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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 8 — Mar. 10, 1998
  • pp: 1342–1349

Local thermal fixing of a photorefractive LiNbO3 hologram by use of a CO2 laser

Bo Liu, Liren Liu, Liangying Xu, Jian Ma, and Sing H. Lee  »View Author Affiliations


Applied Optics, Vol. 37, Issue 8, pp. 1342-1349 (1998)
http://dx.doi.org/10.1364/AO.37.001342


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Abstract

A real-time, in situ fixing method by use of heating with a CO2 laser beam is suggested for thermal fixing of a small local hologram in the bulk of a Fe:LiNbO3 photorefractive crystal. For heating up to 100 °C–200 °C a volume with a shape similar to that of the laser beam a heat-guiding technique is developed. On the basis of the heat-transfer equations, different heating modes—with or without metal absorbers for heat guiding—obtained by use of a continuous or pulsed laser beam are analyzed. The optimal mode may be pulsed heating with absorbers. On this basis experiments have been designed and demonstrated. It is seen that the fixing process with CO2 laser beam is short compared with the process by use of an oven, and the fixing efficiency is quite high.

© 1998 Optical Society of America

OCIS Codes
(160.5320) Materials : Photorefractive materials
(200.4650) Optics in computing : Optical interconnects
(210.0210) Optical data storage : Optical data storage

History
Original Manuscript: May 5, 1997
Revised Manuscript: September 8, 1997
Published: March 10, 1998

Citation
Bo Liu, Liren Liu, Liangying Xu, Jian Ma, and Sing H. Lee, "Local thermal fixing of a photorefractive LiNbO3 hologram by use of a CO2 laser," Appl. Opt. 37, 1342-1349 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-8-1342


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