Thermal fixing of volume holograms in potassium niobate

Xiaolin Tong*, Min Zhang, Amnon Yariv, Aharon Agranat

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Volume holograms are thermally fixed in a pure and an iron doped potassium niobate crystal through the screening of a photorefractive space-charge field by a nonphotoactive species at elevated temperature (110 °C). The nonphotoactive species is identified as the hydrogen ion. Fixed holograms are reconstructed at different temperatures. A diffraction efficiency of 16% in a 6 mm thick KNbO3:Fe sample is measured. The time constant and activation energy associated with the thermal induced decay of the hologram are determined to be 2.9×10-7 s and 0.81 eV for the KNbO3:Fe sample, and 1.35×10-7 s and 0.79 eV for the pure KNbO3 sample.

Original languageAmerican English
Pages (from-to)3966-3968
Number of pages3
JournalApplied Physics Letters
Issue number26
StatePublished - 23 Dec 1996


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