时间分辨相干反斯托克斯拉曼散射显微成像技术中光的干涉  

Interference in time-resolved coherent anti-Stokes Raman scattering microscopy

作　　者：刘伟[1] 刘双龙[1] 陈丹妮[1] 屈军乐[1] 牛憨笨[1] LIU Wei;LIU Shuang-long;CHEN Dan-ni;QU Jun-le;NIU Han-ben(College of Opto-Electronics Engineering Shenzhen University,Shenzhen Guangdong 518060,China;Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province Shenzhen Guangdong 518060,China)

机构地区：[1]深圳大学光电工程学院光电子器件与系统(教育部/广东省)重点实验室,广东深圳518060

出　　处：《电子显微学报》2017年第5期492-497,共6页Journal of Chinese Electron Microscopy Society

基　　金：国家重点基础研究发展计划(973计划)(No.2012CB825802);国家自然科学基金资助项目(Nos.61235012;61178080;11004136;60878053);国家重大科学仪器设备开发专项(No.2012YQ15009203);深圳市科技计划项目(Nos.JCYJ20120613173049560;GJHS20120621155433884)资助

摘　　要：时间分辨相干反斯托克斯拉曼散射显微成像技术中的泵浦光和探测光采用同一波长,可以很大程度上降低成像系统对光源的要求。采用振幅矢量叠加法理论上计算了波长相同的两束光经由物镜产生的双光束干涉,分析了产生的CARS信号强度波动的原因,并提出通过调整泵浦光与探测光的偏振方向相互垂直的方案消除干涉项,这样可以实现时间分辨CARS消除非共振背景的同时,保证产生的信号稳定。If wavelength of the pump and probe beam are the same in time-resolved coherent anti-Stokes Raman scattering microscopy,the requirements for the light source can be largely reduced.However,when the pump and probe beam with the same wavelength pass through the objective,the two beams will interference with each other on the focal plane of the objective,leading to the CARS signal intensity fluctuate drastically.Via adjusting polarization direction of the pump and the probe beam perpendicular to each other,the interference term is zero and the dramatically changes of the signal strength will be eliminated.Adjusting the polarization direction of the pump and probe beam can guarantee eliminating the non-resonant background in time-resolved CARS and the stability of the signal simultaneously.

关 键 词：相干反斯托克斯拉曼散射 时间分辨 非共振背景 光的干涉 偏振 

分 类 号：O436.1[机械工程—光学工程]