Modeling of gain in erbiumdoped fiber amplifiers abstract. Osa theoretical modeling of erbiumdoped fiber amplifiers. In fiber amplifiers, low modedependent gain mdg minimizes the loss of capacity and the potential for outage 7. The selection of appropriate pump wavelength sources are very crucial. It indicates that the gain of eydfa deteriorates after being irradiated by a neutron dose. The model otebcob series erbium doped fiber amplifier is the perfect companion to the olson and families of 1550nm em and dm transmitters and and families of receivernodes. Black box model of erbiumdoped fiber amplifiers in c and l bands. At the heart of edfa technology is the erbium doped fiber edf, which is a conventional silica fiber doped with erbium. A real time multichannel dynamic erbium doped fiber amplifier edfa simulink model with flat gain and gain clamping facility has been developed on matlab mathematical laboratory platform. Erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. Introduction to optical amplifiers 417 a raman amplifier is distributed over a long span of optical fiber. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Transistors were commercially developed in the 60s, and they further reduced op amp size to several cubic inches, but the nickname brick still held on. Sergio granieri erbiumdoped fiber amplifiers edfa are one of the most widely used optical amplifiers in the field of optical communications and fiber lasers.
The first implementation of active fiber optic amplifier was demonstrated in 1994 with erbiumdoped fiber amplifier edfa. Optical satellite communications with erbium doped fiber. According to the previous literature survey, the erbium doped fiber edf is a reliable gain media for lasers and amplifiers. Erbium doped fiber amplifiers, 2 volume set desurvire, emmanuel on. The fiber can be used for lower power fiber lasers, preamplifiers and amplified spontaneous emission ase light sources. Implementation of three functional devices using erbiumdoped fibers.
Find more supplier details at the end of this encyclopedia article, or go to our. It is effective for wavelength multiplexing several signals and for different pumping. Erbium doped fiber amplifiers are traditionally pumped with either 980 nm or 1480 nm laser diodes, which correspond to exciting 11 2 4i and 2 4i levels respectively. An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. This is due to the fact that it is difficult to build optical amplifiers with pdgs. All supported by our gainmaster simulation software to help you design even the most complex edfas. Modeling highconcentration lband edfa at high optical. Modeling erbiumdoped fiber amplifiers semantic scholar.
The gain and noise performance are then examined under forward and reverse pumping. A dynamic simulink model for erbiumdoped fiber amplifiers overmodulation in presence of amplified spontaneous emission effect hossein sariri. The passage of the 1996 telecommunications act and the growth of the internet have sparked intense demand for expanded bandwidth in all network layers, resulting in significant advances in erbiumdoped fiber amplifier edfa technology. Its core is the erbiumdoped optical fiber, which is typically a singlemode fiber. Fibercores sm erbiumytterbium doped fiber df1500y is a singlemode sm erbium er and ytterbium yb doped fiber, providing extremely high levels of pump absorption and emission around the telecoms c and l band windows. Erbium fiber amplifiers is a comprehensive introduction to the increasingly important topic of optical amplification.
The calculated results by the proposed model are in good agreement with the experimental ones. Randy giles, member, ieee, and emmanuel desurvire, member, ieee invited paper abstracterbiumdoped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous, twolevel laser me dium. Encyclopedia letter e erbium doped fiber amplifiers. Excellent optical amplifiers are available in the form of erbium doped fiber amplifiers edfa. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiers. Erbiumdoped fiber amplifiers are an important technology for lightwave voice, video, and data transmission. To compensate for this attenuation, erbiumdoped fiber amplifiers edfas are commonly used to amplify the optical signal in the 1550 nm range. Eindhoven university of technology master an optical amplifier. Modeling and experiments of the gain and noise figure for. Edfls are used as sources for coherent light signal generation, while edfas are used as wavewave amplifiers for. Optical amplifiers with the demand for longer transmission lengths, optical amplifiers have become an essential component in longhaul fiber optic systems. Erbium doped fibre amplifiers edfa, featuring high gain over a large bandwidth, low intrinsic losses and long fluorescence times, have emerged over the past decades as key enabling components in wdm systems. With product ranges available offering polarization maintaining, bendinsensitive, rareearth doped, claddingpump and photosensitive fibers. The geometry of the inner clad has an octagonal shape which allows a high coupling efficiency of the multimode pump wave into the fiber.
