Author :
Salehi, Jawad A. ; Paek, Eung Gi
Author_Institution :
Bellcore, Morristown, NJ, USA
fDate :
9/1/1995 12:00:00 AM
Abstract :
A new technique for all-optical code division multiple access (CDMA) based on optical holography is described. In this technique the energy of an incoming information light signal is spread over a larger spatial domain by a two-dimensional spatial encoder which consists of patterns of (0, 1) or (1, -1). Subsequent decoding, which is obtained by a holographic filter, spatially despreads the energy of information light signal and brings it to a bright focused light spot. Experimental results obtained to demonstrate the encoding, decoding, and multiaccess capability of the proposed holographic CDMA technique are discussed and compared to other all-optical CDMA techniques. The processing gain for a holographic CDMA can be potentially as high as 106-108 , which suggests that this technique can in principle support hundreds of thousands to a few millions of users
Keywords :
code division multiple access; decoding; encoding; holography; optical fibre networks; optical filters; optical information processing; optical modulation; all-optical code division multiple access; all-optical networks; decoding; encoding; experimental results; holographic CDMA; holographic filter; information light signal; light signal energy; optical holography; optical signals; processing gain; two-dimensional spatial encoder; Decoding; High speed optical techniques; Holographic optical components; Holography; Multiaccess communication; Optical fiber networks; Optical filters; Optical receivers; Optical signal processing; Optical transmitters;
Journal_Title :
Communications, IEEE Transactions on
