Reduction of optical beat interference in SCM/WDMA networks using pseudorandom phase modulation

Author

Banat, Mohammad M. ; Kavehrad, Mohsen

Author_Institution

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

Volume

12

Issue

10

fYear

1994

fDate

10/1/1994 12:00:00 AM

Firstpage

1863

Lastpage

1868

Abstract

A new approach is suggested to reduce the optical beat interference (OBI) in subcarrier multiplexed (SCM) wavelength-division multiple access (WDMA) networks. The idea is to deliberately introduce independent random polarization fluctuations in the electric fields transmitted on each optical channel. Random polarization results in an expanded OBI spectrum, and hence, less OBI power at the reference user receiving filter output. Electro-optic phase modulation is used to introduce polarization randomness in the fields before they are coupled into the fibers, A two-user system was simulated. Simulation results show the drastic reduction in OBI power spectral density using appropriate PN signals

Keywords

electro-optical devices; fluctuations; frequency division multiple access; light interference; light polarisation; optical fibres; optical links; optical modulation; phase modulation; subcarrier multiplexing; wavelength division multiplexing; OBI power spectral density; PN signals; SCM/WDMA networks; electric fields; electro-optic phase modulation; expanded OBI spectrum; independent random polarization fluctuations; less OBI power; optical beat interference; optical channel; polarization randomness; pseudorandom phase modulation; reference user receiving filter output; simulation results; subcarrier multiplexed; two-user system; wavelength-division multiple access; Bandwidth; Intelligent networks; Interference; Optical fiber networks; Optical filters; Optical mixing; Optical modulation; Optical noise; Optical receivers; Phase modulation;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.337501

Filename

337501