High-photorefractive resistance of hafnium-doped, single-domain, and periodically-poled lithium niobate crystals

Vittorio Degiorgio; Edvard P. Kokanyan; Luca Razzari; Paolo Minzioni; Ilaria Cristiani

doi:10.1117/12.544789

18 August 2004 High-photorefractive resistance of hafnium-doped, single-domain, and periodically-poled lithium niobate crystals

Vittorio Degiorgio, Edvard P. Kokanyan, Luca Razzari, Paolo Minzioni, Ilaria Cristiani

Author Affiliations +

Proceedings Volume 5451, Integrated Optics and Photonic Integrated Circuits; (2004) https://doi.org/10.1117/12.544789
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

Transient and steady-state measurements of photo-induced birefringence variations in single domain and periodically poled lithium niobate (LN) crystals containing different non-photorefractive impurities are presented. The birefringence change is induced by a 532-nm laser beam in the intensity range 0-500 W/cm², and is probed by 632.8- and 1523-nm beams. Data were taken at 25 and 50°C. We find that HfO₂ doping is very effective in reducing the photorefraction. This is interesting also because it is known that Hafnium-doped LN crystals can be periodically-poled during growth. The analysis of the rise and decay of the induced birefringence shows that doping considerably increases both the photoconductivity and the dark conductivity of the LN crystals.

Citation Download Citation

Vittorio Degiorgio, Edvard P. Kokanyan, Luca Razzari, Paolo Minzioni, and Ilaria Cristiani "High-photorefractive resistance of hafnium-doped, single-domain, and periodically-poled lithium niobate crystals", Proc. SPIE 5451, Integrated Optics and Photonic Integrated Circuits, (18 August 2004); https://doi.org/10.1117/12.544789

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