Digital library video clips, presentation files, etc. Today, we are going to study and compare different types of optical amplifiers in this paper. Soa amplifiers use a semiconductor to provide the gain medium, the structure of soa is similar to semiconductor lasers. Before the comparison of the different types of optical amplifiers, lets take a closer look at fiber optic amplifier. Sdm optical amplifiers utilize an erbiumdoped fiber edf as the.
Conclusionoptical amplifiers perform a criticalfunction in modern optical networks,enabling the transmission of manyterabits of data over. Shortly after their commercialization in the early 1990s, erbium doped fiber amplifiers edfas became a key enabling technology for optical communication. A typical setup of a simple erbiumdoped fiber amplifier edfa is shown in figure 1. There are multiple types of optical amplifiers and the most common used in the optical transmission system are semiconductor optical amplifier soa and erbium doped fiber amplifier edfa.
These amplifier modules can be used as building blocks to configure an optical transmission link for long haul, metro. They are simple to operate, affordable benchtop instruments for laboratory research or manufacturing test applications. The development of erbiumdoped fiber amplifiers edfa in the latter half of the 1990s supported amplification of signals using wavelengthdivision multiplexing wdm and permitted the spread of longdistance, large capacity communications, such as optical submarine cables and optical subscriber systems. Emcore designs and manufactures the most complete and advanced line of optical components and systems for catv broadband transport and access networks. Making use of the time domain simulation, the noise behavior of optical amplifiers can be predicted and evaluated. Optical signal loss occurs inevitably during transmission in such a longhaul transmission. Its core is the erbiumdoped optical fiber, which is typically a singlemode fiber. Edfa optical fiber amplifiers provide inline amplification of optical signals by effecting stimulated emission of photons. 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.
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. Many model options serve all the traditional amplifier applications in an extended optical link. The prisma ii optical network allows for best in class architectures with increased reliability, scalability, and costeffectiveness. 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. It provides customers with the capability to extend their 100ghz, up to 40 channels, 2. The ap3370 erbiumdoped fiber amplifier edfa modules are designed to meet the need for cband testing of active and passive components. Doped fiber amplifier and fiber laser file exchange.
Doped fiber amplifiers dfas are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. The counter propagating geometry produces a noisier amplifier with high output power. This work demonstrates the simulation of two different types of optical fiber amplifiers ofa utilizing optisystem10, namely, 3 m length of erbium doped fiber amplifier edfa and 7 km length of. Together with wavelengthdivision multiplexing wdm technology, which allows the transmission of multiple channels over the same fiber, optical amplifiers have. Optical amplifiers an important element of wdm systems. The prisma ii optical amplifiers are available as pre amplifier, post amplifier, hybrid amplifier, and gainflattened erbiumdoped fiber amplifier edfa modules. Gain and noise figure performance of erbium doped fiber amplifiers edfa a.
Optostar 64667c 1550 nm erbium doped fiber amplifier. 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. Stability of a 500 km erbiumdoped fiber amplifier cascade dtu orbit. At the heart of edfa technology is the erbium doped fiber edf, which is a conventional silica fiber doped with erbium.
Eindhoven university of technology master automatic gain. An e1ectrical control circuit uses this junction voltage to control the gain ofthe. An optical amplifier is necessary for a longhaul space division multiplexing sdm transmission. They enable the characterization of the gain, noise figure, and output power under unsaturated and saturated signal input regime. 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. Erbiumdoped spiral amplifiers with 20 db of net gain on silicon. A large signal input power is considered in this case, since high signal input helps to produce high output power, which is necessary to boosterpower amplifiers. The dwdm edfa is a lownoise, gainflattened cband optical erbium doped fiber amplifier edfa designed to extend the distance in dense wavelengthdivision multiplexing dwdm optical infrastructure. Amplificateur optique edfa pdf 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. 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. Finisars single channel micro edfa is a costeffective micro processorcontrolled module for amplifying single channels in the cband. A more complete description can be found in the references.
