The nonlinearity of phase-conjugate beam reflection with four-wave mixing in bismuth silicon oxide crystal by use of moving gratings at large fringe modulation formed by the incident-beam ratio is investigated. On the basis of this investigation, the edge enhancement of an object and the edge-enhanced optical correlation with improved discrimination capability are achieved by use of moving gratings at an appropriate fringe velocity. Experimental results are presented.
© 2000 Optical Society of America
Original Manuscript: January 21, 2000
Revised Manuscript: May 2, 2000
Published: August 10, 2000
Zhaoqi Wang, Jiuhong Guan, Baolai Liang, and Guoguang Mu, "Edge-enhanced correlation with four-wave mixing in bismuth silicon oxide crystal by use of moving gratings," Appl. Opt. 39, 4112-4116 (2000)