期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 39, 期 12, 页码 4225-4229出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2020.3013929
关键词
Zinc oxide; II-VI semiconductor materials; Optical fiber sensors; Reflection; Optical fibers; Optical interferometry; Fabry-Perot interferometer; optical fiber sensor; UV sensor; ZnO microwire
资金
- National Natural Science Foundation of China (NSFC) [61675137, 91860138]
- China Postdoctoral Science Foundation [2018M643162]
- Natural Science Foundation ofGuangdong Province [2017A030310033]
- Science and Technology Innovation Commission of Shenzhen [JCYJ20170818093743767, JCYJ20180507183904841]
- Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things
The proposed simple deep UV sensor consists of a conventional single-mode optical fiber and a ZnO microwire, with the microwire acting as a Fabry-Perot interferometer for UV light monitoring. The interference wavelengths of the device exhibit red-shift under 266-nm deep UV laser irradiation, with a sensitivity of 0.288 nm/(W center dot cm(-2)) and a fast response time of 0.56 ms, showing promise for highly spatial-resolved optical fiber UV sensors.
We propose a simple deep ultraviolet (UV) sensor consisting of a conventional single-mode optical fiber capped with a ZnO microwire. The ZnO microwire positioned on the fiber-tip acts as a Fabry-Perot interferometer, of which the reflection spectrum can be employed for UV light monitoring. When ZnO microwire is exposed to UV irradiation, variations in the concentration of photogenerated carriers will result in the change of the refractive index (RI) of the ZnO microwire, and thus interference wavelengths of the proposed device exhibits red-shift with a sensitivity of 0.288 nm/(W center dot cm(-2)) under 266-nm deep UV laser irradiation. Meanwhile, a fast response time of 0.56 ms is experimentally obtained. The results may pave a new way for fast responsive, highly spatial-resolved optical fiber UV sensors.
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