A dynamic simulink model for erbiumdoped fiber amplifiers. We propose a novel numerical method based on genetic algorithm ga to solve the evolution equations that are the basis of modeling multichannel erbium doped fiber amplifiers edfas. Erbium ions exhibit a very narrow absorption bands, 10 nm at 980 nm for 3 level system and 1480 nm for 2 level system. Vacuum tube size and component size decreased until an op amp was shrunk to the size of a single octal vacuum tube. Fundamental design of a distributed erbiumdoped fiber amplifier for. Edfa can amplify signals over 1550 nm1558nm with frequency spacing is 0.
A parametric study to create an optimal design of sevencores hexagonal structured erbiumdoped fiber amplifier. Simple continuouswave, gainswitched and qswitched fiber lasers. Principles and applications offered an important exploration of the theninfant technology of erbiumdoped fiber. Modeling light amplification in erdoped singlemode fibers. Erbium doped fiber amplifiers 36 suppliers for erbium doped fiber amplifiers. This thesis describes theoretical and experimental studies on two subjects. Here, we study multimode erbium doped fiber amplifiers mmedfas for signals spatially multiplexed in 12 modes six spatial modes in two polarizations. Numerical methods are used to analyze the effects of optical. Gain and noise figure performance of erbium doped fiber amplifiers edfa a. Recently, the software rp fiber power has been extended such that this can be done. Erbiumdoped fiber amplifiers are traditionally pumped with either 980 nm or 1480 nm laser diodes, which correspond to exciting 11 2 4i and 2 4i levels respectively. Analytic modeling of erbiumdoped fiber amplifiers based on intensitydependent overlapping factors.
Pdf rate equations based on intensitydependent overlapping factors are integrated. Because corning produces fiber via the ovd process, it is by far the most uniform in the world. The detriment in the noise figure previously associated. Invited paper en efficient simulation model of the erbium. Principles and applications, appuyez sur extrait gratuit ou acheter. The noise performance of an erbium doped fiber amplifier edfa is characterized by modeling optical amplifiers as fourlevel or threelevel systems. Design and development of erbium doped fiber amplifiers. Modeling pairinduced quenching in erbiumdoped fiber amplifiers. The authors also studied the optical properties of the amplifier based on numerical modeling and had considered a fewmode fiber with refractive index. According to the research performed in recent years, it is known that the pumping of erbium doped fiber at 980 nm or. The core of the fiber is doped with erbium and is typically pumped with 980 or. Eindhoven university of technology master modeling and design.
A model of erbiumdoped fiber amplifier gain dynamics. Theoretical modeling of erbiumdoped fiber amplifiers with. Numerical methods are used to analyze the effects of optical modes and erbium confinement on amplifier performance, and to calculate both the gain and amplified spontaneous emission ase spectra. Erbium doped fiber amplifiber edfa model file exchange. Packed with information on important system experiments and the best experimental results to date as well as over 1,400 references to the expanding literature, erbiumdoped fiber amplifiers illuminates such key areas as. Implementation of three functional devices using erbium. A 7core erbium doped doubleclad fiber amplifier with side. Erbium doped fiber amplifier edfa for cband optical. Analytic modeling of erbiumdoped fiber amplifiers on the basis of intensitydependent overlapping factors. Detailed theoretical and experimental investigation of. Pdf analytic modeling of erbiumdoped fiber amplifiers. Performance analysis of dynamic erbium doped fiber amplifier. When employing edfas, the system wavelength is set to 1,550 nm.
