Optical communications – Transmitter – Having particular modulation
Reexamination Certificate
2011-01-25
2011-01-25
Sedighian, M. R. (Department: 2613)
Optical communications
Transmitter
Having particular modulation
C398S155000, C398S209000
Reexamination Certificate
active
07877019
ABSTRACT:
A receiver for a differentially phase shift keying formatted optical signal, such as an RZ-DPSK formatted optical signal. Dither control loops are provided for controlling path length in a demodulator and/or for controlling the center wavelength of an optical band pass filter. A feedback loop is provided for controlling the gain of a pre-amplifier, and a method of protecting against optical transients by disabling a pre-amplifier is also provided. A preset delay may be provided to compensate for the differential delay in paths associated with the demodulator arms. When the signal is an RZ-DPSK modulated signal, a clock for retiming data from the optical signal may be derived from a signal on the data path.
REFERENCES:
patent: 4958926 (1990-09-01), Bu-Abbud
patent: 5027435 (1991-06-01), Chraplyvy et al.
patent: 5335109 (1994-08-01), Heidemann
patent: RE34769 (1994-11-01), Yoshimoto et al.
patent: 5475385 (1995-12-01), Pettitt et al.
patent: 5517351 (1996-05-01), Hatakeyama
patent: 5664131 (1997-09-01), Sugiya
patent: 5673142 (1997-09-01), Fatehi et al.
patent: 5854704 (1998-12-01), Grandpierre
patent: 5900968 (1999-05-01), Srivastava et al.
patent: 5923462 (1999-07-01), van der Plaats
patent: 6025941 (2000-02-01), Srivastava et al.
patent: 6038063 (2000-03-01), Tsuda et al.
patent: 6055094 (2000-04-01), Shima et al.
patent: 6259842 (2001-07-01), Giltner
patent: 6271959 (2001-08-01), Kim et al.
patent: 6396605 (2002-05-01), Heflinger et al.
patent: 6424458 (2002-07-01), Cornelius et al.
patent: 6466348 (2002-10-01), Izumi
patent: 6490080 (2002-12-01), Cornelius et al.
patent: 6522461 (2003-02-01), Cornelius et al.
patent: 6690884 (2004-02-01), Kelty et al.
patent: 6694104 (2004-02-01), Caplan et al.
patent: 6760142 (2004-07-01), Leuthold et al.
patent: 6762878 (2004-07-01), Park et al.
patent: 6765659 (2004-07-01), Bhatnagar et al.
patent: 6831523 (2004-12-01), Pastorello et al.
patent: 6941078 (2005-09-01), Onaka
patent: 7233399 (2007-06-01), Schlenk et al.
patent: 2002/0048069 (2002-04-01), Ibukuro
patent: 2003/0117698 (2003-06-01), Williams et al.
patent: 2003/0210917 (2003-11-01), Stewart et al.
patent: 2004/0213579 (2004-10-01), Chew et al.
patent: 2005/0047780 (2005-03-01), Hoshida et al.
patent: 2005/0088659 (2005-04-01), Schlenk et al.
patent: 2005/0191061 (2005-09-01), Liu et al.
patent: 2006/0067703 (2006-03-01), Haunstein et al.
patent: 0 502 386 (1992-09-01), None
patent: 0 933 887 (1999-08-01), None
patent: 2 301 723 (1996-12-01), None
International Search Report with Written Opinion dated Jul. 25, 2006 received in corresponding PCT Patent Application No. PCT/US05/47318 (9 pages).
EPO Examination Report dated May 2, 2005 received in corresponding EPO Application No. 02 257 191.3-1226 (5 pgs).
Office action from related Canadian application dated May 15, 2007 (2pgs).
Search Report from related EPO application dated Aug. 13, 2003 (3pgs).
Preliminary Examination Report from related EPO application dated Mar. 19, 2004 (3pgs).
Office Action from related EPO application dated May 2, 2005 (5pgs).
Office Action from related Singaporean application dated Mar. 4, 2008.
Australian Patent Office Written Opinion dated Apr. 8, 2009 issued in related Singapore Patent Application No. 200704819-2.
Australian Office Action dated Jun. 25, 2009 issued in related Australian Patent Application No. 2005322915.
Office Action dated Jan. 25, 2010 issued in related Singapore Patent Application No. 200704819-2.
Office Action dated Jan. 8, 2010 issued in related Chinese Patent Application No. 200580047297.6.
Supplemental European Search Report dated Dec. 30, 2010 issued in related European Patent Application No. 05855814.9.
Office Action dated Feb. 24, 2010 issued in related European Patent Application No. 05855814.9.
Swanson, etal., “High Sensitivity Optically Preamplified Direct Detection DPSK Receiver with Active Delay-Line Stabilization,” 8342 IEEE Photonics Technology Letters Feb. 6, 1994, No. 2, pp. 263-265.
Grossman Tucker Perreault & Pfleger PLLC
Sedighian M. R.
Tyco Electronics Subsea Communications LLC
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