Simultaneous Refractive Index and Temperature Measurement With LPFG and Liquid-Filled PCF

Authors :: Kaiming Yang
Yiping Wang
Guolu Yin
Xiaoyong Zhong
Shen Liu
Yingjie Liu
Jian Tang
Bing Sun
Qiao Wang
Changrui Liao
Source :: IEEE Photonics Technology Letters. 27:375-378
Publication Year :: 2015
Publisher :: Institute of Electrical and Electronics Engineers (IEEE), 2015.
Abstract: We proposed and demonstrated a novel scheme for simultaneous measurement of temperature and refractive index (RI) by cascading a liquid-filled photonics crystal fiber (PCF) to a long period fiber grating (LPFG) written in a single-mode fiber. The liquid-filled PCF showed a high-temperature sensitivity of 1.695 nm/°C, which is two orders of magnitude higher than that of the LPFG (0.0642 nm/°C). The LPFG exhibited a blue shift with the increased RI. In contrast, liquid-filled PCF showed a total immunity to the surrounding RI. So, the temperature was solely measured by the liquid-filled PCF, and the RI information was extracted from the total response of the LPFG with the temperature effect having been compensated by the liquid-filled PCF.

Subjects :: All-silica fiber
Materials science
business.industry
Long-period fiber grating
Graded-index fiber
Temperature measurement
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Optics
Fiber Bragg grating
Optoelectronics
Fiber
Electrical and Electronic Engineering
business
Refractive index
Photonic-crystal fiber

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