Holographic code division multiple access

Details Holographic code division multiple access Holographic code division multiple access

1993-01-15

1994-02-22

Lerner, Martin

Optical: systems and elements

Holographic system or element

Fourier transform holography

359559, 382 31, G02B 2742, G03H 116

Patent

active

052892999

ABSTRACT:
A technique for all-optical Code Division Multiple Access (CDMA) system based on optical holography is disclosed. In this technique the energy of an incoming information light signal is spread over a spatial domain by a two-dimensional spatial encoder which includes a mask having regions of first and second transmission characteristics corresponding to the unique code assigned to a particular source. Subsequent decoding, which is accomplished by an optical matched filter through the use of a hologram, spatially despreads the energy of the information light signal and produces a focused light beam which serves as input to a code division detector.

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