Optical properties of lithium thioindate

Jacques Mangin; Sophie Salaun; Sandrine Fossier; Pierre Strimer; Jean-Jacques Zondy; Ludmila I. Isaenko; Alexander P. Yelisseyev

doi:10.1117/12.424624

1 May 2001 Optical properties of lithium thioindate

Jacques Mangin, Sophie Salaun, Sandrine Fossier, Pierre Strimer, Jean-Jacques Zondy, Ludmila I. Isaenko, Alexander P. Yelisseyev

Author Affiliations +

Proceedings Volume 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials; (2001) https://doi.org/10.1117/12.424624
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

Abstract

The optical properties of LiInS₂ suggested it as a promising material for generation of coherent radiation in the mid-IR region. Before investigating such capabilities its optical and mechanical properties have to be characterized precisely, and especially their evolution with temperature. Sufficiently large and suitably oriented crystals of good optical quality were studied. We first deduced the transparency range of these samples, as well as the frequencies of the optical phonons. We observed a phase- matched second-harmonic generation, using a nanosecond-OPO in the range 2.4 - 2.6 microns as the pump source and estimated a first value of the type-II nonlinearity d_eff(XY) equals 7.4 pm/V. The thermal expansion, thermo-optic, piezoelectric and electro-optic coefficients were determined along the three principal directions of polarization from -20 degrees Celsius up to + 120 degrees Celsius by means of original interferometric methods. A so-called Fabry-Perot Thermal Scanning (FPTS) interferometric method has been developed to measure accurately the electro-optic coefficients. For LiInS₂ the values of r_i3 were found to be of the same order of magnitude as its piezoelectric coefficients, but around one order of magnitude smaller than the electro-optic coefficients of the well known KTiOPO₄.

Citation Download Citation

Jacques Mangin, Sophie Salaun, Sandrine Fossier, Pierre Strimer, Jean-Jacques Zondy, Ludmila I. Isaenko, and Alexander P. Yelisseyev "Optical properties of lithium thioindate", Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); https://doi.org/10.1117/12.424624

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