Effect of beam attenuation on photorefractive grating erasure

Martin Liphardt, Arosha Goonesekera, Stephen Ducharme, James M. Takacs, Lei Zhang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We investigate the influence of attenuation on the speed of erasure of photorefractive gratings by solving the coupled-wave equations in the undepleted pump approximation and by taking into account the attenuation and Gaussian intensity profile of all the beams. The extrinsic grating decay rate is significantly lower than the intrinsic photorefractive decay rate in samples with overall attenuation as low as 10%. The Gaussian beam profiles of the readout and the erasing beams result in a further reduction of the extrinsic decay rate. The results of these calculations are used to determine the spectrum of intrinsic decay rates in a photorefractive polymer.

Original languageEnglish (US)
Pages (from-to)2252-2260
Number of pages9
JournalJournal of the Optical Society of America B: Optical Physics
Issue number10
StatePublished - Oct 1996

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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