Method and an arrangement for fault location in a glass fibre op

Details Method and an arrangement for fault location in a glass fibre op Method and an arrangement for fault location in a glass fibre op

1975-12-04

1978-01-24

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

250572, 356239, G01N 2116, G01N 2132

Patent

active

040701182

ABSTRACT:
A method of fault location in a glass fibre optical waveguide comprises using a laser device to provide pulses of light, feeding the light pulses into a glass fibre optical waveguide, feeding light pulses reflected from the fault in the glass fibre waveguide into the laser device in which their character is changed and determining the location of the fault from the known propagation time of the reflected pulses.
The invention also includes an arrangement for carrying out this method.

REFERENCES:
patent: 3884585 (1975-05-01), Leoduska
patent: 3952265 (1976-04-01), Hunsperger
patent: 3981592 (1976-09-01), Williams
"A Laser . . . Mixer-Oscillator;" Judd; J. of Sci. Inst.; (Jour. of Physice E); 7-68; Rudd; p. 723.
Pinpointing Cable Faults; Allan; Post Office Telecommun. J. (GB) vol. 22, No. 4; 1970-1971; pp. 5-7.

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