光学精密工程2013，Vol.21Issue(2)：308-315,8.DOI:10.3788/OPE.20132102.308
硅拉曼激光器的设计与典型应用
Design and typical application of silicon Raman laser
摘要
Abstract
For the serious nonlinear optical loss, low output power density and non-flat light source in gas concentration measurement by a Cavity Ring-down Spectroscope(CRDS), a Raman laser by using Si as gain media was designed based on the nonlinear frequency shift mechanism of stimulated Raman scattering. To reduce the Two-photon Absorption (TPA) induced Free-carrier Absorption (FCA) and the FCA induced nonlinear optical loss in the silicon, a reversed p-i-n diode was designed to embed in a silicon waveguide. Then, the output power of Raman laser could be enhanced by controlling the voltage. In the experimental analysis, the reversed voltage was set to open, short, 5V and 25V, respectively, to observe the output power under the different voltages. The result indicates that the free carrier mobility time decreases from 16 ns to 1 ns and the output power increases outstandingly at the same condition, which enhances the reliability of gas concentration measurement.关键词
Si/拉曼激光器/气体浓度测量/光腔衰荡法/双光子吸收(TPA)/自由载流子吸收(FCA)Key words
Si/ Raman laser/ gas concentration measurement/ Cavity Ring-down Spectroscope (CRDS)/ Two Photon Absorption(TPA)/ Free-carrier Absorption(FCA)分类
信息技术与安全科学引用本文复制引用
李文超,张景茹,孙宇超,朱丹丹,李志全..硅拉曼激光器的设计与典型应用[J].光学精密工程,2013,21(2):308-315,8.基金项目
河北省自然科学基金资助项目(No.F2010002002,F2012203204) （No.F2010002002,F2012203204）
教育部高等学校博士学科点专项科研基金资助项目(No.20070216004) （No.20070216004）
