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光谱超连续展宽 (SC)在光通信中有重要的应用。对色散位移光纤 (DSF)中 SC的产生及泵浦和 SC光纤参数对SC特性的影响进行了理论与实验研究。结果表明 :在 DSF中 ,SC的产生是自相位调制、四波混频、交叉相位调制效应综合作用的结果 ,其中自相位调制效应起先导作用。泵浦脉冲的波长与光纤零色散波长之间的距离影响 SC的宽度和平坦性。获得的 10 GHz的最宽 SC谱达 80 nm ,获得的平坦度 3d B的 SC谱宽度达 2 0 nm。采用光纤光栅进行了 SC谱平坦处理 ,使 SC谱的平坦度提高了至少 8d B。
Spectral supercontinuum (SC) has important applications in optical communications. The effects of SC generation and pump and SC fiber parameters on SC characteristics in DSF are theoretically and experimentally studied. The results show that in the DSF, the generation of SC is the result of the combined effects of self-phase modulation, four-wave mixing and cross-phase modulation. The self-phase modulation effect plays a leading role. The distance between the pump pulse’s wavelength and the zero-dispersion wavelength of the fiber affects the width and flatness of the SC. The broadest SC spectrum at 10 GHz was obtained at 80 nm, and the obtained spectral width at 3d B was 20 nm. The SC spectrum was flattened by fiber gratings, which increased the flatness of SC spectrum by at least 8d.