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This paper describes the self-filtering effect which appears in concatenated erbium-doped fiber amplifier (EDFA) systems. Employing a theoretical model we observed how the self-filtering wavelength is affected by the variation of some EDFA parameters, such as gain, fiber composition, pump wavelength and temperature. By a recirculating loop experiment which simulates a concatenated repeater transmission system, we measured the evolution of the amplified spontaneous emission (ASE) spectra with the number of circulations, and with the loss of the loop. We found a good agreement between the theoretical simulations and the experiments 相似文献
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Desthieux B.M. Ramos J. Hervo J. Bertaina A. Gasca L. Le Sergent C. Beylat J.-L. 《Electronics letters》1996,32(24):2214-2216
The authors demonstrate that single stage phosphorus-aluminium-codoped EDFAs greatly increase the usable spectral bandwidth for long-haul submarine applications. With such an amplifier, a total gain excursion of 5 dB was measured for eight WDM channels spanning 11 nm, with a total power budget of 1150 dB 相似文献
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