HOLOGRAPHIC-RECORDING IMPROVEMENT IN A BISMUTH SILICON-OXIDE CRYSTAL BY THE MOVING-GRATING TECHNIQUE

Citation
Zq. Wang et al., HOLOGRAPHIC-RECORDING IMPROVEMENT IN A BISMUTH SILICON-OXIDE CRYSTAL BY THE MOVING-GRATING TECHNIQUE, Applied optics, 33(32), 1994, pp. 7627-7633
Citations number
20
Categorie Soggetti
Optics
Journal title
ISSN journal
00036935
Volume
33
Issue
32
Year of publication
1994
Pages
7627 - 7633
Database
ISI
SICI code
0003-6935(1994)33:32<7627:HIIABS>2.0.ZU;2-M
Abstract
We investigate the enhancement of the diffraction efficiency of dynami c gratings recorded in a bismuth silicon oxide crystal at large modula tion by the moving-grating technique. The optimum fringe velocity for maximum diffraction efficiency and the degree of enhancement of the di ffraction efficiency at optimum fringe velocity are experimentally fou nd to be dependent on the fringe modulation. We apply this technique t o real-time incoherent correlation using bismuth silicon oxide. There are two main advantages in using moving gratings: First, the signal-to -noise ratio can be improved considerably because of the improved diff raction efficiency. Second, the resonant effect reduces the effect of environmental disturbances on the peak-correlation intensity, which is significant when the threshold detection level of the correlator is s et.