Reduction of four-wave mixing crosstalk in WDM systems using unequally spaced channels

Crosstalk due to four-wave mixing (FWM) is the dominant nonlinear effect in long-haul multichannel optical communication systems employing dispersion-shifted fiber. A technique to design the channel frequency allocation in order to minimize the crosstalk due to FWM is presented. It is shown that sui...

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Bibliographic Details
Published in:IEEE photonics technology letters 1994-06, Vol.6 (6), p.754-756
Main Authors: Forghieri, F., Tkach, R.W., Chraplyvy, A.R., Marcuse, D.
Format: Article
Language:English
Subjects:
Applied sciences
Bandwidth
Exact sciences and technology
Fiber nonlinear optics
Four-wave mixing
Frequency
Optical crosstalk
Optical distortion
Optical fiber dispersion
Optical mixing
Radio spectrum management
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Wavelength division multiplexing
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Summary:Crosstalk due to four-wave mixing (FWM) is the dominant nonlinear effect in long-haul multichannel optical communication systems employing dispersion-shifted fiber. A technique to design the channel frequency allocation in order to minimize the crosstalk due to FWM is presented. It is shown that suitable unequal channel separations can be found for which no four-wave mixing product term is superimposed on any of the transmitted channels. This is obtained at the expense of some expansion of the system bandwidth. Simulations are presented to show the effectiveness of this technique in a 10-channel, 10-Gb/s per channel, system.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.300184