Title :
Observation of coherent interchannel interference in the multiwavelength operation of an acoustooptic filter
Author :
Choy, M.M. ; Cheung, K.W. ; Smith, D.A. ; Baran, J.E.
Author_Institution :
Bellcore, Red Bank, NJ, USA
fDate :
7/1/1989 12:00:00 AM
Abstract :
Wavelength-division multiplexing using acoustically tuned optical filters offers narrow channel spacing, wide tuning range, and the capability for multiple-wavelength switching. It is shown that a coherent source of interference can arise in multiwavelength switching, due to the simultaneous interaction of several acoustic waves with even a single optical channel. Bit-error-rate studies have been performed on an integrated-optic version of the acoustooptic filter and a crosstalk penalty of approximately 2 dB due to dual channel interference has been observed. The theoretical origin of this crosstalk is described and it is shown that a modest relaxation of channel spacing can effectively eliminate and crosstalk penalty.<>
Keywords :
acousto-optical devices; crosstalk; frequency division multiplexing; integrated optics; multiplexing equipment; optical communication equipment; optical filters; optical switches; WDM; acoustic waves; acoustically tuned optical filters; acoustooptic filter; bit error rate; channel spacing; coherent interchannel interference; crosstalk; crosstalk penalty; dual channel interference; integrated-optic version; multiple-wavelength switching; multiwavelength operation; narrow channel spacing; single optical channel; two channel wavelength switch; wavelength division multiplexing; wide tuning range; Acoustic beams; Channel spacing; Frequency conversion; Interchannel interference; Optical fiber filters; Optical filters; Optical mixing; Optical sensors; Radio frequency; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
