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Optics Letters

Optics Letters


  • Vol. 28, Iss. 14 — Jul. 15, 2003
  • pp: 1254–1256

Simple method for determining the gain coefficient of a photorefractive polymer film

Won-Jae Joo and Nakjoong Kim  »View Author Affiliations

Optics Letters, Vol. 28, Issue 14, pp. 1254-1256 (2003)

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We propose a simple method for measuring the gain coefficient of two-beam coupling for photorefractive polymer film. To measure the gain coefficient, we attached a phase grating onto the photorefractive polymer film and made an interference pattern between the transmitted and diffracted beams in the photorefractive film by using an illuminating single beam. The gain coefficient values measured at various external fields by our method showed good agreement with those measured by a standard two-beam coupling method. Compared to standard two-beam coupling, this method exhibited fairly improved stability of the output signal to external factors such as human sounds and airstreams.

© 2003 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(160.4890) Materials : Organic materials
(160.5320) Materials : Photorefractive materials
(190.7070) Nonlinear optics : Two-wave mixing

Won-Jae Joo and Nakjoong Kim, "Simple method for determining the gain coefficient of a photorefractive polymer film," Opt. Lett. 28, 1254-1256 (2003)

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