We proposed a poly-dimethylsiloxane (PDMS)-coated fiber Bragg grating (FBG) temperature sensor for enhancing temperature sensitivity. By embedding the bare FBG in a temperature-sensitive elastomeric polymer, the temperature sensitivity of the proposed structure could be effectively improved by 4.2 times higher than those of the conventional bare-type FBG sensors due to the high thermal expansion coefficient of the PDMS. We analyzed the temperature-sensitivity enhancement effect with the increased Bragg wavelength shift in our structure and dependence on the temperature sensitivity with respect to the cross-section area of the PDMS.
© 2011 Optical Society of Korea
(160.5470) Materials : Polymers
(230.3990) Optical devices : Micro-optical devices
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(280.4788) Remote sensing and sensors : Optical sensing and sensors
Original Manuscript: September 20, 2011
Revised Manuscript: October 12, 2011
Manuscript Accepted: October 17, 2011
Published: December 25, 2011
Chang-Sub Park, Kyung-Il Joo, Shin-Won Kang, and Hak-Rin Kim, "A PDMS-Coated Optical Fiber Bragg Grating Sensor for Enhancing Temperature Sensitivity," J. Opt. Soc. Korea 15, 329-334 (2011)
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