Hologram enhancement in photorefractive media

Pochi Yeh*, Claire Gu, Chau Jern Cheng, Ken Y. Hsu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We consider the possibility of restoration and/or enhancement of decaying holograms in photorefractive media by using a simple optical readout in conjunction with a phase conjugator. The results indicate that extremely weak holograms can be enhanced provided that the two-beam coupling is sufficiently strong. Steady-state photorefractive holograms can be maintained continuously without decay by using a properly designed readout scheme. The result also provides an explanation for the formation of mutually pumped phase conjugation in terms of the amplification of initial noise gratings.

Original languageEnglish
Pages (from-to)2204-2212
Number of pages9
JournalOptical Engineering
Issue number8
Publication statusPublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering


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