Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2005-01-04
2005-01-04
Nguyen, Tu T. (Department: 2877)
Optics: measuring and testing
For optical fiber or waveguide inspection
Reexamination Certificate
active
06839129
ABSTRACT:
A polarization mode dispersion (PMD) compensator for compensation of PMD in polarization bit interleaved (PBI) optical signals is disclosed. The control uses spectral analysis of components of the electrical output, particularly analysis of a spectral component having a frequency corresponding to the bit frequency of the two bit streams which form the bit interleaved signal. Minimising this spectral component results in alignment of the signal in the system at 45 degrees to the two principal axes. An apparatus for measuring PMD based on spectral analysis is also disclosed.
REFERENCES:
patent: 6330375 (2001-12-01), Fishman et al.
patent: 1 109 338 (2001-06-01), None
Takahashi T et al: “Automatic Compensation Technique for Timewise Fluctuating Polarisation Mode Dispersion in In-Line Amplifier Systems”, Electronics Letters, Feb. 17, 1994, vol. 30, No. 4, pp. 348-349.
Ishikawa G et al: “Polarization-Mode Dispersion Sensitivity and Monitoring in 40-Gbit/s OTDM and 10-Gbit/s NRZ Transmission Experiment”, OFC '98 Technical Digest, 1998, pp. 117-118.
Kikuchi N: “Analysis of Signal Decree of Polarization Degradation Used as Control Signal for Optical Polarization Mode Dispersion Compensation” Journal of Lightwave Technology, IEEE, New York, US, vol. 19, No. 4, Apr. 2001.
Barnes & Thornburg LLP
Nguyen Tu T.
Nortel Networks Limited
LandOfFree
PMD measurement and compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with PMD measurement and compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PMD measurement and compensation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3396716