Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Patent
1997-12-15
1999-09-07
Bovernick, Rodney
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
332145, G02F 1035
Patent
active
059499265
ABSTRACT:
An apparatus for implementing post-detection dispersion compensation on a minimum-phase optical single sideband signal propagating along an optical fiber, in which the optical fiber induces phase distortion on the minimum-phase optical single sideband signal. The apparatus comprises a first envelope detector adapted to be coupled with the optical fiber and having as output an envelope signal representing the envelope of the minimum-phase optical single sideband signal, a phase synthesizer connected to the output of the first envelope detector for generating a phase signal representing the phase of the minimum-phase optical single sideband signal, a combiner having as input the envelope signal and the phase signal and having as output a complex signal whose phase is obtained from the phase signal and whose amplitude is obtained from the envelope signal, a complex antidispersive filter connected to receive the complex signal and configured to remove optical fiber induced phase distortion from the complex signal to produce a filtered output; and a second envelope detector connected to the complex antidispersive filter to recover an information signal from the filtered output. A corresponding method of post-detection dispersion compensations is also disclosed.
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Bovernick Rodney
Telecommunications Research Laboratories
Wise Robert E.
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