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Proceedings Paper

Local thermal fixing of a photorefractive LiNbO3 hologram by a CO2 laser
Author(s): Bo Liu; Liren Liu; Liangying Xu; Jian Ma; Sing H. Lee
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Paper Abstract

In this paper, an in real time and in situ fixing method by heating with a carbon-dioxide laser beam is suggested to thermally fix a small local hologram in a bulk of Fe:LiNbO3 photorefractive crystal. To form a heating-up to 100 - 200 degree Celsius volume with the shape similar to the laser beam, heat-guiding technique is developed. Based on the heat transfer equations, different heating modes with or without metal absorbers for heat-guiding by using a continuous or pulsed laser beam are analyzed. The optimal mode may be the case of pulsed heating with absorbers. On this basis, experiments are designed and demonstrated. It is seen that the fixing process by carbon-dioxide laser beam is very short compared with the process by oven and the fixing efficiency is quite high.

Paper Details

Date Published: 22 September 1997
PDF: 8 pages
Proc. SPIE 3137, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications III, (22 September 1997); doi: 10.1117/12.279189
Show Author Affiliations
Bo Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Liangying Xu, Shanghai Institute of Silicates (China)
Jian Ma, Univ. of California/San Diego (United States)
Sing H. Lee, Univ. of California/San Diego (United States)


Published in SPIE Proceedings Vol. 3137:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications III
Francis T. S. Yu; Shizhuo Yin, Editor(s)

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