Patent ID: 7324286
Filing Date: 2008-01-29
Classification: G02B,G02F

Abstract:
1. An optical device comprising: an optically controlled liquid crystal spatial light modulator; a first laser source for providing a controlled beam that is focused at the optically controlled liquid crystal spatial light modulator; a second laser source for providing a controlling beam at a controlling wavelength; a lens for aligning the controlling beam having a controlling wavelength in an area of highest gradient power density of the controlling beam on the optically controlled liquid crystal spatial light modulator, wherein an e-component of the controlled beam is deflected by a gradient refractive index and birefringence induced by the controlling beam to provide optically controlled beam switching for laser beam control; a collimator for collimating the controlled beam after the controlled beam passes through the optically controlled liquid crystal spatial light modulator; and a volume Bragg grating recorded in a photosensitive PTR glass for angular magnification of the collimated controlled beam to decrease a switching time, wherein the collimated controlled beam is directed to the volume Bragg grating so that the collimated controlled beam is not diffracted.