色散平坦光纤中的超连续谱  

Generation of Ultra-Broad-Band Supercontinuum Spectrum in a Dispersion-Flattened Fiber

作　　者：贾东方[1] 王永强[1] 王肇颖[1] 倪文俊[1] 林冉[1] 丁永奎[1] 李世忱[1] 

机构地区：[1]光电信息技术科学教育部重点实验室

出　　处：《天津大学学报（自然科学与工程技术版）》2005年第5期381-384,共4页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(69877012)

摘　　要：利用光纤中的超连续(SC)谱展宽技术,能够在很宽的光谱范围内同时获得多个高重复率、多波长超短脉冲,是一种有效的超短脉冲光源产生方法.本文利用重复频率为13.9MHz,脉宽1.5ps的超短脉冲泵浦色散平坦光纤(DFF),在三阶非线性效应(自相位调制、交叉相位调制、受激喇曼散射)和色散联合作用下得到总宽度510nm以上的SC光谱,并在宽150nm的谱段内获得不平坦度小于±0.25dB,且覆盖全部L波段的SC谱;用可调谐滤波器在此区段谱切片滤波,并得到脉宽基本相同的接近变换限的超短脉冲.Supercontinuum (SC) spectrum is a multiple wavelength source with high-repetition and uniform bandwidth, accurate wavelength spacing, high coherence and high-power spectral density. Experimentally, total 510 nm bandwidth SC and ±0.25 dB spectral uniformity over 150 nm were generated in a dispersion-flattened fiber which was produced by nonlinear effects (including SPM, XPM, SRS ) and group velocity dispersion(GVD). The fiber was pumped by 1.5 ps width ultrashort pulse with 13.9 MHz repetition rate utilizing a ring mode-locked fiber laser. The characteristics of the pulses which were filtered out from supercontinuum spectrum by tunable filter were studied. Most of them were transform limit pulse.

关 键 词：超连续谱 色散平坦光纤 锁模光纤激光器 

分 类 号：TN25[电子电信—物理电子学]