光纤中超连续谱产生的理论与实验研究  

Theoretical and experimental study of supercontinuum generation in optical fibers

作　　者：娄采云[1] 高以智[1] 王建萍[1] 韩明[1] 吴越[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第4期441-445,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目 ( 2 0 0 2 AA12 2 0 3 3 ) ;国家教育振兴计划

摘　　要：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。Supercontinuum (SC) properties are important in optical communication. The effects of pump power and wavelength on the generation dynamics of SC in dispersion shift fibers (DSF) were studied theoretically and experimentally. The results show that the SC generated in DSF is jointly induced by self phase modulation which broadens the entire response spectrum, by four wave mixing and by cross phase modulation, which boost the SC broadening. The SC band width and flatness are related to the difference between the pump wavelength and the zero dispersion wavelength. The SC spectrum has a 10 GHz repetition rate, an 80 nm bandwidth and a 3 dB flatness over a 20 nm spectral range. A two optical fiber grating series increases the SC spectrum flatness by more than 8 dB.

关 键 词：光纤通信 色散位移光纤 超连续谱 光谱超连续展宽 自相位调制效应 交叉相位调制效应 

分 类 号：TN929.11[电子电信—通信与信息系统]