Papashvili Alexander G, Kochukov Yury A, Tereshchenko Dmitry P, Smetanin Sergei N, Kharitonova Polina D, Shukshin Vladislav E, Dunaeva Elizaveta E, Voronina Irina S, Ivleva Lyudmila I
Opt Lett. 2023 Sep 1;48(17):4528-4531. doi: 10.1364/OL.499428.
For the first time, to the best of our knowledge, we demonstrate highly transient, multiwavelength, single-pass Raman generation with combined frequency shifts on two Raman modes of an SrMoO crystal with high total Raman conversion efficiency of up to 48% in conditions of competition with self-phase modulation (SPM). A 58-mm-long SrMoO crystal was used as the active medium under pumping by the 1030-nm, 40-µJ laser pulses with controllable dispersive stretching in a range of 0.25-6 ps at negative and positive chirping. The pump pulse chirping was optimized for both high- and low-frequency Raman shifts on the primary (888 cm) and secondary (327 cm) Raman modes of the crystal. At the optimal conditions, four Stokes components of stimulated Raman scattering (SRS) radiation with high- and low-frequency Raman shifts at the wavelengths of 1066, 1134, 1177, and 1261 nm were efficiently generated.
据我们所知，首次在与自相位调制（SPM）竞争的条件下，我们展示了在SrMoO晶体的两种拉曼模式上具有组合频移的高度瞬态、多波长、单程拉曼产生，总拉曼转换效率高达48%。使用一块58毫米长的SrMoO晶体作为活性介质，在1030纳米、40微焦的激光脉冲泵浦下，在正负啁啾情况下，可控色散展宽范围为0.25 - 6皮秒。针对晶体的主要（888厘米）和次要（327厘米）拉曼模式上的高频和低频拉曼频移，对泵浦脉冲啁啾进行了优化。在最佳条件下，有效地产生了波长为1066、1134、1177和1261纳米的具有高频和低频拉曼频移的受激拉曼散射（SRS）辐射的四个斯托克斯分量。
