Optical code-division-multiplexed systems based on spectral encoding of noncoherent sources

Author

Kavehrad, M. ; Zaccarin, D.

Author_Institution

Dept. of Electr. Eng., Ottawa Univ., Ont., Canada

Volume

13

Issue

3

fYear

1995

fDate

3/1/1995 12:00:00 AM

Firstpage

534

Lastpage

545

Abstract

Presents a new category of optical CDMA systems which work based on spectral encoding. In such systems, that the authors refer to as frequency-encoded CDMA (FE-CDMA) systems, the coding is done in the frequency domain while in the usual CDMA systems the code multiplies the modulation signal in the time domain. They present a new type of FE-CDMA system, based on encoding noncoherent broadband sources. They discuss the advantages of the system compared to other optical CDMA systems and present its performance. They show that very efficient, low-cost, CDMA systems can be obtained with an aggregate throughput of many gigabits per second. Also, for this system, the spreading gain of CDMA is independent of the modulation bandwidth. Hence, the system can accommodate variable bit rates, naturally

Keywords

channel capacity; code division multiple access; encoding; frequency-domain analysis; multiplexing; optical fibre communication; optical modulation; spectral analysis; FE-CDMA; aggregate throughput; frequency domain; frequency-encoded CDMA; modulation bandwidth; modulation signal; noncoherent broadband sources; noncoherent sources; optical CDMA systems; optical code-division-multiplexed systems; performance; spectral encoding; spreading gain; variable bit rates; Aggregates; Bandwidth; Bit rate; Encoding; Frequency domain analysis; Laser mode locking; Multiaccess communication; Nonlinear optics; Optical modulation; Optical pulses;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.372451

Filename

372451