Optical damage resistance and transparency of MgO-doped LiTaO3 single crystals for SHG devices

Yasunori Furukawa; Fumio Nitanda; Masayoshi Sato; Satoshi Makio; Kohei Ito

doi:10.1117/12.149275

21 July 1993 Optical damage resistance and transparency of MgO-doped LiTaO3 single crystals for SHG devices

Yasunori Furukawa, Fumio Nitanda, Masayoshi Sato, Satoshi Makio, Kohei Ito

Proceedings Volume 1863, Growth, Characterization, and Applications of Laser Host and Nonlinear Crystals II; (1993) https://doi.org/10.1117/12.149275
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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.

Citation Download Citation

Yasunori Furukawa, Fumio Nitanda, Masayoshi Sato, Satoshi Makio, and Kohei Ito "Optical damage resistance and transparency of MgO-doped LiTaO3 single crystals for SHG devices", Proc. SPIE 1863, Growth, Characterization, and Applications of Laser Host and Nonlinear Crystals II, (21 July 1993); https://doi.org/10.1117/12.149275

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