Superfluorescent fiber source achieving multisignal power equalization in distributed fiber Bragg grating sensing

摘要: In order to achieve multisignal power equalization in a quasidistributed fiber Bragg grating (FBG) sensing system, an erbium-doped (EDF) superfluorescent source with high flatness and broadband spectrum is presented using three-stage double-pump configuration. The spectral protrusions the vicinity of 1532 1570 nm are flattened, which achieved by designing gain flattening filter long-period grating. result shows that output covering C L band, from 1526.52 1607.87 nm, less than 0.76 dBm. 3 dB bandwidth 75.68 13.11 mW band. By amplified spontaneous emission (ASE) FBG system for decreasing multisignals peak variation, standard deviation decreased 1.00 multiplexed ASE beneficial long-distance transmission, amplification, recognition, demodulation signals.