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 Polytechnic Inst. and State Univ. (Virginia Tech), 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. (Blacksburg, VA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01D - MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE
G - PHYSICS G01 - MEASURING G01K - MEASURING TEMPERATURE
- DOE Contract Number:
- FC36-01GO11050
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2004 Mar 04
- 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 = {Tue Feb 06 00:00:00 EST 2007},
month = {Tue Feb 06 00:00:00 EST 2007}
}
Works referenced in this record:
Fiber Fabry-Perot sensors for detection of partial discharges in power transformers
journal, January 2003
- Yu, Bing; Kim, Dae Woong; Deng, Jiangdong
- Applied Optics, Vol. 42, Issue 16