Pdf numerical and analytical modeling of polarization. A new method for the simple determination of crosssections 21 2. Numerical solution of a general rateequation model of an erbiumdoped fiber amplifier highlights several important features of the device. Design and development of erbium doped fiber amplifiers. We present a theoretical and experimental study of erbiumdoped fiber amplifiers in saturated operation, examining designs in which erbium doping is distributed throughout the core. Black box model of erbiumdoped fiber amplifiers in c and l bands a. Numerical methods are used to analyze the effects of optical. Oct 01, 2001 we present a theoretical and experimental study of erbiumdoped fiber amplifiers in saturated operation, examining designs in which erbium doping is distributed throughout the core. Rightwave erbiumdoped optical fiber critical component for the amplification of optical transmission signals ofs has a corporate heritage in edf going back to 1989. Erbiumdoped fiber an overview sciencedirect topics. Temporal, spatial, and spectral modeling of erbiumdoped. We describe an analytic method that calculates accurately within a 1.
Randy giles, and emmanuel desurvire, modeling erbiumdoped fiber amplifiers. Theoretical modeling of erbiumdoped fiber amplifiers with. Pdf compact multimode pumped erbiumdoped phosphate fiber. With over 20,000 kilometers shipped in the past ten years alone, ofs marketleading fibers are. Validation of the applicability of mccumbers theory to the study of silicabased erbiumdoped fibers. The noise performance of an erbiumdoped fiber amplifier edfa is characterized by modeling optical amplifiers as fourlevel or threelevel systems. Simple, experimentallyverified expressions are presented for the signal gain, pump absorption and output noise spectrum of erbiumdoped fiber amplifiers having arbitrary numbers of signals and pumps of arbitrary power levels and propagation directions. Pdf black box model of erbiumdoped fiber amplifiers in c. In this paper we analyze gain and noise figure of a c and an l band edfa verifying experimentally the behavior of the involved parameters as a function of. The pump current of the erbiumdoped fiber amplifier is adjustable through the instruments front panel, allowing the user to vary the gain and output power of the amplifier. Design and compact modeling of saturated erbiumdoped fiber. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. This invention relates to an erbium doped fiber amplifier having improved operating characteristics. It provided new life to the optical fiber transmission that allow high bitrate and dense wavelength division multiplexing over ultra longhaul terrestrial and submarine optical communication networks operating at the principal telecom window around 1550 nm.
This probably explains why the first investigations were made on fiber lasers for which phb effects add up during successive round trips and have a measurable influence on the laser output. A comparison is made for both forward and bidirectional pumping over a wide range of pump powers. One of the major events in the history of optical telecommunications is the advent of erbiumdoped fiber amplifier edfa. 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.
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. Established methods of modeling erbium amplifiers can be used to model. Produces a maximal length pseudorandom binary sequence and electrical signal generator. Rare earth doped fiber amplifiers are finding increasing importance in optical communications systems. Modeling and characterization of cladding pumped erbium. Model simulation simulation model formed by the combination of prbs pattern generator, electrical signal generator, optical combiner, non linear fiber, edfa erbium doped fiber amplifier and optical filter. Fiber lasers were first operated in nddoped glass fibers, but the fiber laser of major current interest is the erbiumdoped fiber laser operating at 1.
Detailed design analysis of erbiumdoped fiber amplifiers dtu orbit. Analytical method for fewmode erbium doped fiber amplifiers xiangwei chen, baojian wu, yanqiu xie, feng wen and kun qiu key laboratory of optical fiber sensing and communications, ministry of education, university of electronic science and technology of china, chengdu, sichuan 611731, peoples republic of china email. Wideband gain flattened hybrid erbiumdoped fiber amplifier. The fiber is available in two variants, ag980h and ag980l. Erbiumdoped fiber amplifiers edfa are one of the most widely used optical amplifiers in the field of optical communications and fiber lasers. Theoretical modeling of erbiumdoped fiber amplifiers pumped. Pdf analytic modeling of erbiumdoped fiber amplifiers. We present a detailed study of a set of models for characterizing the gain, the input and output powers of single erbiumdoped fiber amplifiers edfas and networks of edfas. Perhaps the most important version is erbium doped fiber amplifiers edfas due to their ability to amplify signals at the low loss 1. Analytical method for gain in erbium doped fiber amplifier.
A fiber amplifier with a yongdan hu small signal net gain of 41 db at 1535 nm and 21 db over the full cband gualtiero nunziconti is demonstrated using a newly developed 8cmlong erbiumdoped arturo chavezpirson phosphate fiber. We show the penalty due to reduced inversion near the core boundary is negligible, while the reduced amplifier length can improve performance. The present invention discloses a method for measuring the gain and noise coefficients of the erbiumdoped optical amplifier. Claddingpumped erbiumdoped multicore fiber amplifier.
