Interferometry based on Lau e€ect with a grating registered in a photorefractive crystal

MYRIAN TEBALDI; LUCIANO ANGEL TORO; NÉSTOR BOLOGNINI

OPTICS AND LASER TECHNOLOGY

Elsevier Science

Lugar: Amsterdam (The Netherlands); Año: 1999 vol. 31 p. 127 - 134

0030-3992

The use of a grating in the form of modulation of birefringence in a BSO crystal in a novel Lau interferometer set-up is proposed. The system behaves as a conventional Lau interferometer implemented by using two amplitude gratings. Moreover, it permits control of the visibility and provides a contrast inversion of the interferometric fringes by rotating a polarizer. Two alternative experimental arrangements with similar performance are presented. A theoretical approach is outlined and the predicted behavior is con®rmed by results obtained under di€erent experimental conditions.