期刊
IEEE SENSORS JOURNAL
卷 19, 期 14, 页码 5645-5652出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2019.2905635
关键词
Optical fiber sensor; fiber Bragg grating; temperature sensing; femtosecond laser fabrication; fiber taper
资金
- National Natural Science Foundation of China [61801030]
- Young Elite Scientists Sponsorship Program by the China Association for Science and Technology [2018QNRC001]
- 111 Project [D17021]
- Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions [IDHT20170510]
- Science and Technology Project of the Beijing Education Commission [KM201811232008]
A dual parameter optical fiber sensor for temperature and pressure discrimination has been proposed and experimentally realized. A tapered fiber Bragg grating (tapered-FBG) and an extrinsic Fabry-Perot interferometer with a ball shape (ball-EFPI) are the two main sensing structures. The taper is fabricated by elongating it during an arc-discharge provided by the fusion splicer. Then, the femtosecond laser is used to inscribe a first-order Bragg grating in the taper region, adopting the point-by-point direct-writing technique. The ball-EFPI is fabricated using the chemical etching and arc-discharge enlargement method. The test temperature range is 40 degrees-400 degrees, and the test pressure range is 0-2 MPa on the basis of ambient pressure. Experimental results show that the tapered-FBG has good temperature response while the ball-EFPI is sensitive to pressure. By analyzing the sensitivity matrix, the temperature and pressure discrimination can be achieved using the proposed hybrid sensor.
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