摘要
本文模拟熔石英芯光子晶体光纤(PCF)的色散性质,并利用慢变包络近似的标量波理论计算中心波长800.9nm的飞秒激光脉冲在两种不同色散性质的PCF中传输产生的超连续频谱,比较分析了阶色散、自变陡和脉冲内拉曼散射对超连续谱特性的影响,考虑以上因素,设计出相干反斯托克斯散射(CARS)共焦显微成像需要的超连续光源。
The dispersion features of photonic-crystal fibers（PCF） are numerically simulated and the effect of parameters of PCF on its dispersion is obtained in this paper.Then the nonlinear propagation in photonic-crystal fibers of femtosecond laser pulses with center wavelength in 800.9nm is investigated theoretically.Finally supercontinuum generation in two kinds of PCF with different zero-dispersion wavelengths when the femtosecond laser pulses propagate in the fibers＇s anomalous dispersion regime is analysed,taking high-order dispersion,self-steepening and Raman scattering into account.
基金
教育部博士点基金(20030055022)
国家自然科学基金(60477009)
天津市自然科学基金(07JCZDJC05500)
关键词
非线性光学
超连续谱
光纤色散
光子晶体光纤
CARS
拉曼散射
nonlinear optics
supercontinuum spectra
fiber dispersion
photonic-crystal fiber
CARS
Raman scattering
