figure, and output power under unsaturated and saturated signal input regime. Three different amplifier types booster, inline amplifier and preamplifier can be used depending on the required distance and existing locations. 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. 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. Comparison of the optical amplifiers edfa and soa based on the ber and qfactor in cband article pdf available in advances in optical technologies 20171. The term doping refers to the process of using chemical elements to facilitate results. Design and analysis of all optical switch architecture. Optical amplifier plil packetlights plil dwdm platform is a 1u chassis designed to support a variety of optical applications such as extending the optical link power budget for building long distance dwdm solutions.
Wavelength division multiplexing is a technology for combine number of. Edfa amplifier archives tutorials of fiber optic products. It can be extended to merge access and metro networks. The main types of amplifiers are edfa earth doped fiber amplifier,semiconductor optical amplifiers soa and raman amplifier. 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. Prisma ii high power optical amplifiers edfa installation. If edfa doesnt merit its own page, then edwa certainly doesnt. Or edfa is an optical device that amplifies the optical signals without optoelectronic and electro optical conversion. Advanced optical components erbiumdoped fiber amplifier. 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.
Optical amplifiers provided by fibermart are designed for all network segments access, metro, regional and long haul and applications telecom, cable and enterprise. Edfa erbiumdoped fiber amplifier is one type of many different optical amplifiers that can achieve signal amplification over longhaul optical communication. There are various types including the edfa, raman, and semiconductor configurations. Common fiber optical amplifiers include erbiumdoped fiber amplifier or edfa optical amplifier, raman fiber amplifier, and silicon optical amplifier soa. You wouldnt have to design its parameters in the way you have to do for edfa. The edfa optical amplifier units can be used in telecom and datacom sonetsdhdwdmgigabit ethernet applications to change an electrical signal into. Amongst the wide range of products for sale choice, edfa optical amplifier is one of the hot items.
An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. Many fiber optic applications, such as longhaul dwdm systems, require amplification of the optical signal. Two bands have developed in the third transmission window the conventional, or cband, from approximately 1525 nm 1565 nm, and the long, or lband, from. Today, we are going to study and compare different types of optical amplifiers in this paper. 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. Optimization tool for erbium doped fibre amplifiers electrical and.
The development of edfa provide tremendous growth in communication system capacity. Optical amplifier gain db 40 nm spectrum of 16 amplified wdm channels using edfa. New pumping methods and materials are also improving the performance of raman amplifiers. Rare earth doped fiber amplifiers are of two types edfa erbium doped and pdfa praseodymium doped. Optical ampsraman and erbiumdoped fiber amplifiers pp.
Preamp edfa ase noise characterization for optical receiver. Edfa, single stage, double stage, double pass, gain flatting, gain ripple. Difference between using optical amplifier and edfa optiwave. Times new roman arial wingdings arial narrow default design optical amplifiers an important element of wdm systems nortel optera system optical amplifiers basic concepts applications semiconductor optical amplifiers generic optical amplifier solid state amplifier gain versus power distributed fiber amplifiers amplification process of edfa fig. Wdm is based on the idea of combining several optical. 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. Lumentum offers the most comprehensive portfolio of highperformance amplifiers raman, high power edfas, wide dynamic gain range edfas, edfa arrays in the industry. The multicom mulotcedfav 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 primary difference is that they do not have a resonator. At the heart of edfa technology is the erbium doped fiber edf, which is a. Thorlabs corepumped erbiumdoped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of 100km, to compensate attenuation losses.
Optical amplifier portfolio lumentum operations llc. Types of optical amplifiers, raman amplifier vs edfa. Used in conjunction with edfa s semiconductor optical amplifiers small package potential use for lowcost applications potential use for optical switching opti 500 c, spring 2011, lecture 23, introduction to optical amplifiers 1 types of optical amplifiers. Edfa is an optical amplifier that uses a doped optical fiber as a gain medium to amplify an optical signal. Pdf comparison of the optical amplifiers edfa and soa based. The different amplifiers, such as erbium doped fiber amplifiers edfa, raman amplifiers ra, semiconductor optical amplifier soa. Edfa erbium doped fiber amplifier physics and radio.
At least the loss limitation can be partially canceled out by the introduction of optical. Dec 29, 2014 many fiber optic applications, such as longhaul dwdm systems, require amplification of the optical signal. The hybrid module consists of a count\ erpropagating raman pump unit and a variable gain \vg\ edfa. It is used in the telecommunications field and in various types of research fields. Rp photonics encyclopedia erbiumdoped fiber amplifiers. Before the comparison of the different types of optical amplifiers, lets take a closer look at fiber optic amplifier. Pdf comparison of the optical amplifiers edfa and soa. Edfa erbium doped fibre amplifier and soa semiconductor optical amplifier optical amplifiers in. Firstly, it has a wide band, while the band of edfa is only from 1525 nm to 1565 nm and 1570 nm to 1610 nm. Hybrid ramanedfa module key features integrated raman and edfa. 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 contents of the erbiumdoped waveguide amplifier page were merged into optical amplifier on 3rd october 2012. The optical amplifier component acts as a black box optical amplifier in optisystem, meaning it can be any type of optical amplifier. However, cable television systems for lr access networks.
Keywords optical communications, wdm, optical amplifier, edfa. Erbium doped fiber amplifiers is a bonafide work done by mr. In the past, this entailed using expensive electronic repeaters at intermediate points every 100 km. In the shown case, the active fiber is pumped with light from two laser diodes bidirectional pumping, although unidirectional pumping in the forward or backward direction codirectional and counterdirectional pumping.
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