Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1988-10-04
1989-10-24
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
G01N 2188
Patent
active
048757721
ABSTRACT:
This application discloses a system in which a single optical time domain reflector is used to monitor a plurality of cables. In one embodiment two lasers having different wavelengths are separately fired into different cables, and the returning signals are fed into the appropriate port of a wavelength dependent coupler. In another embodiment, each laser simultaneouly checks two cables having different lengths, the length difference permitting identification of the cable in which a fault has occurred.
REFERENCES:
patent: 4737026 (1988-04-01), Dalgoutte et al.
Laser Precision Corporation
McGraw Vincent P.
Plante Thomas J.
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