Methods for identifying optical fibers which exhibit elevated le

Details Methods for identifying optical fibers which exhibit elevated le Methods for identifying optical fibers which exhibit elevated le

1998-08-13

1999-10-12

Evans, F. L.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2100

Patent

active

059662077

ABSTRACT:
Methods for identifying optical fibers which exhibit elevated levels of polarization mode dispersion (PMD) are provided. The methods employ difference traces obtained from optical time domain reflectometer (OTDR) measurements. The presence of a cyclical pattern in such a difference trace has been found to be indicative of a fiber having an elevated level of PMD.

REFERENCES:
patent: 5412745 (1995-05-01), Weidman et al.
patent: 5479251 (1995-12-01), Hanson
patent: 5518516 (1996-05-01), Garnham
C. Shaar, "Bumpy Fiber Effects", TIA 6.6.5 Standards Meeting, Jan. 24, 1995, pp. 19-29.
S. Lacroix et al., "All-fiber wavelength filter from successive biconical tapers", Optical Letters, 1986, vol. 11, No. 10, pp. 671-673.
A.C. Boucouvalas, "Biconical Taper Coaxial Optical Fibre Coupler", Electronics Letters, 1985, vol. 21, pp. 864-865.
Product description sheet entitled "Wavelength Filters with Tapered Optical Fibers".

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