Changren Qiu, Tianxin Yang, Dongfang Jia, Zhaoying Wang, Chunfeng Ge
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Gain equalization of FM-EDFA by optimizing ring doping and mode content of the pump with a genetic algorithm
We investigate gain equalization of a four-mode-group and six-mode-group erbium-doped fiber amplifiers with a genetic algorithm for mode division multiplexing transmission systems by optimizing rare earth dopant profile and pump modes powers, respectively. The optimizing gains are calculated to be > 28 dB between 1520 nm – 1565 nm with a maximum differential modal gain of ~ 2 dB among the mode groups only by optimizing the rare earth ring doping profile in the few-mode erbium-doped fiber.
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