Abstract

Theoretical and experimental studies were conducted on providing conditions for the generation of multiple radiation components with a small wavelength spacing in a crystalline synchronously pumped SRS laser with combined frequency shift on high-frequency and low-frequency vibrational modes of an SRS-active crystal. A theoretical analysis has shown an important role of four-wave parametric Raman interactions on the low-frequency vibrational mode of the crystal provided the conditions of coherence and of nonlinear phase capture of such interactions are satisfied. For the first time, SRS generation was carried out at five closely spaced wavelengths of 1194, 1242, 1294, 1336, and 1396 nm in a SrMoO₄ crystal under synchronous pumping by a high intensity picosecond YAlO₃:Nd³⁺ laser at a wavelength of 1079 nm satisfying the condition of nonlinear phase capture.

中文翻译：

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SrMoO4 晶体中受激拉曼散射下小波长间隔斯托克斯辐射分量的多波长生成

摘要

进行了理论和实验研究，为晶体同步泵浦SRS激光器中产生小波长间隔的多个辐射分量提供条件，并结合SRS活性晶体的高频和低频振动模式的频移。理论分析表明，只要满足相干性和非线性相位捕获的条件，四波参量拉曼相互作用对晶体的低频振动模式具有重要作用。首次在 SrMoO _{4晶体中，在高强度皮秒 YAlO 3} :Nd ³⁺激光器同步泵浦下，在1194、1242、1294、1336 和 1396 nm 五个紧密间隔的波长下进行 SRS 生成。 1079 nm 满足非线性相位捕获条件。