Abstract
Spectral hole burning holography can store both the temporal and spatial information. In cryogenic temperature, only a certain group of atoms in the spectral hole burning material can interact with the incident photons of specific frequency. It allows an extra degree of freedom to store and access information, i.e. the frequency domain. 12,000 holograms at a single location by frequency multiplexing has been demonstrated.2 The storage capacity can be further increased by combining angle and frequency multiplexing. A system measure of the hologram diffraction efficiency obtainable by multiplexing M holograms at a single location and frequency is given by the M/#.1 In this paper we report the measurement of M/# in a 400 μm thick sample of H2 TBNP in Fig. 1. Bleaching curve of H2- TBNP-.PVB. Fig. 2. Angle selectivity with iris. polyvinyl butyral (PVB) with a concentration of 3 x 10 5 mol/l. Fig. 1 shows the absorption kinetics measured at 2 Kelvin. The bleaching intensity is about 10 pW/cm2.
© 2001 Optical Society of America
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