Kazuyou Mizuno, Yasuhiro Nishi, You Mimura, Yoshitaka Iida, Hiroshi Matsuura, Daeyoul Yoon, Osamu Aso, Toshiro Yamamoto, Tomoaki Toratani, Yoshimi Ono, An Yo
Abstract
德赢AC米兰官方合作伙伴 result of rapid increase of amount of traffic data and transmission rates in telecommunication, the wavelength division multiplexing (WDM) system has been studied. An erbium-doped fiber amplifier (EDFA) which is a key component in this system needs flat gain spectra. One of the gain-flattening technologies is usage of an optical gain-flattening filter that h德赢AC米兰官方合作伙伴 reverse loss profile against the gain profile of EDFA. We have developed a design method using nonlinear fitting upon an etalon-type gain-flattening filter, so we can design a gain-flattening filter that has less error against any gain spectra than conventional methods. Thereupon we have manufactured modules designed by the method, and we can get excellent performance upon gain-flattening filters. In this paper, we demonstrate the design method and report performances of several types of gain-flattening filters for optical amplifiers that have different gain spectra.
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