Optical communications – Diagnostic testing – Fault location
Reexamination Certificate
2007-04-03
2007-04-03
Singh, Dalzid (Department: 2613)
Optical communications
Diagnostic testing
Fault location
C398S017000, C398S026000, C398S027000
Reexamination Certificate
active
10173752
ABSTRACT:
A monitoring system includes first and second evaluation sections for obtaining an averaged Q-factor parameter and a waveform distortion parameter from an optical signal amplitude histogram collected from optical signals under measurement. The monitoring system further includes a third evaluation section for determining both averaged Q-factor parameter and waveform distortion parameter, and for making a decision as to whether the main factor of the optical signal quality degradation is waveform distortion or not by comparing the averaged Q-factor parameter and waveform distortion parameter with their initial values or initial characteristics which are obtained when no optical signal quality degradation is present.
REFERENCES:
patent: 2002/0044322 (2002-04-01), Blumenthal et al.
patent: 2002/0048060 (2002-04-01), Laham et al.
patent: 2002/0122220 (2002-09-01), Robinson et al.
patent: 0 920 150 (1999-06-01), None
patent: HEI 11-118614 (1999-04-01), None
patent: HEI 11-223575 (1999-08-01), None
patent: 2000-001047 (2001-07-01), None
patent: 2000-012240 (2001-07-01), None
Shake et al., “Optical Signal Quality Monitor Using Averaged Q-factor Evaluation with Amplitude Histograms,” IEICE Technical Research Report, vol. 99, No. 605, The Institute of Electronics and Information Communication Engineers (published Feb. 4, 2000), pp. 55 to 60.
Shake et al., “Bitrate Flexible Optical Signal Quality Monitoring Using Amplitude Histograms Evaluation,” 2000 IEICE Communication Society Transactions, vol. 2 (issued Sep. 7, 2000), pp. 492-493.
Shake et al., “Optical Signal Quality Monitor Using Averaged Q-factor Evaluation of Signal with Dispersion in Transmission Fiber,” 1999 IEICE Communication Society Transactions, vol. 2 (issued: Aug. 16, 1999). p. 251.
Shake et al., “Optical Signal Quality Monitoring Method Based on Averaged Q-factor Measurement Optical Sampling,” 1999 IEICE General Convention Transactions, Communication (2) (issued Mar. 8, 1999), p. 529.
Japanese Patent Office Official Notice of Rejection for Application No. 2002-172035, mailed Dec. 14, 2004.
Ippei Shake, et al., “Quality Monitoring of Optical Signals Influenced by Chromatic Dispersion in a Transmission Fiber Using Averaged Q-Factor Evaluation,” IEEE Photonics Technology Letters, vol. 13, No. 4, Apr. 2001, pp. 385-387.
I. Shake, et al., “Optical Signal Quality Monitoring Method Based on Optical Sampling,” Electronics Letters, Oct. 29, 1998, vol. 34, No. 22 (2 pages).
N. Hanik, et al., “Application of Amplitude Histograms to Monitor Performance of Optical Channels,” Electronics Letters, Mar. 4, 1999, vol. 35, No. 5 (2 pages).
K. Mueller, et al., “Application of Amplitude Histograms for Quality of Service Measurements of Optical Channels and Fault Identification,” ECOC 98, Sep. 20-24, 1998, Madrid, Spain, XP-000887223, pp. 707-708.
European Patent Office Search Report for Application No. 02254429.0, Feb. 16, 2004.
European Patent Office Action issued in European Patent Application No. 02254429.0, May 3, 2005.
“Subpicosecond Optical Sampling Gate,” IBM Technical Disclosure Bulletin, New York, vol. 29, No. 5, Oct. 5, 1986, pp. 1968-1969.
Shake, I. et al., “Quality Monitoring of Optical Signals Influenced by Chromatic Dispersion in a Transmission Fiber Using Averaged Q-Factor Evaluation,” IEEE Photonics Technology Letters, IEEE Inc., New York, vol. 13, No. 4, Apr. 2001, pp. 385-387.
“Overhead Bytes Description”, ITU-T, Recommendation G.707 pp. 51-66, (Mar. 1996).
Takara, H. et al., “100 Gbit/S Optical Signal Eye-Diagram Measurement With Optical Sampling Using Organic Nonlinear Optical Crystal”, Electronics Letters, vol. 32, No. 24, pp. 2256-2258, (Nov. 1996).
Marcuse, D. “Derivation of Analytical Expressions for the Bit -Error Probability in Lightwave Systems with Optical Amplifiers”, IEEE Journal of Lightwave Technology, vol. 8, No. 12, pp. 1816-1823, (Dec. 1990).
Shake, I. et al., “Determination of the Origin of BER Degradation Utilizing Asynchronous Amplitude Histograms”, Communications Society Conference of IEICE, pp. II-560-II-561 (2001).
Shake, I. et al., “Optical Performance Monitoring and Control”, (OFC), pp. 19-21(Mar. 19, 2002).
Shake Ippei
Takara Hidehiko
Uchiyama Kentaro
Finnegan Henderson Farabow Garrett & Dunner LLP
Nippon Telegraph and Telephone Corporation
Singh Dalzid
LandOfFree
Method and system for determining origin of optical signal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for determining origin of optical signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for determining origin of optical signal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3787747