Nd:SrWO<sub>4</sub> Raman laser

Helena Jelinkova; Jan Sulc; Maxim E. Doroschenko; Vadim V. Skornyakov; Sergey B. Kravtsov; Tasoltan Tazretovich Basiev; Peter G. Zverev

doi:10.1117/12.544839

1 September 2004 Nd:SrWO₄ Raman laser

Helena Jelinkova, Jan Sulc, Maxim E. Doroschenko, Vadim V. Skornyakov, Sergey B. Kravtsov, Tasoltan Tazretovich Basiev, Peter G. Zverev

Author Affiliations +

Proceedings Volume 5460, Solid State Lasers and Amplifiers; (2004) https://doi.org/10.1117/12.544839
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

Properties of the laser operation and simultaneously stimulated Raman scattering in the new SRS-active neodymium doped SrWO₄ crystal coherently end-pumped by alexandrite 752 nm laser radiation were investigated. The maximum generated energy 90 mJ from the free-running Nd³⁺:SrWO₄ laser at 1057 nm wavelength was obtained with the output coupler reflectivity 52%. The slope efficiency reached s = 0.52, the beam characteristic parameters M² and divergence q were 2.5 ± 0.1, and 1.5 ± 0.1 mrad, respectively. Maximal output energy of 1.46 mJ for the fundamental wavelength was obtained for Q-switched Nd³⁺:SrWO₄ oscillator with a double Fabry-Perrot as the output coupler (R = 48%), and with the 5% initial transmission of LiF:F₂- saturable absorber. Up to 0.74 mJ energy was registered at the first Stokes frequency. The pulse duration was 5 ns and 2.4 ns for the fundamental and Stokes radiation, respectively. The energy of 1.25 mJ at 1170 nm was obtained for closed Raman resonator with special mirrors. For the case of mode-locking, two dye saturable absorbers (ML51 dye in dichlorethan and 3955 dye in ethanol) were used and SRS radiation in the form of pulse train was observed. The influence of the various Raman laser output couplers reflectivity as well as the initial transmissions of passive absorbers were investigated with the goal of the output energy maximization at the Stokes wavelength. In the output, the total measured energy was 1.8 mJ (for ML51 dye) and 2.4 mJ (for 3955 dye). The SRS output at 1170 nm was approximately 20% of total energy.

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Helena Jelinkova, Jan Sulc, Maxim E. Doroschenko, Vadim V. Skornyakov, Sergey B. Kravtsov, Tasoltan Tazretovich Basiev, and Peter G. Zverev "Nd:SrWO₄ Raman laser", Proc. SPIE 5460, Solid State Lasers and Amplifiers, (1 September 2004); https://doi.org/10.1117/12.544839

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