READOUT OF A REAL-TIME HOLOGRAM IN BACTERIORHODOPSIN FILM WITH HIGH DIFFRACTION EFFICIENCY AND INTENSITY

A scheme for the readout of a hologram recorded in bacteriorhodopsin f ilm with high diffraction efficiency and intensity is suggested and de monstrated. Two weak coherent continuous beams function as the recordi ng beams, and a strong light pulse is used to read the real-time holog ram. The width of the readout light pulse is modulated to be short com pared with the erase time of the reading beam; the time space between two adjacent pulses is ensured to be longer than the time the beams ta ke to recover the hologram, and high diffraction efficiency and intens ity (similar to 11 mW/cm(2)) can be obtained. (C) 1996 Optical Society of America.