skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same

Abstract

A fiber optic probe is disclosed 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. 3 figures.

Inventors:
;
Issue Date:
Research Org.:
Westinghouse Savannah River Co
OSTI Identifier:
35075
Patent Number(s):
5,402,508
Application Number:
PAN: 8-056,390
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 440600; PA: EDB-95:065375; SN: 95001365534
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 28 Mar 1995
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; PROBES; DESIGN; VISIBLE RADIATION; RADIATION DETECTION; ORIENTATION; LIGHT TRANSMISSION; OPTICAL FIBERS

Citation Formats

O`Rourke, P.E., and Livingston, R.R. Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same. United States: N. p., 1995. Web.
O`Rourke, P.E., & Livingston, R.R. Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same. United States.
O`Rourke, P.E., and Livingston, R.R. Tue . "Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same". United States.
@article{osti_35075,
title = {Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same},
author = {O`Rourke, P.E. and Livingston, R.R.},
abstractNote = {A fiber optic probe is disclosed 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. 3 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {3}
}