期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 31, 期 7, 页码 553-556出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2019.2901720
关键词
Fiber temperature sensor; rGO; interferometer
资金
- National Natural Science Foundation of China (NSFC) [61675054, 91750107, 61875044]
- Natural Science Foundation of Heilongjiang Province in China [ZD2018015]
- 111 Project of Harbin Engineering University [B13015]
- Fundamental Research Funds for the Harbin Engineering University of China [HEUCFG201715, HEUCF181117, HEUCFM181104]
A compact temperature sensor based on a Mach-Zehnder interferometer (MZI) is demonstrated in a suspended core hollow fiber (SCHF) covered with reduced graphene oxide (rGO). The MZI is constructed by connecting two single-mode fibers with an intermediate section SCHF in offset splicing, which introduces the interference between the fundamental and high-order modes of the suspended core. The SCHF-based MZI without rGO is insensitive to the temperature; however, after employing rGO into the SCHF, the temperature sensitivity of similar to 179.4 pm/degrees C in the range of 30 degrees C-80 degrees C is obtained experimentally. Compared to microfiber-based sensors, the annular cladding can prevent the sensor from external environmental pollution. The proposed rGO-based all-fiber temperature sensor has good mechanical strength and is well compatible with fiber-optic systems, which makes it a good candidate for temperature monitoring. Meanwhile, the air hole of the SCHF is convenient for forming microfluidic channel to realize gas concentration or humidity sensing.
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