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Proceedings Paper

A polarisation maintaining fiber optimized for high temperature gyroscopes
Author(s): F. Tutu; Mark Hill; Laurence Cooper; A. Gillooly
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Paper Abstract

Fiber optic gyroscopes (FOGs) are being used within increasingly severe environments, requiring operational temperatures in excess of the standard operating range for FOGs. Applications requiring these higher temperatures include: directional drilling of wells in oil and gas fields, space applications and military FOG applications. This paper will describe the relative merits of two high temperature acrylate coatings for an optical fiber designed for a FOG in such operating environments. Results for two high temperature acrylates are presented, tested in a 200m length of loose wound fiber, coiled and supported at 75mm diameter, in line with TIA/EIA-455-192 (FOTP-192). It can be seen that both coating types give very good polarization extinction ratio (PER) performance at high temperature up to 180oC, with better performance shown by one coating type on the low temperature side, since it does not harden to the same extent below 0oC. The long term thermal exposure effects will be discussed and experimental results presented which include testing the PER performance over temperature both before and after an extended period of high temperature endurance. This will demonstrate the relative merits of different styles of coatings. From the PER performance, the h-parameter of the fiber can be calculated and hence the preferred coating type selected and recommended for the customer operating environment.

Paper Details

Date Published: 13 May 2015
PDF: 12 pages
Proc. SPIE 9480, Fiber Optic Sensors and Applications XII, 94800J (13 May 2015); doi: 10.1117/12.2176554
Show Author Affiliations
F. Tutu, Fibercore Ltd. (United Kingdom)
Mark Hill, Fibercore Ltd. (United Kingdom)
Laurence Cooper, Fibercore Ltd. (United Kingdom)
A. Gillooly, Fibercore Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 9480:
Fiber Optic Sensors and Applications XII
Gary Pickrell; Eric Udd; Henry H. Du, Editor(s)

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