用于相干反斯托克斯拉曼散射激发源的快速宽范围斯托克斯光波长调谐  

Wavelength Tuning of Stokes Optical Pulse with High Speed and Wide Range for Coherent Anti-Stokes Raman Scattering Excitation Source

作　　者：江俊峰[1] 吴航[1] 刘琨[1] 王双[1] 黄灿[1] 张学智[1] 于哲[1] 陈文杰[1] 马喆[1] 惠荣庆[2] 贾文娟[3] 刘铁根[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室,光纤传感研究所,天津300072 [2]堪萨斯大学电气工程与计算科学系,美国堪萨斯州劳伦斯66045 [3]国家海洋技术中心,天津300112

出　　处：《中国激光》2017年第1期159-166,共8页Chinese Journal of Lasers

基　　金：国家重大科学仪器设备开发专项(2013YQ030915);国家自然科学基金(61378043,61227011,61475114,61505139,11004150);国家863计划(2014AA093403);天津市自然科学基金(13JCYBJC16200);深圳市科技创新委员会项目(JCYJ20120831153904083)

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2m长的PCF,注入光脉冲的峰值功率为2.7kW时,可探测波数为3509cm-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0.165ms,对1.98m长的PCF注入峰值功率范围为0.108~2.517kW的光脉冲时,基阶孤子中心波长调谐范围为807~1064nm,理论可探测波数范围为432~3422cm-1。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.

关 键 词：激光器 光孤子自频移 波长调谐 相干反斯托克斯拉曼散射 光子晶体光纤 

分 类 号：O436[机械工程—光学工程]