A novel setup for Lau fringe formation is proposed that employs a grating registered as birefringence modulation in a photorefractive crystal. The system behaves as a combination of an amplitude and a birefringence phase grating, which enables us to control the visibility and provide a contrast reversion of the Lau fringes by rotating an analyzer. A theoretical approach is presented and the predicted behavior is confirmed by results obtained under different experimental conditions.
Myrian C. Tebaldi,
Luciano Angel Toro,
Nestor A. Bolognini,
"Lau fringe formation using a grating registered in a BSO crystal," Optical Engineering 37(11), (1 November 1998). http://dx.doi.org/10.1117/1.601885