Title :
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
fDate :
10/1/1994 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
