Phase matching and optical properties of LiInS2 nonlinear crystal

Yuri M. Andreev; Pavel P. Geiko; Lilya G. Geiko; Sergey G. Grechin

doi:10.1117/12.460151

26 March 2002 Phase matching and optical properties of LiInS₂ nonlinear crystal

Yuri M. Andreev, Pavel P. Geiko, Lilya G. Geiko, Sergey G. Grechin

Proceedings Volume 4747, International Conference on Atomic and Molecular Pulsed Lasers IV; (2002) https://doi.org/10.1117/12.460151
Event: International Conference on Atomic and Molecular Pulsed Lasers IV, 2001, Tomsk, Russian Federation

Abstract

Results on investigation of linear and non-linear optical properties, damage threshold and potential efficiencies of biaxial LiInS₂ crystal are represented. Transmission range is 0.4 - 12.5 micrometers at the 0.1 level and 0.5 - 11.0 micrometers at the 0.5 level. Typical absorption coefficients are as low as 0,1 - 0,25 cm^-1 at the maximum transmission range 1.0 - 8.0 micrometers and 1.1 - 2.3 cm^-1 at the CO₂ laser wavelengths. Coefficients of second order non-linear susceptibilities are d₃₁ equals 6.2, d₃₂ equals 5.4 and d₃₃ equals 9.8 pm/V, but damage threshold is as high as 120 - 130 MW/sm² for 36 ns pulses at 9.55 micrometers . The phase-matching is estimated with using of determined Sellmeier coefficients. It is represented in graphic form so as fields of SHG efficiencies. It is shown that LiInS₂ can be used in middle IR OPO pumped by Cu-vapor laser, group-velocity phase matching take place in wide spectral range for sum- and difference-frequency generation of visible, near and middle IR lasers including SHG of 3 micrometers Er laser.

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Yuri M. Andreev, Pavel P. Geiko, Lilya G. Geiko, and Sergey G. Grechin "Phase matching and optical properties of LiInS₂ nonlinear crystal", Proc. SPIE 4747, International Conference on Atomic and Molecular Pulsed Lasers IV, (26 March 2002); https://doi.org/10.1117/12.460151

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