Chromatic dispersion measurement

Details Chromatic dispersion measurement Chromatic dispersion measurement

2006-03-21

2006-03-21

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

07016023

ABSTRACT:
The present invention relates to a method and to an apparatus for measuring an optical property, such as group delay or chromatic dispersion, of a DUT, comprising: a first coupler connected to the DUT for coupling a first optical signal having a first wavelength and a second optical signal having a second wavelength into the DUT, the second wavelength being variable with respect to the first wavelength, a detector connected to the DUT for detecting the first and the second signal leaving the DUT, an evaluation unit connected to the detector, for determining a difference in runtime, if any, between the first and the second signal having traveled at least one time through the DUT and for deriving the optical property from the detected difference.

REFERENCES:
patent: 5969806 (1999-10-01), Bergano
patent: 6654104 (2003-11-01), Kimura et al.
patent: 6781678 (2004-08-01), Aoki et al.
patent: 2002/0044274 (2002-04-01), Kimura et al.
patent: 1211499 (2002-06-01), None
patent: WO 02/16901 (2002-02-01), None
Deragon et al., “An Analysis and Comparison of OTDR, Photon Counting and Differential Phase Shift Techniques for Field Chromatic Dispersion Measurements”, National Fiber Optics Engineers Conference, Technical Proceedings, 2001, pp. 1585-1594.
“An Analysis and Comparison of OTDR, Photon Counting and Differential Phase Shift Techniques for Field Chromatic Dispersion Measurements”, Aaron T. Deragon, et al., NOFOEC 2001, pp. 1585-1594.

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