连续调谐波导型H_2受激振动喇曼散射的研究

设计和研制了一台石英毛细管波导型H_2喇曼池,用450nm染料激光研究了H_2的受激振动喇曼散射,测定了一阶Stokes波输出能量与H_2气压之间的依赖关系。最高能量转换效率为20％。用Oxazine-1染料激光作泵浦源获得三阶Stokes信号,得到的红外喇曼散射最长波长达6.57μm。     

四氯化碳的背向受激喇曼散射研究

用倍频Ｎｄ：ＹＡＧ锁模激光５３２ｎｍ泵浦ＣＣｌ４的背向受激喇曼散射，一阶斯托克斯谱线５４６ｎｍ的能量转移效率为１３％，脉宽（ＦＷＨＭ）为８ＰＳ，比泵浦激光５３２ｎｍ的脉宽４０ＰＳ明显变窄。     

利用受激喇曼散射稳定超短光脉冲能量

本文报道利用受激喇曼散射稳定超短光脉冲的新颖方法。实验上得到能量涨落比泵浦光小得多的高稳定性前向一阶斯托克斯光。并给出定性理论分析。     

Na蒸气中双支受激超喇曼散射的观察

首次同时观察到共振Na4D态激励时,3S→4P_(3/2),4P_(1/2)双支受激起喇曼散射,并同时观测到与之级联的4P-4S等双支原子跃迁谱线.     

受激喇曼散射光环形成的观察

观察并分析了H_2中受激喇曼散射光斑图形.光斑的分布形状与焦点处功率密度有关,并且与总体转换效率有关.     

YAG激光泵浦光纤产生受激喇曼散射

本文利用YAG激光泵浦光导纤维产生受激喇曼散射,并利用所摄取的受激喇曼光谱图定出斯托克斯线波长,计算样品的喇曼频移,对实验中所观察到的现象进行分析讨论。     

液氮的受激喇曼散射研究

本文使用染料测Q红宝石激光激励液氮的受激喇曼散射，观察到一级斯托克斯、一级反斯托克斯和二级反斯托克斯线，测得散射光的喇曼频移、线宽、能量转换率和退偏振度等参数．并对所得结果进行了讨论。     

乙醇溶液中瞬态受激喇曼散射动力学过程的实验研究

本文报道了用于研究乙醇溶液中瞬态受激喇曼散射动力学过程的实验装置和实验结果,并与Carman的理论计算模型进行了比较,结果基本符合。在最佳参量运转时获得了脉宽～310fs的喇曼散射光,其脉宽比泵浦光压缩了～80倍。     

液芯波导对溶液拉曼光谱探测灵敏度的放大

采用折射率比石英(1．46)低的Teflon-AF(n=1.29)液芯波导系统。研究了乙醇和四氯化碳溶液的拉曼光谱，通过利用液芯波导的内全反射特性。延长激发光对波导管内的溶液试样的总的有效激发光程。并有效增强对光谱信号的收集，成功地采集到四氯化碳和乙醇的拉曼光谱。并与采用常规90度几何散射结构获得的拉曼光谱进行了对比，表明液芯波导系统可以使拉曼光谱信号强度增强200倍以上，并大大提高探测灵敏度和信噪比。展示了液芯波导拉曼光谱应用于化合物溶液的微量分析、生物医药成分的定量检测、临床医学诊断中对病理样本的微量分析和定量检测等领域的可行性，为进一步采用液芯波导拉曼光谱进行定量标定的研究工作和实际应用提供了实验依据。这项技术也适合于对其它包含多种成分的复杂的生物体系和化学药品进行定量分析，具有巨大的应用前景和实际价值。     

Stimulated Raman effect and four-wave mixing in a hollow waveguide

A theoretical and experimental investigation of stimulated Raman scattering and four-wave mixing in a gas-filled hollow waveguide was performed. The four-wave mixing processes, specifically the generation of the third Stokes component at ω₃ when ω₃ =2ω₂-ω₁, show a strong resonance-like behavior as a function of wavelength. These resonances are caused by the phase matching required for efficient four-wave mixing, because the hollow waveguide supports only certain propagation directions leading to the development of waveguide modes. The theoretical results are compared with experimental data for TEM₀₀ and TEM₁₀ fundamental dye-laser beams generating third Stokes wavelengths between 2.6 and 7.5 μm     

Stimulated Raman scattering in quartz

Stimulated Raman scattering (SRS) from infrared-active phonons in quartz is discussed. The scattering is concluded to be from a different region ofkspace than that previously stated in the literature. The possibility of producing a broadly tunable parametric oscillator via SRS in quartz is viewed with pessimism.     

无固体窗口的受激拉曼放大器

研究了用气体折射率和密度与空气接近的无固体窗口受激拉曼散射放大管的拉曼放大特性 ,并研究了它对光束质量的影响。     

Stimulated vibrational Raman scattering in HD

This letter reports an observation of stimulated vibrational Raman scattering in HD gas. The Raman threshold data are compared to those of H2under similar conditions, and the difference in their gain coefficients is discussed.     

液态空气的受激喇曼散射

使用染料调Q红宝石激光器激发液态空气的受激喇曼散射(SRS),在0.5247～1.0256微米的范围内获得基本上等频差间隔的十三条辐射线。     

GdVO4晶体的受激拉曼散射

采用熔体提拉法生长出了高质量的a轴和c轴GdVO4单晶。测量了GdVO4晶体的室温透过光谱,结果表明GdVO4晶体的短波透过截止边为338 nm,长波透过截止边大于3000 nm,透过范围覆盖紫外、可见、近红外和部分中红外波段,因此可以在较宽波长范围内实现拉曼激光频移。研究了GdVO4晶体在532 nm和355 nm皮秒激光脉冲抽运下的受激拉曼散射(SRS)。采用腔外单次通过方式,获得了3级斯托克斯线(557.98 nm,586.86 nm,618.92 nm)和1级反斯托克斯线(508.01 nm),得到GdVO4晶体一级斯托克斯拉曼散射的稳态增益系数为26.6±0.2 cm/GW,二级斯托克斯拉曼散射的稳态增益系数为14.0±0.2 cm/GW,受激拉曼散射的整体转换效率达到43%。报道了GdVO4晶体355 nm激发的受激拉曼散射,观察到2级斯托克斯谱线(365.9 nm,378.1 nm),在此条件下测得一级斯托克斯谱线的拉曼增益高达114±9 cm/GW。     

化学激励钠原子相干反斯托克斯受激喇曼散射

本文采用小功率Ｈｅ－Ｎｅ激光及化学激励的方法，首次观察到了溶液中钠原子反斯托克斯受激喇曼散射谱线双频移效应，并讨论了它的产生条件。     

Stimulated Raman emission in infrared excited gases

Using the pressure dependence of absorption, absorption coefficients and detunings were measured for CO2pump lines and the strong fat infrared emission in optically pumped D2O. The P (32) CO2line was found to be detuned ∼1.5 GHz from the ν2band transitions6_{6}, 6_{5} rightarrow 5_{5}, 5_{4}. The resulting emission lines at 50.3 μm and 66 μm were found to be detuned from their respective transitions by about the same amount. On the basis of these measurements and gain estimates for the far infrared, the resulting emission lines are identified as stimulated Raman emission.