Abstract
Holograms have been recorded in congruent with continuous-wave laser light by use of a two-step process. Blue gating light sensitizes the crystals for holographic recording with red light of a diode laser. Refractive-index changes of as much as are achieved for intensities of the red light of . The saturation values are proportional to the intensity of the writing light. Nondestructive readout with red light is possible, and the holograms remain erasable for blue light.
© 1999 Optical Society of America
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