首页|Experiments and simulation on the overall DMG of long-haul cascade FM-EDFA systems
Experiments and simulation on the overall DMG of long-haul cascade FM-EDFA systems
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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 dB modal gain with＜0.3 dB 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 dB after 10-stage amplification.We also build a recir-culating loop to simulate the system,and the developed FM-EDFA can support transmission up to 3270 km within a 2 dB overall DMG by optimizing the few-mode fiber length in the loop.
Key Laboratory of Optical Fiber Sensing and Communications(Ministry of Education),University of Electronic Science and Technology of China,Chengdu 611731,China
National Natural Science Foundation of ChinaNational Key R&D Program of China
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