Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2005-07-19
2005-07-19
Bovernick, Rodney (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
C385S122000, C065S475000
Reexamination Certificate
active
06920270
ABSTRACT:
A method for determining at least one parameter of a periodic spin function α(z) with period p, to be applied to an optical fiber along its length z during a drawing process. At least one parameter is selected so that (I) where ε1is about 0.05 and y1is the first of the three components y1(z), y2(z), y3(z) of a periodic function y(z) of period p such that (II) where LBis an expected beat length of said optical fiber and α(z) is the derivative of the spin function α(z) with respect to the length z. The method is effective for substantially reducing the PMD of optical fibers drawn when applying a spin function.
REFERENCES:
patent: 5298047 (1994-03-01), Hart, Jr. et al.
patent: 5418881 (1995-05-01), Hart, Jr. et al.
patent: 5822487 (1998-10-01), Evans et al.
patent: 5943466 (1999-08-01), Henderson et al.
patent: 5992181 (1999-11-01), Geertman
patent: 0 582 405 (1994-02-01), None
patent: WO 97/07067 (1997-02-01), None
patent: WO 97/26221 (1997-07-01), None
patent: WO 97/30945 (1997-08-01), None
patent: WO 99/67180 (1999-12-01), None
Curti, F. et al., “Statistical Treatment of the Evolution of the Principal States of Polarization in Single-Mode Fibers,” Journal of Lightwave Technology, vol. 8, No. 8, pp. 1162-1166, (Aug. 1990).
Heffner, B. L., “Attosecond-Resolution Measurement of Polarization Mode Dispersion in Short Sections of Optical Fiber,” Optics Letters, vol. 18, No. 24, pp. 2102-2104, (Dec. 15, 1993).
Poole, C. D. et al., “Dynamical Equation for Polarization Dispersion,” Optics Letters, vol. 16, No. 6, pp. 372-374, (Mar. 15, 1991).
Park, Y. et al., “Residual Stresses in a Doubly Clad Fiber with Depressed Inner Cladding(DIC),” Journal of Lightwave Technology, vol., 17, No. 10, pp. 1823-1834, (Oct. 1999).
Chowdhury, D. Q. et al., “Perturbation Model for Computing Optical Fiber Birefringence from a Two-Dimensional Refractive-Index Profile,” Optics Letters, vol., 20, No. 19, pp. 1973-1975, (Oct. 1, 1995).
Chowdhury, D. et al., “Comparison Between Optical Fiber Birefringence Induced by Stress Anisotropy and Geometric Deformation,” IEEE Journal of Selected Topics in Quantum Electronics, vol., 6, No. 2, pp. 227-232, (Mar./Apr. 2000).
Galtarossa, A. et al., “PMD Characterisation by Backscattered Field Polarisation Analysis,” WFOPC 2000, pp. 176-187, (Jun. 8-9, 2000).
Thévenaz, L. et al., “Evaluation of Local Birefringence Along Fibres Using Brillouin Analysis,” OFMC '97, 4THOptical Fibre Measurement Conference, pp. 82-85 (1997).
Marrone, M. J. et al., “Internal Rotation of the Birefringence Axes in Polarization-Holding Fibers,” Optics Letters, vol. 12, No. 1, pp. 60-62, (Jan. 1987).
Corsi, F. et al., “Analytical Treatment of Polarization-Mode Dispersion in Single-Mode Fibers by Means of the Backscattered Signal, ” J. Opt. Soc. Am. A, vol. 16, No. 3, pp. 574-583, (Mar. 1999).
Corsi, F. et al., “Beat Length Characterization Based on Backscattering Analysis in Randomly Perturbed Single-Mode Fibers,” Journal of Lightwave Technology, vol. 17, No. 7, pp. 1172-1178, (Jul. 1999).
Wai, P. K. A. et al., “Polarization Mode Dispersion, Decorrelation, and Diffusion in Optical Fibers with Randomly Varying Birefringence,” Journal of Lightwave Technology vol. 14, No. 2, pp. 148-157, (Feb. 1996).
Galtarossa Andrea
Palmieri Luca
Pizzinat Anna
Bovernick Rodney
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Kang Juliana K.
Pirelli Cavi e Sistemi S.p.A.
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