Generation of spatial subharmonic gratings in the absence of photorefractive beam coupling


Using a new experimental geometry, we have proved for the first time that the generation of spatial subharmonic gratings in photorefractive crystals is not dependent on optical nonlinearity. We present results which confirm that the subharmonic gratings result from a parametric excitation of ultra low-frequency eigenmodes of a crystal by a time modulated fundamental grating.

Uncontrolled Keywords: experimental geometry, spatial subharmonic gratings, photorefractive crystals, optical nonlinearity, subharmonic gratings, parametric excitation, ultra low-frequency eigenmodes, time modulated fundamental grating
Publication ISSN: 0031-9007
Last Modified: 23 Oct 2019 11:28
Date Deposited: 03 May 2011 11:09
Published Date: 1994
Authors: McClelland, T.E.
Webb, David J.
Sturman, B.I.
Ringhofer, K.H.


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