Pdf modeling erbiumdoped fiber amplifiers semantic scholar. Based on this and using an occupation number model, we determined the limiting spectral efficiency of information transfer in such an amplifier. Characterization and modeling of erbiumdoped fiber. In the tobasco architecture, optical amplification is done by means of erbiumdoped fiber amplifiers edfas. They can serve both as booster amplifier in the transmitter and as preamplifier in the receiver. Erbiumdoped fiber laser erdoped fiber lasers edfls can be viewed as edfas operating in the particular regime where coherent oscillation of ase occurs due to some feedback means. In particular, the possibility of obtaining very small or very largemode area with this new kind of optical fibers has been exploited to realize new fiber lasers 6. Erbium doped fibers provide the basic building blocks for fiber optic amplifiers more specifically erbium doped fiber amplifiers edfas used in broadband optical networks and catv applications. 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. Sulaiman abstract one distinct feature of an optical fiber is that there is a wide spectral region where signals are transmitted in optical fiber. Invited paper en efficient simulation model of the erbiumdoped. This model is adequate for fast simulation of erbiumdoped fiber amplifiers. It is also designed to operate seamlessly with optical transmitters, receivers and nodes from most leading manufacturers.
Semiconductor optical amplifiers soas, erbium doped fiber amplifiers edfas, and raman optical amplifiers lessen. The model includes radial distribution of dopant and modal intensity in the optical fiber. Written by one of the pioneers in the field, this unique reference provides. Amplified spontaneous emission ase is taken into account so that the gain of asesaturated erbium doped fiber amplifiers is calculated properly. With over 30 years experience of the specialty optical fiber industry, fibercore ltd, the world leader in its field, is exclusively dedicated to the design, manufacture and commercialization of specialty fibers. A new method for the simple determination of crosssections 21 2. The amplified model of erbiumdoped fiber amplifier edfa. Oct 25, 2014 simulation of analytical model of erbium doped fiber amplifiber edfa. Design of multimode erbiumdoped fiber amplifiers for low. We describe an analytic method that calculates accurately within a 1. Arya and others published mathematical modeling of lband erbium doped fiber amplifier for optimum gain find, read and cite all the research you need on.
Detailed design analysis of erbiumdoped fiber amplifiers dtu orbit. Modeling pairinduced quenching in erbiumdoped fiber. Modeling the gain and amplified spontaneous emission spectra. Sm erbiumytterbium doped fiber newport corporation. 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. Numerical solution of a general rateequation model of an erbiumdoped fiber amplifier highlights several important features of the device. Introduction to erbiumdoped fiber amplifiers similar to electrical signaling over a wire, optical signals attenuate as they travel through an optical fiber. Pyfiberamp is a rate equation simulation library for rareearthdoped fiber amplifiers and fiber lasers partly based on the giles model. Erbium doped fiber amplifiers is a bonafide work done by mr. Pdf analytic modeling of erbiumdoped fiber amplifiers based on. Digiovanni ofs laboratories, 19 schoolhouse road, somerset, new jersey 08873.
Novel numerical method to model multichannel erbiumdoped. Gain modeling of erbiumdoped fiber amplifiers pumped at 980 nm thesis advisor. Optimization tool for erbium doped fibre amplifiers. Noise performance of erbiumdoped fiber amplifiers with. The model for the edfa, used in the analysis, assumes.
Pdf modeling erbiumdoped fiber amplifiers semantic. Rare earth amplifiers become a major component as an active device in fiber optic communication systems because of there is no requirement of electrooptical conversion during the amplification process. A parametric study to create an optimal design of seven. Modeling highconcentrationl band edfa at high optical powers based on inversion function vladimir chernyak and li qian, member, ieee abstract highconcentration erbiumdoped fibers used inband erbiumdoped fiber amplifier edfa are known to experience additional losses due to effects of energy transfer. At least the loss limitation can be partially canceled out by the introduction of optical. In the last case, there are two levels in the light generation. A difference in strongsignal gain between copropagating and counterpropagating signal pump schemes in the presence of pump excitedstate absorption is predicted, and this is confirmed by experiment. Thorlabs corepumped erbium doped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of edfa 17. Oct 23, 2019 pyfiberamp is a rate equation simulation library for rareearth doped fiber amplifiers and fiber lasers partly based on the giles model. The first case can be described by a threelevel laser model whereas the second case is a quasithreelevel system.
