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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 19, Iss. 14 — Jul. 15, 1994
  • pp: 1070–1072

Enhancement of the signal-to-background ratio in photorefractive two-wave mixing by mutually incoherent two-beam coupling

S. Breugnot, D. Dolfi, H. Rajbenbach, J.-P. Huignard, and M. Defour  »View Author Affiliations


Optics Letters, Vol. 19, Issue 14, pp. 1070-1072 (1994)
http://dx.doi.org/10.1364/OL.19.001070


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Abstract

We present and experimentally demonstrate a new method for enhancing the signal-to-background ratio of two-wave mixing in photorefractive crystals. The method uses a mutually incoherent third beam to suppress the fanning in a dark ring-shaped region in which the amplified signal is located. A 20-fold improvement of the signal-to-background ratio is measured in BaTiO3 at λ = 514 nm. The extension of this principle to wide-field-of-view heterodyne detection is discussed.

© 1994 Optical Society of America

History
Original Manuscript: January 24, 1994
Published: July 15, 1994

Citation
S. Breugnot, M. Defour, D. Dolfi, H. Rajbenbach, and J.-P. Huignard, "Enhancement of the signal-to-background ratio in photorefractive two-wave mixing by mutually incoherent two-beam coupling," Opt. Lett. 19, 1070-1072 (1994)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-19-14-1070

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