Holographic code division multiple access

Details Holographic code division multiple access Holographic code division multiple access

1993-01-15

1995-08-01

Ben, Loha

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

359 29, 359559, 382210, G03H 112, G03H 116, G02B 2746, G06K 1100

Patent

active

054384400

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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