期刊
IEEE SENSORS JOURNAL
卷 14, 期 4, 页码 1179-1184出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2013.2294012
关键词
Fiber sensors; modal interferometer; thin-core fiber; temperature
资金
- Science and Technology Development Fund, Macao SAR, China [082/2012/A3]
- National Natural Science Foundation of China [61007051]
- Qianjiang Talent Program of Zhejiang Province [QJD1302016]
An ultrasensitive temperature sensor based on a thin-core fiber modal interferometer (TCFMI) is proposed and demonstrated in this paper. After its middle is etched to a thin residual diameter, the TCFMI is sealed in a capillary tube filled with refractive index (RI) liquid. The thermo-optic effect of RI liquid turns the TCFMI into an ultrasensitive temperature sensor with sensitivity up to -22.23 nm/degrees C at 3.2 degrees C. The sensitivity is over 1000-fold that of the bare TCFMI in air. This proposed temperature sensor is also simple, cost-effective, and suitable for a variety of applications.
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