Optical communications – Receiver – Including postcompensation
Reexamination Certificate
2006-10-17
2006-10-17
Vanderpuye, Kenneth (Department: 2613)
Optical communications
Receiver
Including postcompensation
C398S007000, C398S034000, C398S043000, C398S202000, C702S069000, C702S066000, C702S067000, C702S068000, C702S070000, C702S071000
Reexamination Certificate
active
07123845
ABSTRACT:
A receiving apparatus comprises a first waveform degradation compensating unit, a second waveform degradation compensating unit, a received waveform measuring unit for measuring waveform data on a received signal, a control unit for controlling compensation characteristics of the first and second waveform degradation compensating units to minimize a difference between frequency data obtained by converting the obtained received waveform data into a frequency domain and frequency data on a reference waveform free from waveform degradation, and time-constant generating units for making a difference in compensation characteristic control speed between the first and second waveform degradation compensating units. This realizes high-accuracy compensation for waveform degradation of a received signal stemming from chromatic dispersion, polarization mode dispersion or the like without employing a dispersion compensation fiber or a polarization maintaining fiber.
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Fujitsu Limited
Leung Danny Wai Lun
Staas & Halsey , LLP
Vanderpuye Kenneth
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