[OPTICAL REVIEW Vol. 3, No. 2 (1996) 124-127]
Visualization of a Phase Object by Two-Wave Coupling in a Photorefractive Bismuth Silicon Oxide Crystal
Yoshimasa KAWATA and Satoshi KAWATA
Department of Applied Physics, Osaka University, Suita, Osaka, 565 Japan
(Received November 1, 1995; Accepted December 22, 1995)
We propose a method to visualize a phase object using a locally-controllable image amplification scheme we developed earlier which is based on two-wave coupling in a bismuth silicon oxide (Bi12SiO20, or BSO) crystal. In this method the BSO crystal is used as a phase plate in the configuration of Zernike's phase contrast imaging system. The principle of the phase-visualization with two-wave coupling is presented. An experimental result to verify the proposed method is shown.
Key words : two-wave coupling, Zernike's phase contrast microscope, bismuth silicon oxide, photorefractive, photoconductivity, nonlinear optics, phase conjugation, image amplification