Remotely controlled optical time domain reflectometer serving a

Optics: measuring and testing – For optical fiber or waveguide inspection

Patent

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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.

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