Optical communications – Receiver – Including postcompensation
Reexamination Certificate
2006-12-06
2010-10-19
Curs, Nathan M (Department: 2613)
Optical communications
Receiver
Including postcompensation
C398S159000
Reexamination Certificate
active
07817925
ABSTRACT:
An optical signal, which is a low-speed signal superimposed on a high-speed phase modulated optical signal by intensity modulation, is used. In an optical receiver apparatus40, a received signal is split, and one of the split signals is O/E converted and low frequency component alone is extracted via a filter46. A clock is extracted from low-frequency component by CDR, and is compared with a preset frequency. Using the frequency difference obtained, dispersion compensation is performed with low accuracy. Next, the amount of phase control of the delay interferometer21is adjusted so that the amplitude of the electrical signal is maximized. An error rate is measured, and fine adjustment is performed to improve the error rate.
REFERENCES:
patent: 5717510 (1998-02-01), Ishikawa et al.
patent: 5754322 (1998-05-01), Ishikawa et al.
patent: 5760937 (1998-06-01), Ishikawa et al.
patent: 5815294 (1998-09-01), Ishikawa et al.
patent: 5870213 (1999-02-01), Ishikawa et al.
patent: 5896217 (1999-04-01), Ishikawa et al.
patent: 5909297 (1999-06-01), Ishikawa et al.
patent: 5991477 (1999-11-01), Ishikawa et al.
patent: 2003/0002112 (2003-01-01), Hirano et al.
patent: 2003/0007216 (2003-01-01), Chraplyvy et al.
patent: 2004/0213578 (2004-10-01), Takahara et al.
patent: 2004/0223769 (2004-11-01), Hoshida
patent: 2007/0047964 (2007-03-01), Ooi et al.
patent: 2007/0189779 (2007-08-01), Murphy et al.
patent: 2 370 473 (2002-06-01), None
patent: 8-321805 (1996-12-01), None
patent: 2000-115077 (2000-04-01), None
patent: 2003-60580 (2003-02-01), None
patent: WO 02/51041 (2002-06-01), None
Fukumitsu Katsumi
Honda Toshiki
Kunimatsu Kazuhiro
Ono Takeshi
Ozaki Masakazu
Curs Nathan M
Fujitsu Limited
Staas & Halsey , LLP
LandOfFree
High-speed dispersion compensation control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-speed dispersion compensation control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-speed dispersion compensation control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4182351