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Proceedings Paper

Two-color photorefractive holography in Mn-doped near-stoichiometric lithium niobate crystals
Author(s): Youwen Liu; Kenji Kitamura; Shunji Takekawa; Masaru Nakamura; Ganesan Ravi; Hideki Hatano; Takashi Yamaji
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Paper Abstract

Holograms are recorded in near-stoichiometric LiNbO3 doped with 8 ppm of Mn by use of two-color holographic recording method, where an IR laser of 778 nm is used for writing and an UV laser of 350 nm is used for gating. Dependences of two-color sensitivity and M/# on gating and writing intensities are presented. Significant improvements of sensitivity, M/# and dark decay are obtained compared with reduced near-stoichiometric LiNbO3. To our knowledge, the measured two-color sensitivity of 0.21 cm/J with a gating intensity of 1.5 W/cm2 is the highest among the values reported so far, which is attributed to large light-induced absorption of small polarons. 50 plane-wave holograms are recorded by the conventional angle-multiplexing method.

Paper Details

Date Published: 17 September 2002
PDF: 5 pages
Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002); doi: 10.1117/12.483360
Show Author Affiliations
Youwen Liu, National Institute for Materials Science (Japan)
Kenji Kitamura, National Institute for Materials Science (Japan)
Shunji Takekawa, National Institute for Materials Science (Japan)
Masaru Nakamura, National Institute for Materials Science (Japan)
Ganesan Ravi, National Institute for Materials Science (Japan)
Hideki Hatano, Pioneer Corp. (Japan)
Takashi Yamaji, Pioneer Corp. (Japan)

Published in SPIE Proceedings Vol. 4930:
Advanced Optical Storage Technology
Duanyi Xu; Seiya Ogawa, Editor(s)

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