Fabry-Perot Interferometer Fabricated on a Ceramic Coaxial Cable for Temperature Sensing


Coaxial cable Fabry-Perot interferometer has been reported as a temperature sensor by drill two holes on a coaxial cable. For high temperature applications, traditional flexible cable will not deliver any signal due to the low melting point of the dielectrics. Ceramic coaxial cable can withstand high temperature, but drilling holes is not good enough to create reflectors for use in a interferometer. In this paper, we propose a method of filling the drilled holes with conductive materials to increase the reflection. The influences of the hole drilling and the material filling are studied. The resulted sensor is then tested in a furnace. The sensor can withstand as high as 650 degree celcius before abnormal behavior. The temperature response below 300 degree celcius is relatively flat, maybe due to the conflicting properties of the material when temperature rising. It is also possible that the flat behavior under 300C can be utilized as a temperature insensitive device to measure stress or other parameters.

Meeting Name

Joint Conference: MFPT 2015 and ISA's 61st International Instrumentation Symposium - Technology Evolution: Sensors to Systems for Failure Prevention (2015: May 12-14, Huntsville, AL)


Electrical and Computer Engineering

Keywords and Phrases

Cables; Ceramic materials; Coaxial cables; Conductive materials; Fabry-Perot interferometers; High temperature applications; Interferometers; Machinery; Abnormal behavior; Drilling holes; High temperature; Low melting point; Temperature response; Temperature rising; Temperature sensing; Temperature-insensitive, Temperature sensors

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


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© 2015 International Society of Automation (ISA), All rights reserved.

Publication Date

01 May 2015