Efficient synchronously-pumped all-solid-state SrWO4 Raman laser at 1178 and 1227 nm on single and combined Raman modes with 26-fold pulse shortening down to 1.4 ps

Milan Frank; Sergei N. Smetanin; Michal Jelínek; David Vyhlídal; Vladislav E. Shukshin; Lyudmila I. Ivleva; Petr G. Zverev; Václav Kubeček

doi:10.1117/12.2520932

30 April 2019 Efficient synchronously-pumped all-solid-state SrWO₄ Raman laser at 1178 and 1227 nm on single and combined Raman modes with 26-fold pulse shortening down to 1.4 ps

Milan Frank, Sergei N. Smetanin, Michal Jelínek, David Vyhlídal, Vladislav E. Shukshin, Lyudmila I. Ivleva, Petr G. Zverev, Václav Kubeček

Author Affiliations +

Proceedings Volume 11026, Nonlinear Optics and Applications XI; 1102618 (2019) https://doi.org/10.1117/12.2520932
Event: SPIE Optics + Optoelectronics, 2019, Prague, Czech Republic

Abstract

In this paper, the characteristics of synchronously pumped picosecond Raman laser based on the 36 mm long SrWO₄ crystal at the shifts of ν₁ = 921 cm^–1 and ν₂ = 336 cm^–1 under 36-ps extracavity pumping are presented. The first Stokes at the wavelength of 1178 nm, corresponding to the Raman shift of ν₁, with the slope efficiency of 45.1%, output energy of up to 40 nJ, and pulse duration of 33 ps, respectively, was achieved for the output coupler reflectivity of 89%. In the case of setup with the higher cavity Q-factor at 1178 nm, we obtained not only usual ν₁- shifted Raman radiation at 1178 nm, but also the unusual line at the wavelength of 1227 nm (ν₁ + ν₂). This additional line was achieved with the slope efficiency of 18.1 % and the output energy of 15 nJ with the output coupler reflectivity of 96.5% at 1227 nm. Strong pulse shortening from 36 ps down to 1.4 ps at the wavelength of 1227 nm was observed at +50 μm positive detuning of the external cavity length. This value is close to the inverse value of the ν₂ line.

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Milan Frank, Sergei N. Smetanin, Michal Jelínek, David Vyhlídal, Vladislav E. Shukshin, Lyudmila I. Ivleva, Petr G. Zverev, and Václav Kubeček "Efficient synchronously-pumped all-solid-state SrWO₄ Raman laser at 1178 and 1227 nm on single and combined Raman modes with 26-fold pulse shortening down to 1.4 ps", Proc. SPIE 11026, Nonlinear Optics and Applications XI, 1102618 (30 April 2019); https://doi.org/10.1117/12.2520932

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KEYWORDS

Picosecond phenomena

Crystals

Output couplers

Pulsed laser operation

Mirrors

Reflectivity

Laser crystals

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