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Proceedings Paper

High-photorefractive resistance of hafnium-doped, single-domain, and periodically-poled lithium niobate crystals
Author(s): Vittorio Degiorgio; Edvard P. Kokanyan; Luca Razzari; Paolo Minzioni; Ilaria Cristiani
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Paper 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.

Paper Details

Date Published: 18 August 2004
PDF: 8 pages
Proc. SPIE 5451, Integrated Optics and Photonic Integrated Circuits, (18 August 2004); doi: 10.1117/12.544789
Show Author Affiliations
Vittorio Degiorgio, INFM (Italy)
Univ. degli Studi di Pavia (Italy)
Edvard P. Kokanyan, INFM (Italy)
Univ. degli Studi di Pavia (Italy)
Istitute for Physical Research (Armenia)
Luca Razzari, INFM (Italy)
Univ. degli Studi di Pavia (Italy)
Paolo Minzioni, INFM (Italy)
Univ. degli Studi di Pavia (Italy)
Ilaria Cristiani, INFM (Italy)
Univ. degli Studi di Pavia (Italy)

Published in SPIE Proceedings Vol. 5451:
Integrated Optics and Photonic Integrated Circuits
Giancarlo C. Righini; Seppo Honkanen, Editor(s)

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