摘要
以波动方程和受激拉曼散射(SRS)物质方程为基础,采用光种子法,建立了固体相干反斯托克斯拉曼频移器的归一化耦合波方程,研究了晶体中反斯托克斯光转换效率。在脉冲抽运条件下分析了归一化增益系数G、归一化相位失配系数ΔK以及一阶斯托克斯光种子的归一化光场振幅ψs0三个变量对固体相干反斯托克斯拉曼频移器的影响,并作出了一系列相应曲线,由所得曲线估算了各归一化变量的合理取值范围。分析结果表明,在ΔK=0时,通过增大sψ0来打破拉曼增益抑制的影响,其转换效率峰值可达到44%。而当sψ0较弱时,可选取合适的相位失配系数,反斯托克斯光转换效率可达40%。
Based on the wave equation and stimulated Raman scattering （SRS） material equations, the normalized coupled-wave equations for solid-state coherent anti-Stokes Raman shifters are deduced by Stokes seed method to research the anti-Stokes conversion efficiency. The numerical calculations are carried out to illustrate the effects of variables on the performance of solid-state coherent anti-Stokes Raman shifters in the pulse pumping regime, and several curves are generated. These variables include the normalized Raman gain G, the normalized phase mismatch AK and the normalized amplitude of the Stokes seed beam q2s0 ~ The values of these variables are estimated from these curves. The results show that the highest anti-Stokes conversion efficiency of 44 % can be achieved by enhancing ￠so when phase is matched. The anti-Stokes conversion efficiency of 40% can be achieved with the weak Stokes seed beam when the proper phase mismatch is chosen.
出处
《激光与光电子学进展》
CSCD
北大核心
2011年第7期104-109,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(60778012)
国家自然科学基金(10974168)
山东省高校科技计划项目(J09LA06)
烟台大学教改项目资助课题
