光纤参数对超连续频谱展宽影响的理论与实验研究

从理论上系统地研究了光纤参数对光纤中超连续（SC）谱展宽的影响，实验研究了光纤零色散波长对SC谱宽度的影响。利用非线性薛定谔方程对光纤中的超连续谱产生过程进行了数值模拟。研究结果表明，在超连续谱的展宽过程中，光纤长度、色散斜率、光纤非线性系数和损耗系数等参数对超连续谱有重要影响。为得到性能优良的超连续谱，必须对光纤参数进行优化。实验上采用三级压缩的增益开关DFB激光器作抽运源，色散位移光纤为非线性介质，获得了重复频率10GHz的SC超短光脉冲。研究结果为进一步优化超连续谱的性能奠定了基础。

Theoretical and Experimental Studies on the Influences of Fibers' Parameters on Supercontinuum Generation

The influences of the fiber parameters on supercontinuum generation are investigated theoretically.The influences of zero dispersion wavelength of fiber on bandwidth of supercontinuum spectrum are experimentally investigated.Supercontinuum generation procession in fiber is studied by solving nonlinear Schroedinger equation.The research results show that fiber length,dispersion slope,nonlinear coefficient and loss of the fiber play important rules on supercontinuum generation.To get supercontinuum spectra with good performances,the optimized design of fiber's parameters is necessary.Utilizing a three-stage compressed gain-switched DFB laser as pump source,and a dispersion-shifted fiber as the nonlinear material,an ultra-short pulse source with supercontinuum at repetition rate of 10 GHz are obtained.It provides basis for optimizing the performances of supercontinuum generation.