Compact Size and High Output Power Er-doped Fiber Amplifier Modules Pumped With 1.48 µm MQW LDs

Abstract

Er-doped fiber amplifiers (EDFAs) are very attractive for applications to the near-future optical communication systems[1]. High output power of +20 dBm was already reported by using 1.48 µm pump LD modules [2]. Increasing the signal output power from EDFA will be one of the important issues for such uses as the booster amplifiers in long-haul transmission systems and in optical distribution network systems.