High Contrast High Speed Normal Incidence Optical Modulator

Y. S. Bai, X. A. Shen, and R. Kachru, Molecular Physics Lab, SRI International, Menlo Park, Calif.

Coherent time-domain optical memory (CTOM), also known as stimulated photon echo memory, offers the potential of ultra-high storage density and ultra-high data throughput rate. Similar to persistent spectral hole burning, CTOM stores information in the frequency dimension of an inhomogeneous broadened absorbing material in addition to the spatial addresses used in the conventional 2-D optical memories. However, in CTOM, stored information is the Fourier transform of a structured data pulse, instead of zeros and ones in the frequency dimension. In practice, the data pulse can be conveniently an amplitude modulated binary stream, composed of zeros and ones in the time sequence.

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