Sensors | |
A Temperature-Insensitive Cladding-Etched Fiber Bragg Grating Using a Liquid Mixture with a Negative Thermo-Optic Coefficient | |
Kwang Taek Kim1  In Soo Kim1  Cherl-Hee Lee2  | |
[1] Department of Optoelectronics, Honam University, Gwangju 506-714, Korea;Robot System Division, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-813, Korea | |
关键词: temperature insensitive; cladding etched; Fiber Bragg grating; compensation; negative thermo-optic coefficient; | |
DOI : 10.3390/s120607886 | |
来源: mdpi | |
【 摘 要 】
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.
【 授权许可】
CC BY
© 2012 by the authors; licensee MDPI, Basel, Switzerland
【 预 览 】
Files | Size | Format | View |
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RO202003190043583ZK.pdf | 468KB | download |