Power requirements for erbium-doped fiber amplifiers pumped in the 800, 980, and 1480 nm bands (original) (raw)
Related papers
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.
Erbium-doped fiber amplifier pumped in the 950-1000 nm region
IEEE Photonics Technology Letters, 1990
We report the pump wavelength dependence of the gain of an erbium-doped fiber amplifier pumped in the wavelength region 950-loo0 nm. It is found that efficient gain at 1.557 pm, between 25 and 28 dB for 17 mW of launched pump power, can be obtained for any wavelength pump in the range 965-985 nm. The optimum length of erbium fiber needed is found to vary as a function of pump wavelength. The gain as a function of signal wavelength is also investigated at these pump wavelengths.
Gain and noise properties of small-signal erbium-doped fiber amplifiers pumped in the 980-nm band
IEEE Photonics Technology Letters, 2000
We have experimentally and theoretically investigated the effects of detuning the pump wavelength on the gain and noise properties of small-signal, erbium-doped fiber amplifiers co-directionally pumped in the 980-nm band. While the pump wavelength can be varied over a wide range with little impact on the gain, a noise penalty is incurred. For amplifiers saturated by amplified spontaneous emission, it is possible to increase the gain by detuning the pump wavelength.
IEEE Photonics Technology Letters, 2005
With a view to improve the power level and brightness of semiconductor pump lasers, we have resorted to a scalable implementation and achieved spectral beam combining through a low-quality-factor external cavity. For that purpose, a high-power single-mode laser array emitting up to 2.1 W at 3.2 A at 980 nm has been realized, which delivers 1.5 W in external cavity. A power of 0.66 W was finally coupled into the single-mode fiber, with a coupling efficiency of 44%. Pumping experiments of an erbium-doped fiber amplifier utilizing this laser have demonstrated efficiency and noise characteristics similar to what is usually obtained with conventional sources, with the noteworthy advantage of a lower gain excursion over the-band.
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.
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.
Design optimization for efficient erbium-doped fiber amplifiers
IEEE/OSA Journal of Lightwave Technology, 1990
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.
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 ...
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.