Analytic modeling of highgain erbiumdoped fiber amplifiers. Erbium doped fiber amplifiers is a bonafide work done by mr. Written by one of the pioneers in the field, this unique reference provides researchers, engineers, and system designers with detailed. Erbiumdoped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium. This fiber laser can be spliced into a normal transmitting optical fiber, and when optically pumped with a semiconductor laser at either 980 nm or 1. The first implementation of active fiber optic amplifier was demonstrated in 1994 with erbiumdoped fiber amplifier edfa. Temperature dependent gain analysis of a cascaded cband edfa. 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. Theoretical models based on the rate equations, therefore, were developed to predict the performance of such amplifiers. In section ii, we introduce the model of the erdoped and erybcodoped amplifiers.
Analytical formula for the transient response of erbiumdoped. Pdf analytic modeling of erbiumdoped fiber amplifiers on. Olson technology oteacob series instruction manual pdf. The performance of compact multimode pumped erbium sergio b. Edfa and fra parameters used in the hybrid amplifier modeling. The signal journal of light wave technology letteres, vol. Noise performance of erbiumdoped fiber amplifiers with. Oct 01, 1989 theoretical modeling of erbiumdoped fiber amplifiers with excitedstate absorption. In addition, remote control of the pump current is supported by sending serial commands via a usb 2. Basing on the numerical model proposed by abedin et al. Diminution of ase noise in erbium doped fiber amplifiers with.
The core of the fiber is doped with erbium and is typically pumped with 980 or 1480 nm to produce gain around 1550 nm cband or 1590 nm lband. Modeling erbiumdoped fiber amplifiers ieee journals. The timedependent behavior of erbiumdoped fiber amplifiers edfas and the networks of edfas is of. Mendes doped phosphate fiber amplifiers is presented. With the inventive amplifier, a gain of 37 db and a saturation power of 11. Analytical method for fewmode erbium doped fiber amplifiers.
Pdf evaluation of theoretical model for erbiumdoped silica. A model of erbiumdoped fiber amplifier gain dynamics. Us6381560b1 methods of modeling erbium doped fiber. 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. Cn101174896a method for measuring gain and noise factor of. The goal of this thesis is to provide a numerical model for edfas and verify its validity through experimental measurements. The time dependent gain is described by a single ordinary differential equation for the average inversion level of an edfa with arbitrary number of signal channels with arbitrary power levels and propagation directions. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiers the first book to integrate the most influential current papers on this breakthrough in fiber optics technology. Modeling of gain and noise in erbiumdoped fiber amplifiers.
A spatialmode model of erbiumdoped fiber amplifier edfa gain dynamics is presented. Pdf design optimization for efficient erbiumdoped john. Compra tu kindle aqui, or download a free kindle reading app. Optical amplifiers, edfa, erbium doped fiber, gain, noise. Erbiumdoped singlemode fiber amplifiers for the traveling wave amplification of 1. Doped fiber amplifier and fiber laser file exchange. Using an accurate and comprehensive computer model, we study the pump wavelength dependence of amplifier performance in the 800 nm band in erbiumdoped fiber amplifiers.
Modeling light amplification in erbiumdoped singlemode fibers. Gain modeling of erbiumdoped fiber amplifiers pumped at. Analytic modeling of erbiumdoped fiber amplifiers based on intensitydependent overlapping factors. In section iii, a single core erbiumytterbium doped fiber eydf and a singlecore erbium doped fiber edf are fabricated and characterized. Introductionerbiumdoped fiber amplifiers are devices that offer potential applications to optical fiber communications with analog or digital signals. Jan 01, 2012 according to theoretical model by giles and desuvire model, the propagation of light and the generation of amplified spontaneous emission ase in an erbium doped fiber amplifier are given by the following equations. A method of modeling erbium doped fiber edf for use in erbium doped fiber amplifiers edfa. Fibers with confined erbium doping are completely characterized from easily. Model oteacobxxx1x one, two or fouroutput 1550nm erbium doped fiber amplifier is a 1ru rack mount edfa package containing up to four 4 identical 16dbm optical outputs. The gain and noise performance are then examined under forward and reverse pumping. The edf has a length and a fractional population density of erbium ions in an excited state. In pumping at 980 nm, it is required to form a system model with three energy levels. Supplemental materials errata sheet available for downloading from ftp site. The model includes radial distribution of dopant and modal intensity in the optical fiber.
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