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Proceedings Paper

Optical properties of lithium thioindate
Author(s): Jacques Mangin; Sophie Salaun; Sandrine Fossier; Pierre Strimer; Jean-Jacques Zondy; Ludmila I. Isaenko; Alexander P. Yelisseyev
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Paper 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 deff(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 ri3 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.

Paper Details

Date Published: 1 May 2001
PDF: 9 pages
Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); doi: 10.1117/12.424624
Show Author Affiliations
Jacques Mangin, Univ. de Bourgogne (France)
Sophie Salaun, Univ. de Bourgogne (France)
Sandrine Fossier, Univ. de Bourgogne (France)
Pierre Strimer, Univ. de Bourgogne (France)
Jean-Jacques Zondy, Observatoire de Paris (France)
Ludmila I. Isaenko, Design and Technological Institute of Monocrystals (Russia)
Alexander P. Yelisseyev, Design and Technological Institute of Monocrystals (Russia)

Published in SPIE Proceedings Vol. 4268:
Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials
Jeffrey W. Pierce; Kathleen I. Schaffers; Kathleen I. Schaffers, Editor(s)

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