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Proceedings Paper

The effectiveness of metal coating on FBG sensor sensitivity at cryogenic temperature
Author(s): C. Lupi; F. Felli; M. A. Caponero; A. Paolozzi
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Paper Abstract

The very low thermal expansion coefficient of silica at cryogenic temperature prevents the use of Fibre Bragg Grating (FBG) sensors for high resolution temperature monitoring in cryogenic environments involving liquid gases or space applications. To overcome such limitations sensors have been coated with different metals to improve the measurement sensitivity in the very low temperature region, i.e. 4.2-35 K. Various coatings have been deposited by electrowinning on the external fibre surface after aluminium pre-coating. Full characterization of this new type of sensor is described in the paper.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 661916 (2 July 2007); doi: 10.1117/12.738383
Show Author Affiliations
C. Lupi, Univ. di Roma La Sapienza (Italy)
F. Felli, Univ. di Roma La Sapienza (Italy)
M. A. Caponero, ENEA C.R. Frascati (Italy)
A. Paolozzi, Univ. di Roma La Sapienza (Italy)

Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors

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