Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same
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.
- Inventors:
-
- Martinez, GA
- Aiken, SC
- Issue Date:
- Research Org.:
- Savannah River Site (SRS), Aiken, SC (United States)
- OSTI Identifier:
- 869809
- Patent Number(s):
- 5402508
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- fiber; optic; probe; fibers; endfaces; formed; improved; coupling; efficiency; method; detecting; scattered; light; transmitting; receiving; slanted; bundled; form; bevel; tip; comprises; housing; transparent; window; protecting; held; therein; cutting; polishing; lie; plane; perpendicular; longitudinal; axis; respective; epoxy; oriented; lines; normal; divergent; respect; positioned; substantially; tapered; 20; degrees; angled; directing; cones; resulting; absorber; carbon; black; contained; reduce; crosstalk; receiving fiber; transparent window; improved coupling; receiving fibers; scattered light; fiber optic; longitudinal axis; carbon black; optic probe; probe comprises; transmitting fiber; coupling efficiency; improved light; fibers held; detecting scattered; light absorber; /385/73/250/
Citation Formats
O'Rourke, Patrick E, and Livingston, Ronald 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, Patrick E, & Livingston, Ronald R. Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same. United States.
O'Rourke, Patrick E, and Livingston, Ronald R. Sun .
"Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same". United States. https://www.osti.gov/servlets/purl/869809.
@article{osti_869809,
title = {Fiber optic probe having fibers with endfaces formed for improved coupling efficiency and method using same},
author = {O'Rourke, Patrick E and Livingston, Ronald R},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1995},
month = {Sun Jan 01 00:00:00 EST 1995}
}