Anti-Stokes nanosecond cyan 503, 507, and 508 nm generation at tangential phase matching in extracavity parametric Raman lasers based on crystals with different birefringence

Sergei N. Smetanin; Michal Jelínek; Dmitry P. Tereshchenko; Vladislav E. Shukshin; Lyudmila I. Ivleva; Václav Kubeček

doi:10.1117/12.2520939

30 April 2019 Anti-Stokes nanosecond cyan 503, 507, and 508 nm generation at tangential phase matching in extracavity parametric Raman lasers based on crystals with different birefringence

Sergei N. Smetanin, Michal Jelínek, Dmitry P. Tereshchenko, Vladislav E. Shukshin, Lyudmila I. Ivleva, Václav Kubeček

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Proceedings Volume 11026, Nonlinear Optics and Applications XI; 1102619 (2019) https://doi.org/10.1117/12.2520939
Event: SPIE Optics + Optoelectronics, 2019, Prague, Czech Republic

Abstract

Parametric four-wave mixing of frequency components in a crystalline Raman laser allowed generation of a collimated beam of not only Stokes, but also anti-Stokes components of the Raman radiation. Recently, to widen the angular tolerance of four-wave mixing and to obtain high conversion efficiency into the anti-Stokes wave, we have developed new schemes of the parametric Raman anti-Stokes lasers at 503 nm and 954 nm with tangentially phase-matched collinear beam interaction of orthogonally-polarized Raman components in a CaCO₃ crystal under 532 nm and 1064 nm laser pumping. Now we use not only the CaCO₃ crystal, but also other Raman-active crystals with different birefringence for the tangentially phase-matched parametric Raman laser under green (532 nm) pumping. We have theoretically and experimentally studied characteristics of tangential phase matching of Stokes <–< anti-Stokes interaction for different negative and positive uniaxial crystals with high and low birefringence. We have developed and experimentally realized the extracavity parametric Raman anti-Stokes lasers based not only on highly-birefringent uniaxial negative CaCO₃ (1086 cm^–1, 503 nm) and positive GdVO₄ (882 cm–1, 508 nm) crystals, but also on a low-birefringent uniaxial positive SrWO₄ crystal (921 cm^–1, 507 nm). Cyan anti-Stokes radiation was generated from green (532 nm), 5-ns, 1-mJ pump radiation. While high-birefringent crystals require probe-pump technique of double beam excitation, the low-birefringent crystal parametric Raman laser can be developed in the simplest system of single beam excitation. The green-to-cyan anti-Stokes conversion efficiency higher 1% was achieved in all the laser schemes.

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Sergei N. Smetanin, Michal Jelínek, Dmitry P. Tereshchenko, Vladislav E. Shukshin, Lyudmila I. Ivleva, and Václav Kubeček "Anti-Stokes nanosecond cyan 503, 507, and 508 nm generation at tangential phase matching in extracavity parametric Raman lasers based on crystals with different birefringence", Proc. SPIE 11026, Nonlinear Optics and Applications XI, 1102619 (30 April 2019); https://doi.org/10.1117/12.2520939

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KEYWORDS

Crystals

Laser crystals

Phase matching

Birefringence

Four wave mixing

Laser development

Mirrors

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