Hybrid Long-Period Fiber Grating with Multimode Fiber Core for Refractive Index Measurement
A refractive index （RI） sensor based on hybrid long-period fiber grating （LPFG） with multimode fiber core （MMFC） is proposed and demonstrated. The surrounding RI can be determined by monitoring the separation between the resonant wavelengths of the LPFG and MMFC since the resonant wavelengths of the...
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| Published in | Chinese physics letters Vol. 34; no. 11; pp. 41 - 44 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.11.2017
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| Online Access | Get full text |
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| Summary: | A refractive index （RI） sensor based on hybrid long-period fiber grating （LPFG） with multimode fiber core （MMFC） is proposed and demonstrated. The surrounding RI can be determined by monitoring the separation between the resonant wavelengths of the LPFG and MMFC since the resonant wavelengths of the LPFG and MMFC will shift in opposite directions when the surrounding RI changes. Experimental results show that the sensor possesses an enhanced sensitivity of 526.92nm/RIU in the RI range of 1.387-1.394 RIU. The response to the temperature is also discussed. |
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| Bibliography: | A refractive index （RI） sensor based on hybrid long-period fiber grating （LPFG） with multimode fiber core （MMFC） is proposed and demonstrated. The surrounding RI can be determined by monitoring the separation between the resonant wavelengths of the LPFG and MMFC since the resonant wavelengths of the LPFG and MMFC will shift in opposite directions when the surrounding RI changes. Experimental results show that the sensor possesses an enhanced sensitivity of 526.92nm/RIU in the RI range of 1.387-1.394 RIU. The response to the temperature is also discussed. 11-1959/O4 Min Shao1,4, Xue-Guang Qiao2, Xue-Liang Ren3, De-Xing Yang4 （1School of Science, Xi＇an Shiyou University, Xi＇an 710065 ; 2 School of Physics, Northwest University, Xi＇an 710069 ;3Key Laboratory of Functional Crystals and La.ser Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing 100190 ; 4 Department of Physics, Northwestern Polytechnical University, Xi＇an 710069） |
| ISSN: | 0256-307X 1741-3540 |
| DOI: | 10.1088/0256-307X/34/11/114205 |