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Title: Intrinsic Fabry-Perot optical fiber sensors and their multiplexing

Abstract

An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. When light is launched into the fiber, two reflections are generated at the two fiber/thin film interfaces due to a difference in refractive indices between the fibers and the film, giving rise to the sensor output. In another embodiment, a portion of the cladding of a fiber is removed, creating two parallel surfaces. Part of the evanescent fields of light propagating in the fiber is reflected at each of the surfaces, giving rise to the sensor output. In a third embodiment, the refractive index of a small portion of a fiber is changed through exposure to a laser beam or other radiation. Interference between reflections at the ends of the small portion give rise to the sensor output. Multiple sensors along a single fiber are multiplexed using an optical time domain reflectometry method.

Inventors:
 [1]
  1. Blacksburg, VA
Issue Date:
Research Org.:
Virginia Tech Intellectual Properties, Inc. (Blacksburg, VA)
Sponsoring Org.:
USDOE
OSTI Identifier:
920997
Patent Number(s):
7308162
Application Number:
10/656,256
Assignee:
Virginia Tech Intellectual Properties, Inc. (Blacksburg, VA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01L - MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
DOE Contract Number:  
FT36-01G011-50
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Anbo. Intrinsic Fabry-Perot optical fiber sensors and their multiplexing. United States: N. p., 2007. Web.
Wang, Anbo. Intrinsic Fabry-Perot optical fiber sensors and their multiplexing. United States.
Wang, Anbo. Tue . "Intrinsic Fabry-Perot optical fiber sensors and their multiplexing". United States. https://www.osti.gov/servlets/purl/920997.
@article{osti_920997,
title = {Intrinsic Fabry-Perot optical fiber sensors and their multiplexing},
author = {Wang, Anbo},
abstractNote = {An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. When light is launched into the fiber, two reflections are generated at the two fiber/thin film interfaces due to a difference in refractive indices between the fibers and the film, giving rise to the sensor output. In another embodiment, a portion of the cladding of a fiber is removed, creating two parallel surfaces. Part of the evanescent fields of light propagating in the fiber is reflected at each of the surfaces, giving rise to the sensor output. In a third embodiment, the refractive index of a small portion of a fiber is changed through exposure to a laser beam or other radiation. Interference between reflections at the ends of the small portion give rise to the sensor output. Multiple sensors along a single fiber are multiplexed using an optical time domain reflectometry method.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {12}
}

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Works referenced in this record:

Formation of Bragg gratings in optical fibers by a transverse holographic method
journal, January 1989


Photosensitivity in optical fiber waveguides: Application to reflection filter fabrication
journal, May 1978