Photorefractive optical processing: some proposals

MYRIAN TEBALDI; LUCIANO ANGEL; NESTOR BOLOGNINI

Dehradum

Conferencia; International Conference on Optics and Optoelectronics '98; 1998

.

Some proposals on Lau and Talbot fringes formation based on a grating registered as birefringence modulation in a photorefractive ciystal, will be presented. In the Talbot case, the stored grating can be replicated fread-out with coherent light. The system for the Lau arrangement behaves as a combination of an amplitude and a birefringence phase grating. Inboth cases, it is possible to control the visibility and to produce a contrast reversion offringes by using an analyzer. Besides, Lau and Talbot interferometers based on the mentioned approach and their alternative experimental arrangements will be discussed.