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受激拉曼散射是扩展激光波长的重要方法,但是气体中非线性光学过程对受激拉曼光的影响非常复杂,实验研究受激拉曼光与气体气压及拉曼池耦合透镜焦距的关系是实际应用受激拉曼光的重要手段。设计了受激拉曼实验装置及其测量系统,采用Nd:YAG激光器的四倍频激光266 nm作为抽运源,活性气体(H2、D2及H2/D2混合气体)分别被密封在长为100 cm的拉曼管中,输出的拉曼激光由棱镜分光后用能量计采集保存用以研究拉曼散射特性。给出了H2、D2及H2/D2混合气体的各级Stokes和反Stokes受激拉曼激光能量与气体气压及透镜焦距的关系。获得了217.84~447.15 nm之间的12条激光谱线,有效地扩展了拉曼激光的应用范围。研究结果对气体受激拉曼光的实际应用具有十分重要的价值。
Stimulated Raman scattering is an important method to extend the laser wavelength. However, the nonlinear optical process in gas has a very complex effect on stimulated Raman light. The relationship between stimulated Raman light and gas pressure and the focal length of the Raman cell coupling lens Is an important means of practical application of stimulated Raman light. A stimulated Raman experimental apparatus and its measurement system were designed. The laser was excited by 266 nm laser of Nd: YAG laser, and the active gas (H2, D2 and H2 / D2 mixed gas) was sealed in a length of 100 cm Raman tube, the output of the Raman laser spectroscopy by the energy meter collection save for studying Raman scattering characteristics. The relationship between Stokes and anti-Stokes stimulated Raman laser energies, gas pressures and lens focal lengths of H2, D2 and H2 / D2 mixed gases is given. The 12 laser lines between 217.84 and 447.15 nm were obtained, which effectively extended the application range of Raman laser. The research results are of great value to the practical application of gas-stimulated Raman light.