摘要
以理论和实验相结合的方法对光子晶体光纤中超连续谱产生的蓝移光谱进行了研究.实验研究了超连续谱蓝移光谱随入射激光的功率的变化,着重分析了光谱在短波方向展宽的机制.结果表明:在入射激光功率较低的情况下,利用包含色散、自相位调制、自变陡及脉冲内拉曼散射效应的非线性薛定谔方程可以准确地分析光谱的展宽情况,理论和实验结果一致;但是,当功率较高时,光谱展宽的蓝移部分理论和实验结果出现差别.因此,在理论和实验的基础上讨论了四波混频及交叉相位调制效应对超连续谱产生的影响,从而为超连续谱在短波方向的展宽提供了很好的实验和理论依据.
Blue-shifted spectra of supercontinuum generation in photonic crystal fibers are studied theoretically and experimentally.The influences of input power on supercontinuum spectra generation are analyzed.The research results show that when the power of the laser is low,the theoretical results obtained by the nonlinear Schrodinger equation including self-phase modulation,self-steeping and intrapulse Raman scattering agree with the experimental results.However,when the power of the laser is high,the theoretical and experimental blue-shifted spectra are different.Therefore,the influences of the cross phase modulation and four-wave mixing effects on the supercontinuum generation are discussed,which provide the mechanism for the bule-shifted spectra of supercontinuum generation.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2010年第11期1938-1942,共5页
Acta Photonica Sinica
基金
国家重点基础研究发展计划(2007CB310403)
国家自然科学基金(60772105
10704043)
天津市自然科学基金重点项目(10JCZDJC15200)
教育部博士点基金(20090031110033)资助
关键词
超连续谱产生
光子晶体光纤
蓝移光谱
四波混频
Supercontinuum generation
Photonic Crystal Fiber（PCF）
Blue-shifted spectra
Four-wave mixing
