Nanosecond parametric Raman anti-Stokes SrWO4 laser at 507 nm with collinear phase matching

S N Smetanin; M Jelínek; D P Tereshchenko; V E Shukshin; M V Konyukhov; A G Papashvili; I S Voronina; L I Ivleva; V Kubeček

doi:10.1364/OE.397579

Nanosecond parametric Raman anti-Stokes SrWO₄ laser at 507 nm with collinear phase matching

Opt Express. 2020 Jul 20;28(15):22919-22932. doi: 10.1364/OE.397579.

Authors

S N Smetanin, M Jelínek, D P Tereshchenko, V E Shukshin, M V Konyukhov, A G Papashvili, I S Voronina, L I Ivleva, V Kubeček

PMID: 32752545
DOI: 10.1364/OE.397579

Abstract

Collinear phase matching of the Stokes ↔ anti-Stokes interaction for Raman-active crystals with different birefringence was studied theoretically as well as experimentally. It was shown that collinear phase matching of the Stokes ↔ anti-Stokes interaction in low-birefringent crystals can be insensitive to angular mismatch if a phase matching angle is higher than 60^°. We have developed and experimentally realized an extracavity parametric Raman anti-Stokes laser based on a low-birefringent SrWO₄. Cyan 507-nm anti-Stokes conversion from green (532 nm) pump radiation of a 5-ns, 1-mJ second harmonic Nd:YAG laser has been obtained. Laser setup with a single beam excitation made it possible to use an output face of the SrWO₄ crystal as an output coupler because of wide (6^°) angular tolerance of collinear phase matching that resulted in an increase of slope efficiency of anti-Stokes generation higher than 3% at the anti-Stokes energy output of a 10-µJ level.