论文部分内容阅读
采用钛宝石飞秒激光器输出的一部分光抽运光子晶体光纤以产生超连续光谱,作为抽运光和斯托克斯光,另一部分飞秒激光作为探测光,并结合时间延迟方法,建立超连续光谱激发时间分辨相干反斯托克斯拉曼散射(CARS)实验系统,测试了具有较宽拉曼光谱的二甲基亚砜样品.实验结果表明,所建立的实验系统能有效抑制非共振背景噪声,并且通过一次测量,即可获得二甲基亚砜在690—3200cm-1范围内的CARS光谱信息,获得的二甲基亚砜CARS光谱范围达到2500cm-1.同时给出了所采用的光子晶体光纤光谱展宽的实验结果.
A portion of the light output by a Ti: FeSb laser emits a photonic crystal fiber to generate a supercontinuum spectrum, which is used as pumping light and Stokes light, and another part of the femtosecond laser light is used as a probe light. In combination with the time delay method, a supercontinuum Spectral excitation time-resolved coherent anti-Stokes Raman scattering (CARS) system was used to test samples with a wide range of Raman spectra. The experimental results show that the established experimental system can effectively inhibit the non-resonant background Noise, and CARS spectrum information of dimethyl sulfoxide in the range of 690-3200cm-1 can be obtained through one measurement, and the obtained dimethyl sulfoxide CARS spectral range reaches 2500cm-1. At the same time, Experimental results of spectrum broadening of photonic crystal fibers.