Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2011-06-07
2011-06-07
Nguyen, Tu T (Department: 2886)
Optics: measuring and testing
For optical fiber or waveguide inspection
Reexamination Certificate
active
07956993
ABSTRACT:
A method of determining a mean square differential group delay associated with a length of optical fiber. The method including measuring a polarization mode dispersion vector as a function of frequency, using a frequency-domain polarization mode dispersion measurement apparatus. The method also including calculating a second-order polarization mode dispersion vector as a function of frequency by calculating a derivative of the polarization mode dispersion vector with respect to frequency. Also, calculating the mean of the magnitude of the second-order polarization mode dispersion vector to obtain a first result. Further, multiplying a proportionality coefficient by the first result to calculate the mean square differential group delay.
REFERENCES:
patent: 5717489 (1998-02-01), Ozeki et al.
patent: 5930414 (1999-07-01), Fishman et al.
patent: 5995228 (1999-11-01), Otani et al.
patent: 6011253 (2000-01-01), Hakki
patent: 6020584 (2000-02-01), Brarens et al.
patent: 6380533 (2002-04-01), Jopson et al.
patent: 6381385 (2002-04-01), Watley et al.
patent: 6459830 (2002-10-01), Pua et al.
patent: 6542650 (2003-04-01), Khosravani et al.
patent: 6556732 (2003-04-01), Chowdhury et al.
patent: 6647176 (2003-11-01), Pua et al.
patent: 6734955 (2004-05-01), Wight et al.
patent: 6867918 (2005-03-01), Damask
patent: 6946646 (2005-09-01), Chen et al.
patent: 7035538 (2006-04-01), Willner et al.
patent: 2003/0118263 (2003-06-01), Phua et al.
N. Gisin, et al., “How Accurately Can One Measure a Statistical Quantity Like Polarization-Mode Dispersion?”, IEEE Photonics Technology Letters, vol. 8, No. 12, Dec. 1996, pp. 1671-1673.
M. Shtaif, et al., “Study of the Frequency Autocorrelation of the Differential Group Delay in Fibers with Polarization Mode Dispersion”, Optics Letters, vol. 25, No. 10, May 15, 2000, pp. 707-709.
Normand Cyr, Andre Girard, and Gregory W. Schinn, “Stokes Parameter Analysis Method, the Consolidated Test Method for PMD Measurements”, NFOEC '99 Convention, Chicago, Ill. (1999).
R. M. Jopson, L. E. Nelson, H. Kogelnik, “Measurement of Second-Order Polarization-Mode Dispersion Vectors in Optical Fibers”, IEEE Phot. Tech. Lett, vol. 11, pp. 1153-1155 (Sep. 1999).
Foschini, et al., “Probability Densities of Second-Order Polarization Mode Dispersion Including Polarization Dependent Chromatic Fiber Dispersion,” IEEE Phot. Tech. Lett., vol. 12, pp. 293-295 (Mar. 2000).
N. Gisin, J.P. Von der Weid and J.P. Pellaux, “Polarization Mode Dispersion of Short and Long Single-Mode Fibers,” J. Lightw. Technol., vol. 9, p. 821 (1991).
Karlsson, Magnus., “Probability Density Functions of the Differential Group Delay in Optical Fiber Communication Systems,” Journal of Lightwave Technology, vol. 19, No. 3, pp. 324-331 (Mar. 2001).
Mecozzi, A., et al., “The Statistics of Polarization-Dependent Loss in Optical Communication Systems,” IEEE Photonics Technology Letters, vol. 14, No. 3, pp. 313-315 (Mar. 2002).
Williams, Paul A., “Mode-coupled artifact standard for polarization-mode dispersion: design, assembly, and implementation,” Applied Optics, vol. 38, No. 31, pp. 6498-6507 (Nov. 1, 1999).
Gisin, N., et al., “Definitions and Measurements of Polarization Mode Dispersion: Interferometric Versus Fixed Analyzer Methods,” IEEE Photonics Technology Letters, vol. 6, No. 6, pp. 730-732 (Jun. 1994).
Foschini, G.J., et al., “Statistical Theory of Polarization Dispersion in Single Mode Fibers,” Journal of Lightwave Technology, vol. 9, No. 11, pp. 1439-1456 (Nov. 1991).
Allen, Christopher T., et al., “Measured Temporal and Spectral PMD Characteristics and Their Implications for Network-Level Mitigation Approaches,” Journal of Lightwave Technology, vol. 21, No. 1, pp. 79-86 (Jan. 2003).
Fogal, Sarah L., et al., “Multiple Importance Sampling for First- and Second-Order Polarization-Mode Dispersion,” IEEE Photonics Technology Letters, vol. 14, No. 9, pp. 1273-1275 (Sep. 2002).
Sunnerud, Henrik, et al., “Polarization-Mode Dispersion in High-Speed Fiber-Optic Transmission Systems,” Journal of Lightwave Technology, vol. 20, No. 12, pp. 2204-2219 (Dec. 2002).
Boroditsky, Misha, et al., “In-Service Measurements of Polarization-Mode Dispersion and Correlation to Bit-Error Rate,” IEEE Photonics Technology Letters, vol. 15, No. 4, pp. 572-574 (Apr. 2003).
Boroditsky Mikhail
Brodsky Mikhail
Frigo Nicholas J.
Magill Peter
AT&T Intellectual Property II, LP
Hoffman & Baron LLP
Nguyen Tu T
LandOfFree
Method for increasing accuracy of measurement of mean... 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 for increasing accuracy of measurement of mean..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for increasing accuracy of measurement of mean... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2744099