It is designed for a single wavelength applications in full extended cband fiber optic communications system in core networks, access networks, or catv networks. Oba17 optical booster amplifier avara raman and edfa based optical amplifiers provide an efficient, costeffective and reliable way to deliver longhaul pdh, sdh and giga bit ethernet transmission solutions the avara optical pre amplifier product is rack mountable raman amplifier with integrated edfa preamp and dcm modules for use in long haul. The first implementation of active fiber optic amplifier was demonstrated in 1994 with erbiumdoped fiber amplifier edfa. Optical amplification technologies for space division multiplexing. Pt, due to quantum noise, the onesided power spectral density variance per effective noise bandwidth of. Slow and fast light effects in semiconductor optical amplifiers for. Introduction erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. We were the first to implement linear fiber optic transmission for the cable industry and we continue to. These high power edfa instruments are 1550nm range cband erbium 1w doped and erbiumytterbium 10w doped fiber amplifiers which offer up to 10 watts of output power. 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. In steady state, dn2 dt 0, the ratio of level 1 and level 2 population to the total population can be written as. 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.
Dwdm edfa typical optical transport network solution. White paper introduction to optical amplifiers finisar corporation. The optostar 64667c 1550 nm edfa is microprocessor controlled to real time monitor and control. Theory on the timedynamic simulations is not yet included. 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. Finally, when light comes out at z l, its power is much higher compared to what it was at z 0. Time domain simulation of optical amplifiers incorporating. 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. Emcore 1550 nm catv optical amplificationedfa emcore. Many output power and port configuration options are available. Optical amplifier soaere baseret pa langsomt samt hurtigt lys.
The amplifying medium is a glass optical fiber doped with erbium ions. 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. The optostar 64667c 1550 nm erbium doped fiber amplifier edfa is designed for multiplex distribution configuration and long distance relay transmission network configuration in conjunction with the 1550 nm optical transmitter. Edfa optical amplifiers cband by name by function select input 10gigabitfiber 3gsdi 8vsb apc asi atsc audio catv coax composite cvbs cwdm ds3 dvb dvbs2 dvbt dvi dwdm e1 ethernet fiber gps hd hdmi iptv kband lband mpeg4 mw qam rf sband sc sd sdi sfp t1 telephone tv vga video wireless ypbpr. Edfa, semiconductor optical amplifier soa and fiber raman amplifier. Oba17 optical booster amplifier avara technologies. The copropagating geometry produces an amplifier with less noise and less output power. Cisco prisma ii hd edfa optical amplifier from mhz. Features fa3500 the aurora fa3500 series is a family of highoutput, extremely compact 1550 nm optical amplifiers. Boosting of an optical signal without any conversion of. The next time you need, linear video or multiscreen, mpeg, docsis or xphy tm, ip or rf resources to support the operation of multivendor, multitechnology products deployed in your hfc or fttx network, mhz can help choose from a customized package of remote fractional engineering hours you can use over an extended. This type of fiber is called erbiumdoped fiber, and is the key component in amplifying an optical signal in an edfa.
The model of both semiconductor optical amplifier soa and erbium dopedfiber amplifier edfa is implemented. White paper introduction to edfa technology optical. An optical amplifier is a device which receives some input optical signal and generates an output optical signal with higher power without the conversion to an electrical signal during the intermediate stages. Differences between preamplifier, booster amplifier and. Introduction to optical amplifiers 517 an edfa with a counter propagating pump is pictured in figure 6. Dwdm technologies, which are considered as the most costeffective ways to increase the network capacity over long transmission distance, have been widely applied in our. For a general introduction to optical amplifiers, please see finisars white paper introducti on to optical amplifiers. Rp photonics encyclopedia erbiumdoped fiber amplifiers. As the light propagates inside the waveguide it gets amplified. During operation as an optical amplifier, light is coupled into the waveguide at z 0. Edfa, or erbiumdoped fiber amplifier, is the most deployed optical amplifier in the wdm system that uses the erbiumdoped fiber as optical amplification medium to directly enhance the signals. Performance analysis of optical amplifiers edfa and soa.
The amplification process takes place in a socalled gain medium. Optical amplifiers download ebook pdf, epub, tuebl, mobi. Types of optical amplifiers, raman amplifier vs edfa. Comparison of the optical amplifiers edfa and soa based on. Gain spectrum, gain saturation, and amplifier noise. Eindhoven university of technology master an optical amplifier. Optical amplifier edfa erbiumdoped fiber amplifier. These amplifiers provide high power, high reliability, and superior optical performance.
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