A promising new UV/VUV nonlinear optical crystal: SrAlF<sub>5</sub>

Kiyoshi Shimamura; Encarnacion Garcia Villora; Kenichi Muramatsu; Hideo Kimura; Kenji Kitamura; Noboru Ichinose

doi:10.1117/12.608764

4 April 2005 A promising new UV/VUV nonlinear optical crystal: SrAlF₅

Kiyoshi Shimamura, Encarnacion Garcia Villora, Kenichi Muramatsu, Hideo Kimura, Kenji Kitamura, Noboru Ichinose

Proceedings Volume 5723, Optical Components and Materials II; (2005) https://doi.org/10.1117/12.608764
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

The growth characteristics and properties of large size SrAlF5 single crystals are described and compared with those of BaMgF₄. Transmission spectra in the vacuum ultraviolet wavelength region indicate a high transparency of SrAlF₅ (about 90% without considering surface reflection loses) down to 150 nm, on contrast to the optical loses observed for BaMgF₄. The ferroelectric character of SrAlF₅ is evidenced by the reversal of the spontaneous polarization in a hysteresis loop. The higher potential of SrAlF₅ in comparison with BaMgF₄ for the realization of all-solid-state lasers in the ultraviolet wavelength region by the quasi-phase matching (QPM) technique is pointed out. SrAlF₅, besides a higher grade of transparency, shows a nonlinear effective coefficient similar to that of quartz and uniaxial nature, on contrast to the one order smaller nonlinear coefficient and biaxial character of BaMgF₄. The refractive index of SrAlF₅ from the ultraviolet to the near-infrared wavelength region is measured by the minimum deviation method. The Sellmeier and Cauchy coefficients are obtained from the fits to the curves of the ordinary and extraordinary refractive indices, and the grating period for the first order QPM is estimated as a function of the wavelength. The poling periodicity for 193 nm SHG from 386 nm is 4 micron-m.

Citation Download Citation

Kiyoshi Shimamura, Encarnacion Garcia Villora, Kenichi Muramatsu, Hideo Kimura, Kenji Kitamura, and Noboru Ichinose "A promising new UV/VUV nonlinear optical crystal: SrAlF₅", Proc. SPIE 5723, Optical Components and Materials II, (4 April 2005); https://doi.org/10.1117/12.608764

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