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Proceedings Paper

Optical damage resistance and transparency of MgO-doped LiTaO3 single crystals for SHG devices
Author(s): Yasunori Furukawa; Fumio Nitanda; Masayoshi Sato; Satoshi Makio; Kohei Ito
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Paper Abstract

Clear and transparent MgO doped LiTaO3 single crystals have been grown by the Czochralski method from a congruent melt. Their optical damage resistance has been characterized by measurement of the change of photoinduced birefringence. We compare the optical damage resistance of LiTaO3 and LiNbO3, each containing almost the same amount of Fe impurities (less than 1 ppm), and show that LiTaO3 has about 4 times lower optical damage resistance, which is not consistent with the data previously reported in the literature. On the other hand, MgO doped yielded an improvement in the optical damage resistance, as reported for MgO doped LiNbO3 crystals. The other important features of MgO doping are that: improved transparency spectra especially in a visible wavelength region, resulting in a change of color to clear and transparent from brown-yellow, and a shift in the absorption edge to shorter wavelengths of 270 nm. These are important advantages when considering shorter wavelength accessibility and high conversion efficiency in second harmonic generation devices.

Paper Details

Date Published: 21 July 1993
PDF: 6 pages
Proc. SPIE 1863, Growth, Characterization, and Applications of Laser Host and Nonlinear Crystals II, (21 July 1993); doi: 10.1117/12.149275
Show Author Affiliations
Yasunori Furukawa, Hitachi Metals, Ltd. (Japan)
Fumio Nitanda, Hitachi Metals, Ltd. (Japan)
Masayoshi Sato, Hitachi Metals, Ltd. (Japan)
Satoshi Makio, Hitachi Metals, Ltd. (Japan)
Kohei Ito, Hitachi Metals, Ltd. (Japan)

Published in SPIE Proceedings Vol. 1863:
Growth, Characterization, and Applications of Laser Host and Nonlinear Crystals II
Bruce H. T. Chai, Editor(s)

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