Modeling erbiumdoped fiber amplifiers ieee journals. An analytic method is described for fully characterizing the gain of an erbiumdoped fiber amplifier edfa that is based on easily measured monochromatic absorption data. Erbium doped fiber amplifiers are an important technology for lightwave voice, video, and data transmission. All a band of almost 30 to 35 nm extending from 1530 to1565 channels modulated with modulation rate to achieve data. Rp photonics encyclopedia erbiumdoped fiber amplifiers. Typically, the optical pump is introduced at the end of a length of fiber in order to provide optical gain that increases towards the end of the fiber. In this paper we analyze gain and noise figure of a c and an l band edfa verifying experimentally.
Amplified spontaneous emission ase is taken into account so that the gain of asesaturated erbiumdoped fiber amplifiers is calculated properly. Black box model of erbiumdoped fiber amplifiers in c and l bands a. Atomic level ions and atoms are critical for the amplification phenomena. Erbium doped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium. Abstract when pumping the erbiumdoped fiber amplifier at. Numerical solution of a general rateequation model of an erbium doped fiber amplifier highlights several important features of the device. The erbium ion is a crucial factor for the generation of the stimulated and spontaneous emission. Optical amplifiers, edfa, erbium doped fiber, gain, noise figure 1. Analytic modeling of highgain erbiumdoped fiber amplifiers. Modeling of gain in erbiumdoped fiber amplifiers ieee. Helmy department of electrical and computer engineering, university of toronto, 10 kings college road, toronto, on m5s 3g4, canada.
Gain modeling of erbiumdoped fiber amplifiers pumped at 980nm. Pdf numerical and analytical modeling of polarization. Validation of the applicability of mccumbers theory to the study of silicabased erbiumdoped fibers. Available in boost, inline, and pre amp configurations, the different models cover various transmission scenarios at points all along the optical communications path. Simulation of analytical model of erbium doped fiber amplifiber edfa. When the link consists of a number of concatenated amplifiers, then these statistics may lead to changes in received power level and even system failure. The progressive transition towards high capacity, alloptical networks has increased the. Eslamabadegharb branch, islamic azad university, eslamabadegharb, iran. Written by three bell labs pioneers, the book stresses the importance of the interrelation of materials properties, optical properties, and systems aspects of optical fiber amplifiers.
Optimized of erbiumdopedfiber amplifiers edfa parameters. Analytic modeling of highgain erbiumdoped fiber amplifiers osa. Doped fiber amplifier and fiber laser file exchange. Erbium doped fiber amplifier edfa for cband optical communication system m. Erbium ions exhibit a very narrow absorption bands, 10 nm at 980 nm for 3. For a general introduction to optical amplifiers, please see finisars white paper introducti on to optical amplifiers. A spatialmode model of erbiumdoped fiber amplifier edfa gain dynamics is presented. We have used a modified black box model to calculate the gain and amplified spontaneous emission spectra for an erbiumdoped fiber amplifier. Abstracterbiumdoped fiber amplifiers are modeled using the propagation and rate. Fibercore offers a number of different doped fibers including erbium doped fiber for various c and l amplifier configurations and ase applications. Importance of erbium doped fiber uniformity perhaps the most critical parameter for erbium doped fiber in high performance amplifiers is the uniformity of the gain spectrum from one coil to the next. Erbiumdoped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium. Erbiumdoped fiber amplifiers, 2 volume set desurvire, emmanuel on.
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