Bpf, the coupler is used to combine these branches as shown in figure 4. 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. Pdf comparison of the optical amplifiers edfa and soa based. 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. Boosting of an optical signal without any conversion of the. The primary difference is that they do not have a resonator. Hence if the signal occurs loss of about 20db if it travels a distance of 100km. Details on the amplification mechanisms involved are provided in the amplifier comparison section at the bottom of this tab. Carefully read all safety and operating instructions before operating this equipment, and retain them for future reference. A typical setup of a simple erbiumdoped fiber amplifier edfa is shown in figure 1. Performance analysis of optical amplifiers edfa and soa. 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. However, cable television systems for lr access networks. A power splitter is used to separate the signal to each onu.
Comparison of the optical amplifiers edfa and soa based on. Rare earth doped fiber amplifiers are of two types edfa erbium doped and pdfa praseodymium doped. Wdm is based on the idea of combining several optical. For the contribution history and old versions of the redirected page, please see its history. 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.
The development of edfa provide tremendous growth in communication system capacity. Distances of optical transmission systems can be increased by using optical amplifiers. 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. The edfa optical amplifier units can be used in telecom and datacom sonetsdhdwdmgigabit ethernet applications to change an electrical signal into. Pdf enhancement in the gain of edfa in fibre optic.
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. An integrated approach to the ramanedfa design optimizes spectral flatness and control flexibility to extract the best possible osnr performance across. You wouldnt have to design its parameters in the way you have to do for edfa. 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. Pdf single stage cband erbiumdoped fiber amplifier edfa. The edfa characteristics are analyzed for two different edf length 7m and m, and t wo. 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. 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.
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. These affordable turnkey benchtop instruments allow users to view and control pump power individually as well as view the overall power from the. 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. This type of fiber is called erbiumdoped fiber, and is the key component in amplifying an optical signal in an edfa. An important class of lumped optical amplifiers makes use of rareearth. 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. Flat gain nextgeneration variable gain function module.
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. 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. Attenuation optical amplification at regular intervals. The fiber amplifier is a key enabling technology for high speed optical communication. 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.
Optical amplifier edfa erbiumdoped fiber amplifier for. You would just need to define the characteristics such as gain and noise figure. 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. Prisma ii high power optical amplifiers edfa installation. 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. Compare edfa amplifier price super offer from aliexpress. Research article comparison of the optical amplifiers edfa and. Optimization tool for erbium doped fibre amplifiers electrical and. Edfa vs raman optical amplifier fiber cabling solutions.
Pdf in this work, a singlestage cband erbiumdoped fiber amplifier edfa has been constructed and characterized. Edfa optical amplifier user manual threshold value for alarm chapter 9. Gain spectrum, gain saturation, and amplifier noise. All speedamplifiers are capable to transfer up to 96 dwdm wavelengths via a single pair of fiber. Mar 03, 2011 edfa stands for erbium doped fiber amplifier and it is one type of many different optical amplifiers.
Pdf information uprising implies that networks based on internet require high. Edfa, semiconductor optical amplifier soa and fiber raman amplifier. This allows the link reach to be extended 3 to 4 times in. Preamp edfas are becoming an integral part of optical receivers since their performance is interrelated to. Three different amplifier types booster, inline amplifier and preamplifier can be used depending on the required distance and existing locations. Design and development of erbium doped fiber amplifiers. Optoamplifier basic function optical amplifier typessoa,edfa. Design and analysis of all optical switch architecture. The erbiumion doped fiber is pumped by feeding the light from a laser pump.
Available optical output levels range from to 24dbm. Preamp edfa ase noise characterization for optical. Optical amplifier is the device which increases the strength of the optical signal. 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. White paper introduction to edfa technology optical. To transmit a signals over long distances 100km, to compensate attenuation losses. Todays modern longhaul dwdm systems use several advanced optical components to replace multiple repeaters with a single optical device.
Three different amplifier types booster, inline amplifier and pre amplifier can be used depending on the required distance and existing locations. Or edfa is an optical device that amplifies the optical signals without optoelectronic and electro optical conversion. Erbium doped optical fiber amplifiers edfas have low noise and can amplify many wavelengths. Fixedgain, variablegain, and switchablegain versions at varying output power levels and noise figure metrics are available that are commensurate with the cost and performance. These lband edfa instruments are erbium doped fiber amplifiers edfa which offer excellent power stability and high output power.
