High-gain integrated in-line few-mode amplifier enabling 3840-km long-haul transmission  

作　　者：TAo Xu TIANYU GAO YANZE WANG WENHAO LI WEI LI CHENG Du ZHIQUN YANG YAPING LIU LIN ZHANG 

机构地区：[1]Key Laboratory of Opto-electronic Information Technology of Ministry of Education and Tianjin Key Laboratory of Integrated Opto-electronics Technologies and Devices,School of Precision Instruments and Opto-electronics Engineering,Tianjin University,Tianjin 300072,China [2]FiberHome Telecommunication Technologies Co.,Ltd.,Wuhan 430205,China [3]Peng Cheng Laboratory,Shenzhen 518038,China

出　　处：《Photonics Research》2022年第12期2794-2801,共8页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2019YFB2203902);National Natural Science Foundation of China(62105241)。

摘　　要：An integrated few-mode erbium-doped fiber amplifier(FM-EDFA)with high modal gain is suitable for the in-line amplification in mode-division multiplexing transmission(MDM)systems.We first experimentally demonstrate a dual-stage integrated FM-EDFA supporting three linear polarization modes.Consisting of integrated passive components with low insertion losses,the FM-EDFA has a similar structure and performance to widely used commercial single-mode EDFAs.The averaged modal gain of 25 dB,the differential modal gain(DMG)of<1.1 dB,and noise figures of 5–7 dB are simultaneously achieved.In addition,the DMG of the 3M-EDF itself is~0.3 dB.Moreover,an MDM transmission experiment with the in-line few-mode amplification by our proposed FM-EDFA over a 3840-km few-mode fiber link for a 28-Gbaud quadrature phase-shift keying(QPSK)signal is demonstrated.

关 键 词：AMPLIFIER EDFA fiber 

分 类 号：TN722[电子电信—电路与系统]