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Title: Optical fiber sensors for harsh environments

Abstract

A diaphragm optic sensor comprises a ferrule including a bore having an optical fiber disposed therein and a diaphragm attached to the ferrule, the diaphragm being spaced apart from the ferrule to form a Fabry-Perot cavity. The cavity is formed by creating a pit in the ferrule or in the diaphragm. The components of the sensor are preferably welded together, preferably by laser welding. In some embodiments, the entire ferrule is bonded to the fiber along the entire length of the fiber within the ferrule; in other embodiments, only a portion of the ferrule is welded to the fiber. A partial vacuum is preferably formed in the pit. A small piece of optical fiber with a coefficient of thermal expansion chosen to compensate for mismatches between the main fiber and ferrule may be spliced to the end of the fiber.

Inventors:
;
Issue Date:
Research Org.:
Virginia Tech Intellectual Properties, Inc., Blacksburg, VA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176098
Patent Number(s):
7173713
Application Number:
10/791,842
Assignee:
Virginia Tech Intellectual Properties, Inc.
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01L - MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
G - PHYSICS G01 - MEASURING G01K - MEASURING TEMPERATURE
DOE Contract Number:  
FC3601G01050
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Xu, Juncheng, and Wang, Anbo. Optical fiber sensors for harsh environments. United States: N. p., 2007. Web.
Xu, Juncheng, & Wang, Anbo. Optical fiber sensors for harsh environments. United States.
Xu, Juncheng, and Wang, Anbo. Tue . "Optical fiber sensors for harsh environments". United States. https://www.osti.gov/servlets/purl/1176098.
@article{osti_1176098,
title = {Optical fiber sensors for harsh environments},
author = {Xu, Juncheng and Wang, Anbo},
abstractNote = {A diaphragm optic sensor comprises a ferrule including a bore having an optical fiber disposed therein and a diaphragm attached to the ferrule, the diaphragm being spaced apart from the ferrule to form a Fabry-Perot cavity. The cavity is formed by creating a pit in the ferrule or in the diaphragm. The components of the sensor are preferably welded together, preferably by laser welding. In some embodiments, the entire ferrule is bonded to the fiber along the entire length of the fiber within the ferrule; in other embodiments, only a portion of the ferrule is welded to the fiber. A partial vacuum is preferably formed in the pit. A small piece of optical fiber with a coefficient of thermal expansion chosen to compensate for mismatches between the main fiber and ferrule may be spliced to the end of the fiber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {2}
}

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Works referenced in this record:

Fiber Fabry-Perot sensors for detection of partial discharges in power transformers
journal, January 2003