Papashvili AG, Kochukov YA, Tereshchenko DP, Smetanin SN, Kharitonova PD, Shukshin VE, Dunaeva EE, Voronina IS, Ivleva LI. Highly transient stimulated Raman scattering in SrMoO
4 under ultrafast laser pumping with a controllable chirp.
OPTICS LETTERS 2023;
48:4528-4531. [PMID:
37656545 DOI:
10.1364/ol.499428]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/04/2023] [Indexed: 09/03/2023]
Abstract
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 SrMoO4 crystal with high total Raman conversion efficiency of up to 48% in conditions of competition with self-phase modulation (SPM). A 58-mm-long SrMoO4 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-1) and secondary (327 cm-1) 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.
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