Optical waveguides – With optical coupler – Input/output coupler
Patent
1993-05-04
1995-03-28
Healy, Brian
Optical waveguides
With optical coupler
Input/output coupler
385 12, 385 38, 385 85, 385 88, 385115, 385116, 385133, 25022711, 25022714, 2502272, 250577, 73800, G02B 606, H01J 516, G01L 124
Patent
active
054025087
ABSTRACT:
A fiber optic probe for detecting scattered light, with transmitting and receiving fibers having slanted ends and bundled together to form a bevel within the tip of the probe. The probe comprises a housing with a transparent window across its tip for protecting the transmitting and receiving fibers held therein. The endfaces of the fibers are slanted, by cutting, polishing and the like, so that they lie in a plane that is not perpendicular to the longitudinal axis of the respective fiber. The fibers are held in the tip of the probe using an epoxy and oriented so that lines normal to the slanted endfaces are divergent with respect to one another. The epoxy, which is positioned substantially between the transmitting and receiving fibers, is tapered so that the transmitting fiber, the epoxy and the receiving fiber form a bevel of not more than 20 degrees. The angled fiber endfaces cause directing of the light cones toward each other, resulting in improved light coupling efficiency. A light absorber, such as carbon black, is contained in the epoxy to reduce crosstalk between the transmitting and receiving fibers.
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Livingston Ronald R.
O'Rourke Patrick E.
Dixon Harold M.
Healy Brian
Moser William R.
The United States of America as represented by the United States
Tumm Brian R.
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