Remote sensing in optical fiber networks by synchronously detect

Details Remote sensing in optical fiber networks by synchronously detect Remote sensing in optical fiber networks by synchronously detect

1993-08-10

1995-01-24

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

25022717, 25022721, G01N 2184, G01N 2121

Patent

active

053846354

ABSTRACT:
The occurrence and location of a disturbance in the vicinity of a localized portion of an optical fiber are determined based on the recognition that such a disturbance changes the polarization condition of signals backscattered from the disturbed portion. Thus, multiple consistently polarized optical pulses are applied to an input end of the fiber and only signals of a particular polarization that are backscattered from the disturbed portion are abstracted from the input end. An output signal indicative of the disturbance is generated by processing these backscattered signals in accordance with synchronous detection techniques.

REFERENCES:
patent: 4904863 (1990-02-01), McDearmon
A. J. Rogers, "Polarization-Optical Time Domain Reflectometry: A Technique for the Measurement of Field Distributions", Mar. 15, 1981, pp. 1060-1074, Applied Optics, vol. 20, No. 6.

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