Design optimization for efficient erbium-doped fiber amplifiers (original) (raw)
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Performances of Erbium-Doped Fiber Amplifier at 980-nm Pump Power in Various Parameter Combinations
Applied Physics Research, 2015
Optical fiber amplifiers are dominating the loss compensation in fiber optic communications systems, especially the Erbium doped types for communication spectrum based on silica fibers. The gain of the EDFA can be maximized by using appropriate design parameters and appropriate value of the material properties. This paper describes the derivation of the equations that govern the pump power, input signal propagation, gain and optimum fiber length of the amplifier. By using these deduced expressions, new tools have been developed using C programming and MATLAB and then the performances of EDFA pumped with 980-nm signal have been analyzed. The analysis results that the gain of the amplifier increases with the length of the amplifier, and also with the pump signal power. At higher values of signal power the gain becomes saturated. The gain has a nonlinear relation with the amplifier length for a particular pump power. From the experiments, it has been found that for a particular length the saturation gain increases with the carrier density of the amplifier, but at longer length the gain is almost independent of the carrier density. It has also been found that the pump threshold power increases linearly with the length and carrier density of the amplifier. The tools developed in the analysis process could be used by researchers in future for further investigation of the performance of EDFA in various parameter sets or, for finding a parameter set for specific target performance of the EDFA.
Intensity based erbium distribution for erbium doped fiber amplifiers
Optical and Quantum Electronics, 2007
A method to calculate an optimum Erbium distribution to enhance the gain efficiency in EDFA is proposed. This method calculates Erbium distribution based on optical pump envelop, pump power and optical properties of Erbium ion. The intensity-based Erbium distribution is obtained for single-mode fiber and dispersion-shifted fiber types EDFA for pump power from 10 to 40 mW. All of the profiles have a Gaussian-like shape. For single-mode fiber type EDFA, high gain enhancement is obtained in a relatively short optimal length of fiber. Optimal length of EDFA, using intensity-based Erbium distribution, is increased by a factor of 1.5-3 with respect to the one using stepwise. This optimal length increasing factor is considerably smaller than that of the EDFA, using the one-fourth confinement Erbium profile.
Detailed design analysis of erbium-doped fiber amplifiers
Photonics Technology …, 1991
INTRODUCTION HE erbium-doped fiber amplifier has much potential as a T high-gain optical amplifier in optical communication sys- ... MODEL The model for the EDFA, used in the analysis, assumes that the Er3+-ions acts as a 3-level laser system when pump-ing at ...
Gain optimization of erbium doped fiber amplifier under dual pumping at 830 nm and 980 nm
The International Conference on Advances in Electrical Engineering, 2019
Various pumping configurations of optical amplifiers using Erbium Doped Fiber (EDF) are investigated at two pumps of 830 nm and 980 nm. The observation includes comparison between single pumping and dual pumping schemes, by varying fiber length and pump power, the gain and noise characteristics are examined. The determination of optimum length of EDF is ~10 m through investigating gain characteristic under single pumping scheme. With this length of EDF, the pump powers are selected as 100 mW of 830 nm and 150 mW of 980 nm wavelength. The observation indicates that 100 mW of 830 nm pump has gain of ~ 11 dB and noise figure below-10 dB for both single pumping schemes. On the other hand, 150 mW pump power of 980 nm has a lower noise figure at forward pumping scheme. Hence, for high and flat gain with tolerable noise effect, with an EDF length of 10 m, it is preferable that 150 mW of 980 nm pump laser is to set in the forward part and 100 mW of 830 nm pump is to set in the backward part in the dual pumping configuration.
Detailed theoretical and experimental investigation of high-gain erbium-doped fiber amplifier
IEEE Photonics Technology Letters, 1990
A full scale numerical model for the erbium-doped fiber amplifier has been developed, incorporating realistic index and erbiumconcentration profiles as well as the spectral distribution of amplified spontaneous emission. The high accuracy of the model is demonstrated by comparison with a comprehensive set of data, including gain, ASE, and pump power, obtained for a well characterized Er-AI-doped fiber. An absorption to emission cross section ratio of 1.0 was measured at the gain peak. Pumping at 654 nm, the excited state absorption was observed to be insignificant. A high gain of 39.6 dB was achieved in the experiment.
2017
© 2017 Akanksha Tiwari et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. Analysis of Gain Characteristic of Erbium Doped Fiber Amplifier (EDFA) with Pump Power and Fiber Length
Gain And Noise Figure Performance Of Erbium Doped Fiber Amplifiers (EDFA)
Matlab to characterize Gain, Noise Figure and ASE power variations of a forward pumped EDFA operating in C band (1525-1565 nm) as functions of Er 3+ fiber length, injected pump power, signal input power and Er 3+ doping density. The program solves the rate and propagation equations numerically and shows the results graphically. Thus, Gain and Noise Figure performance of an EDFA given with its physical parameters can be graphically obtained or the required physical parameters of an EDFA with desired operating performance can easily be optimised.
Design optimization for efficient erbium-doped
IEEE/OSA Journal of Lightwave Technology, 1991
The exact gain shape profile of erbium doped fiber amplifiers (EDFA`s) are depends on fiber length and Er 3 ion densities. This paper optimized several of erbium doped fiber parameters to obtain high performance characteristic at pump wavelengths of λ p = 980 nm and λ s = 1550 nm for three different pump powers. The maximum gain obtained for pump powers (10, 30 and 50mw) is nearly (19, 30 and 33 dB) at optimizations. The required numerical aperture NA to obtain maximum gain becomes less when pump power increased. The amplifier gain is increase when Er +3 doped near the center of the fiber core. The simulation has been done by using optisystem 5.0 software (CAD for Photonics, a license product of a Canadian based company) at 2.5 Gbps.
Optics Letters, 1989
An efficient erbium-doped fiber amplifier providing gains from +25 to +37 dB with pump powers at X = 1.49 ,um in the 11-54-mW range is described. Corresponding saturation output powers of +2.5 to +11 dBm were achieved. A maximum gain coefficient of 2.1 ± 0.1 dB/mW was measured, which is to our knowledge the highest value reported for erbium-doped fiber amplifiers pumped near X = 1.49 ,um and matches previously reported results for a X = 980nm pump.
GAIN AND NOISE FIGURE ANALYSIS OF ERBIUM DOPED FIBER AMPLIFIERS
Erbium doped fiber amplifier (EDFA) performance is dependent on several factors such as fiber length, pump power, Er3+ concentration. This paper involves the simulation of an EDFA using Optisystem and analyzes the gain and noise figure of EDFA in the Conventional band in terms of pump power and fiber length. The gain increases initially with the pump power when the length is fixed and then it decreases. The gain also increases with the length when pump power is fixed and decreases after reaching a maximum. Whereas the noise figure increases with length and decreases with pump power.