DOI: 10.17586/1023-5086-2021-88-02-58-65

All-fiber temperature and refractive index sensor based on cascaded tilted Bragg grating and Bragg grating

Fang, Y., He, W., Meng, F., Zhang, W., Zhang, K., Zhao, H., Zhu, L.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Yitao Fang, Wei He, Wen Zhang, Fanyong Meng, Lianqing Zhu, Kun Zhang, Hong Zhao All-fiber temperature and refractive index sensor based on cascaded tilted Bragg grating and Bragg grating (Полностью волоконный датчик изменений температуры и показателя преломления на основе последовательных наклонной и прямой брэгговских решёток) [на англ. яз.] // Оптический журнал. 2021. Т. 88. № 2. С. 58–65. http://doi.org/10.17586/1023-5086-2021-88-02-58-65

Yitao Fang, Wei He, Wen Zhang, Fanyong Meng, Lianqing Zhu, Kun Zhang, Hong Zhao All-fiber temperature and refractive index sensor based on cascaded tilted Bragg grating and Bragg grating (Полностью волоконный датчик изменений температуры и показателя преломления на основе последовательных наклонной и прямой брэгговских решёток) [in English] // Opticheskii Zhurnal. 2021. V. 88. № 2. P. 58–65. http://doi.org/10.17586/1023-5086-2021-88-02-58-65

For citation (Journal of Optical Technology):

Yitao Fang, Wei He, Wen Zhang, Fanyong Meng, Lianqing Zhu, Kun Zhang, and Hong Zhao, "All-fiber temperature and refractive index sensor based on a cascaded tilted Bragg grating and a Bragg grating," Journal of Optical Technology. 88(2), 100-105 (2021). https://doi.org/10.1364/JOT.88.000100

Abstract:

An all-fiber dual-parameter sensor based on cascaded tilted grating and Bragg grating for temperature and refractive index measurement was proposed. Both a fiber Bragg grating and a tilted Bragg grating are sensitive to temperature, but a fiber Bragg grating is not sensitive to refractive index. Therefore, through decoupling the cross sensitivity of temperature and refractive index, the sensor sensitivity matrix can be obtained. In the temperature range of fiber Bragg grating 25–300 °C, temperature sensitivities were 11.60 pm/°C for the fiber Bragg grating and 11.25 pm/°C for the tilted Bragg grating. NaCl solutions with concentration from 5 to 20% were used for the refractive index test, and the refractive index sensitivity was 0.833 nm/RIU for the tilted Bragg grating. The proposed sensor can be used for dual-parameters measurement, showing good application prospect and research reference value.

Keywords:

fiber Bragg grating, tilted fiber Bragg grating, fiber grating sensor, dual-parameter sensor

OCIS codes: 060.3735

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