期刊
OPTICS EXPRESS
卷 29, 期 15, 页码 22922-22930出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.430168
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资金
- National Natural Science Foundation of China (NSFC) [U1831115, U1931206, U2031130, U2031132]
- Chinese Academy of Sciences (CAS) [U1831115, U1931206, U2031130, U2031132]
- National Natural Science Foundation of China [11704086, 61775044]
- Natural Science Foundation of Heilongjiang Province [ZD2019H003]
- Project of Shandong Province Higher Educational Youth Innovation Science and Technology Program [2019KJJ011]
- Fundamental Research Funds for the Central Universities
A novel embedded ultra-long period fiber grating (EULPFG) based on a graded index multimode fiber (GI-MMF) is proposed for temperature measurement, showing high temperature sensitivity while being insensitive to refractive index, strain, and bending. It is expected to be used in ocean monitoring systems for measuring seawater temperature with minimal interference from other parameters.
A novel embedded ultra-long period fiber grating (EULPFG) based on a graded index multimode fiber (GI-MMF) is proposed for temperature measurement. Due to the small RI difference of the modes near the GI-MMF self-imaging point, the resonant peak of transmission spectrum is wavelength-insensitive to refractive index (RI), strain and bending. However, the sensor is sensitive to temperature. The experimental results show that the temperature sensitivity of the EULPFG is 90.77 pm/degrees C. The sensitivities of other physical parameters are suppressed, and the suppressed sensitivities are at least one order of magnitude less than those of similar sensors. The EULPFG with anti-interference from other parameters is expected to be used in ocean monitoring systems to measure the temperature of the seawater. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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