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- Title
Adaptive Fiber-Ring Lasers Based on Isopropanol Filled Microfiber Coupler for High-Sensitivity Temperature Sensing.
- Authors
Lin, Weihao; Hu, Jie; Zhao, Fang; Sun, Siming; Liu, Yuhui; Liu, Shuaiqi; Yu, Feihong; Mak, Peng-Un; Pun, Sio-Hang; Shum, Perry-Ping; Vai, Mang-I; Shao, Liyang
- Abstract
We demonstrated a new method for temperature measurement inside a fiber ring laser (FRL) cavity. Different from traditional FRL temperature sensing system which need additional filter working as a sensor, a micro-fiber coupler (MFC) was designed as a beam splitter, filter, and temperature sensor. In addition, isopropanol, a liquid with very high photothermal coefficient, is selectively filled in the MFC in order to improve the sensitivity of the system on temperature. In the dynamic range of 20–40 °C, we obtained a good temperature sensitivity of −1.29 nm/°C, with linear fitting up to 0.998. Benefiting from the advantages of laser sensing, the acquired laser has a 3 – dB bandwidth of less than 0.2 nm and a signal-to-noise ratio (SNR) of up to 40 dB. The proposed sensor has a low cost and high sensitivity, which is expected to be used in biomedical health detection, real-time monitoring of ocean temperature, and other application scenarios.
- Subjects
RING lasers; BEAM splitters; LASERS; MICROFIBERS; OCEAN temperature; ISOPROPYL alcohol; TEMPERATURE measurements; FIBER lasers
- Publication
Micromachines, 2022, Vol 13, Issue 10, p1697
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi13101697