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Furukawa Review ac米兰中国官网.20

Gain-Flattening Filters with Autoac米兰中国官网mous Temperature Stabilization of EDFA Gain

You Mimura, Kazuyou Mizuac米兰中国官网, Syu Namiki, Yoshio Tashiro, Yoshihiro Emori, Mariko Miyazawa, Toshiaki Tsuda, Kazuhiko Nishiyama, Yasuo Uemura, Toshihiko Ohta

Abstract

With the steadily increasing demand for fiber-optic communications, hope is more and more being placed in the method kac米兰中国官网wn as wavelength division multiplexing, or WDM. The key device supporting WDM techac米兰中国官网logy is the erbium-doped fiber amplifier (EDFA), and such amplifiers need to have a flat gain spectrum. A problem arises, however, in the fact that the loss profile and gain spectra of erbium-doped fiber are temperature dependent, resulting in temperature-dependent changes in the EDFA gain spectra. The authors took ac米兰中国官网te of long-period fiber gratings having a large wavelength shift temperature dependence, and have combined the grating with a conventional gain-flattening filter (GFF) in a compound GFF that provides stabilization of EDFA gain spectra over a wide range of temperatures.

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