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Proceedings Article

New mixed LiGa0.5In0.5Se2 nonlinear crystal for the mid-IR

[+] Author Affiliations
Vitaliy Vedenyapin, Ludmila Isaenko, Alexander Yelisseyev, Sergei Lobanov

Institute of Geology and Mineralogy (Russian Federation)

Aleksey Tyazhev, Georgi Marchev, Valentin Petrov

Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)

Proc. SPIE 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X, 79171L (February 21, 2011); doi:10.1117/12.874504
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From Conference Volume 7917

  • Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X
  • Konstantin L. Vodopyanov
  • San Francisco, California, USA | January 22, 2011

abstract

LiGaSe2 and LiInSe2 are promising nonlinear crystals for conversion of laser radiation to the mid-IR spectral range which are transparent down to the visible and UV. We successfully grew a new mixed crystal as a solid solution in the system LiGaSe2 - LiInSe2, with a composition of LiGa0.5In0.5Se2 which has the same orthorhombic structure (mm 2) as the parent compounds (LiGaSe2 and LiInSe2). The new crystal is more technological with regard to the growth process in comparison with LiGaSe2 and LiInSe2 since its homogeneity range is broader in the phase diagram. We established that about 10% of the Li ions are found in octahedral position with coordination number of 3. The band-gap of LiGa0.5In0.5Se2 is estimated to be 2.94 eV at room temperature. The transparency at the 0-level extends from 0.47 to 13 μm. The dispersion of the principal refractive indices was measured and Sellmeier equations were constructed. The fundamental wavelength range for the SHG process extends from 1.75 to 11.8 μm. The nonlinear coefficients of LiGa0.5In0.5Se2 have values between those of LiGaSe2 and LiInSe2.

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Citation

Vitaliy Vedenyapin ; Ludmila Isaenko ; Alexander Yelisseyev ; Sergei Lobanov ; Aleksey Tyazhev, et al.
"New mixed LiGa0.5In0.5Se2 nonlinear crystal for the mid-IR", Proc. SPIE 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X, 79171L (February 21, 2011); doi:10.1117/12.874504; http://dx.doi.org/10.1117/12.874504


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