Fourth-harmonic generation of the CO2 laser wavelength at 10.5910 μm in BaGa4S7

Kiyoshi Kato; Takayuki Okamoto; Takuya Mikami; Valentin Petrov; Valeriy Badikov; Dmitrii Badikov; Vladimir Panyutin

doi:10.1117/12.2002929

12 March 2013 Fourth-harmonic generation of the CO₂ laser wavelength at 10.5910 μm in BaGa₄S₇

Kiyoshi Kato, Takayuki Okamoto, Takuya Mikami, Valentin Petrov, Valeriy Badikov, Dmitrii Badikov, Vladimir Panyutin

Proceedings Volume 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII; 860416 (2013) https://doi.org/10.1117/12.2002929
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

This paper reports the 90° phase-matched fourth-harmonic generation of the CO₂ laser wavelength at 10.5910 μm in BaGa₄S₇. The 1.4 cm long BaGa₄S₇ crystal used in the present experiment was cut at θ=9.2° in the xz(=bc) plane. The pump source was the second harmonic of the wave-guide CO₂ laser (10.5910 μm) operating with an average output power of 18.3 W at 130 kHz. By focusing the 7.6 W, 5.2955 μm pulses (peak power is 6kW with 10 ns pulse duration) generated from the 2 cm long AgGa_0.65In_0.35Se₂ crystal into the BaGa₄S₇ crystal (θ_PM=9.9°) with the 6 cm focal length ZnSe lens, the maximum average output power of 0.3 W was obtained at 2.6478 μm without any damage to the crystal. In addition, the new Sellmeier equations of BaGa₄S₇ are presented.

Citation Download Citation

Kiyoshi Kato, Takayuki Okamoto, Takuya Mikami, Valentin Petrov, Valeriy Badikov, Dmitrii Badikov, and Vladimir Panyutin "Fourth-harmonic generation of the CO₂ laser wavelength at 10.5910 μm in BaGa₄S₇", Proc. SPIE 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII, 860416 (12 March 2013); https://doi.org/10.1117/12.2002929

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