By combining the properties of edfa and soa, the amplification. The term doping refers to the process of using chemical elements to facilitate results. 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 different amplifiers, such as erbium doped fiber amplifiers edfa, raman amplifiers ra, semiconductor optical amplifier soa. Edfa is an optical amplifier that uses a doped optical fiber as a gain medium to amplify an optical signal. The gain for an erbiumdoped fiber amplifier is shown in figure 7. Optical amplifier gain db 40 nm spectrum of 16 amplified wdm channels using edfa. Advanced optical components erbiumdoped fiber amplifier.
After knowing the basic information of edfa and raman optical amplifiers, you must consider that the raman amplifier performs better for two main reasons. 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. Optical ampsraman and erbiumdoped fiber amplifiers pp. In the past, this entailed using expensive electronic repeaters at intermediate points every 100 km. The optimum length of edfa is 7m and use forward pumping configuration for.
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. It can be extended to merge access and metro networks. Rp photonics encyclopedia erbiumdoped fiber amplifiers. Dwdm cband edfa booster, optical amplifier, with automatic power reduction apr,2 slots 20 22. The main types of amplifiers are edfa earth doped fiber amplifier,semiconductor optical amplifiers soa and raman amplifier.
Keywords optical communications, wdm, optical amplifier, edfa. 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. Its core is the erbiumdoped optical fiber, which is typically a singlemode fiber. Before the comparison of the different types of optical amplifiers, lets take a closer look at fiber optic amplifier. A fiberoptical cable television system using a reflective. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Edfa amplifier archives tutorials of fiber optic products. China edfa optical amplifier, edfa optical amplifier. There are various types including the edfa, raman, and semiconductor configurations. 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. Pdf comparison of the optical amplifiers edfa and soa.
Optical amplifiers provided by fibermart are designed for all network segments access, metro, regional and long haul and applications telecom, cable and enterprise. New pumping methods and materials are also improving the performance of raman amplifiers. 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. Eindhoven university of technology master an optical amplifier.
Wavelength division multiplexing is a technology for combine number of. An optical amplifier amplifies an optical signal directly, without the need to first convert it to an electrical signal. 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. Edfa erbium doped fiber amplifier physics and radio. Today, we are going to study and compare different types of optical amplifiers in this paper. Many fiber optic applications, such as longhaul dwdm systems, require amplification of the optical signal. Edfa, single stage, double stage, double pass, gain flatting, gain ripple. Lumentum offers the most comprehensive portfolio of highperformance amplifiers raman, high power edfas, wide dynamic gain range edfas, edfa arrays in the industry. They enable the characterization of the gain, noise figure, and output power under unsaturated and saturated signal input regime. Difference between using optical amplifier and edfa optiwave. Optical amplifiers venkat venkataramanan instute for opcal. 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. Preamp edfas are becoming an integral part of optical receivers since their performance is interrelated to the performance of the receiver photon detector. 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.
An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. Optoamplifier basic function optical amplifier typessoa. 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. Edfa erbiumdoped fiber amplifier is one type of many different optical amplifiers that can achieve signal amplification over longhaul optical communication. Thorlabs corepumped erbiumdoped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of 100km, to compensate attenuation losses. Dec 29, 2014 many fiber optic applications, such as longhaul dwdm systems, require amplification of the optical signal. Types of optical amplifiers, raman amplifier vs edfa. Optical amplifiers amplify an optical signal directly, without the need to first convert it to. Common fiber optical amplifiers include erbiumdoped fiber amplifier or edfa optical amplifier, raman fiber amplifier, and silicon optical amplifier soa. Dec 16, 2014 edfa, semiconductor optical amplifier soa and fiber raman amplifier.
Optical amplifier portfolio lumentum operations llc. Edfa erbium doped fibre amplifier and soa semiconductor optical amplifier optical amplifiers in. 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. If edfa doesnt merit its own page, then edwa certainly doesnt. It is used in the telecommunications field and in various types of research fields. Erbium doped fiber amplifiers is a bonafide work done by mr. 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. 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 optical signal is injected into this fiber, along with the light from a special pump laser that is designed to excite the erbium ions. Thorlabs corepumped erbiumdoped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of edfa with minimal sensitivi. The optical amplifier component acts as a black box optical amplifier in optisystem, meaning it can be any type of optical amplifier.
At least the loss limitation can be partially canceled out by the introduction of optical. 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. At the heart of edfa technology is the erbium doped fiber edf, which is a. In erbium doped fiber amplifier, for the most part two pump. Preamp edfa ase noise characterization for optical receiver.
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