Sensors 2012, 12(6), 7886-7892; doi:10.3390/s120607886
Article

A Temperature-Insensitive Cladding-Etched Fiber Bragg Grating Using a Liquid Mixture with a Negative Thermo-Optic Coefficient

1 Department of Optoelectronics, Honam University, Gwangju 506-714, Korea 2 Robot System Division, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-813, Korea
* Author to whom correspondence should be addressed.
Received: 28 April 2012; in revised form: 30 May 2012 / Accepted: 31 May 2012 / Published: 8 June 2012
(This article belongs to the Section Physical Sensors)
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Abstract: To compensate for the temperature dependency of a standard FBG, a cladding-etched FBG immersed with a liquid mixture having a negative thermo-optic coefficient is presented, and its characteristics are investigated. The Bragg wavelength of the cladding-etched FBG is shifted counter to the direction of the Bragg wavelength shift of a conventional FBG according to the mixing ratio of glycerin to water; thus, the temperature-dependent Bragg wavelength shift was almost compensated by using a liquid mixture of water (50%) and glycerin (50%) having the negative thermo-optic coefficient of −5 × 10−4 °C−1.
Keywords: temperature insensitive; cladding etched; Fiber Bragg grating; compensation; negative thermo-optic coefficient

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MDPI and ACS Style

Kim, K.T.; Kim, I.S.; Lee, C.-H.; Lee, J. A Temperature-Insensitive Cladding-Etched Fiber Bragg Grating Using a Liquid Mixture with a Negative Thermo-Optic Coefficient. Sensors 2012, 12, 7886-7892.

AMA Style

Kim KT, Kim IS, Lee C-H, Lee J. A Temperature-Insensitive Cladding-Etched Fiber Bragg Grating Using a Liquid Mixture with a Negative Thermo-Optic Coefficient. Sensors. 2012; 12(6):7886-7892.

Chicago/Turabian Style

Kim, Kwang Taek; Kim, In Soo; Lee, Cherl-Hee; Lee, Jonghun. 2012. "A Temperature-Insensitive Cladding-Etched Fiber Bragg Grating Using a Liquid Mixture with a Negative Thermo-Optic Coefficient." Sensors 12, no. 6: 7886-7892.

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