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中文摘要：
提出了基于液晶相位延迟的用于相干反斯托克斯拉曼散射（CARS）激发源的斯托克斯光的快速宽范围波长电调谐方法。数值仿真分析了脉冲的峰值功率和光子晶体光纤（PCF）长度对光孤子自频移（SSFS）频移量的影响, 计算结果表明对2 m长的PCF, 注入光脉冲的峰值功率为2.7 kW时, 可探测波数为3509 cm^-1。基于液晶相位延迟器构建了快速波长调谐装置并搭建了实验系统, 实验结果表明波长切换响应时间可达0.165 ms, 对1.98 m长的PCF注入峰值功率范围为0.108~2.517 kW的光脉冲时, 基阶孤子中心波长调谐范围为807~1064 nm, 理论可探测波数范围为432~3422 cm^-1。
英文摘要：
An approach for wavelength tuning of Stokes optical pulse with high speed and wide range for coherent anti-Stokes Raman scattering （CARS） excitation source is presented based on the liquid crystal phase retardance. Influences of the photonic crystal fiber （PCF） length and optical pulse peak power on the frequency shift resulting from the soliton self-frequency shift （SSFS） are analyzed through the numerical simulation. Result shows that when an optical pulse with peak power 2.7 kW is launched into a 2 m PCF, the detectable wavenumber is 3509 cm^-1. A fast wavelength tuning module is constructed with a liquid crystal variable retarder, and then the experiment setup is established. Experimental results show that the response time of wavelength switching can reach 0.165 ms. Tuning range of the central wavelength of the first order soliton is from 807 nm to 1064 nm when the optical pulse peak power with a range from 0.108 kW to 2.517 kW is launched into a 1.98 m PCF, and the theoretical detectable wavenumber will range from 432 cm^-1 to 3422 cm^-1.
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Wavelength-division-multiplexing method of polarized low-coherence interferometry for fiber Fabry&nd
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