Experiments and simulation on the overall DMG of long-haul cascade FM-EDFA systems  

作　　者：江歆睿 武保剑 严伟 文峰 邱昆 Xinrui Jiang;Baojian Wu;Wei Yan;Feng Wen;Kun Qiu(Key Laboratory of Optical Fiber Sensing and Communications,Ministry of Education,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]Key Laboratory of Optical Fiber Sensing and Communications,Ministry of Education,University of Electronic Science and Technology of China,Chengdu 611731,China

出　　处：《Chinese Optics Letters》2024年第4期53-59,共7页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 62171078);the National Key R&D Program of China (No. 2018YFB1801003)。

摘　　要：All-fiber few-mode erbium-doped fiber amplifiers(FM-EDFAs) with isolation and wavelength division multiplexers(IWDMs)have been developed to enable flexible pumping in different directions. The FM-EDFA can achieve >30 d B modal gain with<0.3 d B differential modal gain(DMG). We experimentally simulate the DMG performance of a cascade FM-EDFA system using the equivalent spectrum method. The overall DMG reaches 1.84 d B after 10-stage amplification. We also build a recirculating loop to simulate the system, and the developed FM-EDFA can support transmission up to 3270 km within a 2 d B overall DMG by optimizing the few-mode fiber length in the loop.

关 键 词：mode division multiplexing few-mode erbium-doped fiber amplifier gain equalization 

分 类 号：TN722[电子电信—电路与系统] TN253