Optical-fiber inspection device

Details Optical-fiber inspection device Optical-fiber inspection device

1998-03-16

1999-12-28

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022712, H01J 516

Patent

active

060084871

ABSTRACT:
In the primary invention of this application, an optical-fiber inspection device which detects the distance to a reflection point within the DUT and the amount of reflected light by dividing into two a laser beam which is possible to be frequency-swept, making one of the divided light beams incident to an optical detector via the reference light path, while making the other of the divided light beams incident to the DUT and making the light reflected within the DUT incident to the said optical detector, and analyzing the frequency of the interference signal for the two beams obtained by the optical detector, is configured so that the final reference light is obtained by providing an optical coupler in the reference light path and, after taking out a part of the reference light and making it pass through an optical frequency shifter, combining this again with the original reference light with the said optical coupler.

REFERENCES:
patent: 5315993 (1994-05-01), Alcala

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