Adaptive Fiber-Ring Lasers Based on Isopropanol Filled Microfiber Coupler for High-Sensitivity Temperature Sensing

Lin，Weihao1,2,3; Hu，Jie2; Zhao，Fang2; Sun，Siming2; Liu，Yuhui2; Liu，Shuaiqi1,2,3; Yu，Feihong2; Mak，Peng Un3; Pun，Sio Hang1; Shum，Perry Ping2; Vai，Mang I.1,3; Shao，Liyang2,4

2022-10-01

10.3390/mi13101697

Micromachines   Impact Factor & Quartile

2072-666X

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.

fiber ring laser micro-fiber coupler temperature measurement

SCI

English

Corresponding

Chemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics

Chemistry, Analytical ; Nanoscience & Nanotechnology ; Instruments & Instrumentation ; Physics, Applied

WOS:000872832600001

MDPI

2-s2.0-85140887201

Scopus

1.State Key Laboratory of Analog and Mixed-Signal VLSI,University of Macau,999078,Macao
2.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Electrical and Computer Engineering,University of Macau,999078,Macao
4.Peng Cheng Laboratory,Shenzhen,518005,China

Lin，Weihao,Hu，Jie,Zhao，Fang,et al. Adaptive Fiber-Ring Lasers Based on Isopropanol Filled Microfiber Coupler for High-Sensitivity Temperature Sensing[J]. Micromachines,2022,13(10).

Lin，Weihao.,Hu，Jie.,Zhao，Fang.,Sun，Siming.,Liu，Yuhui.,...&Shao，Liyang.(2022).Adaptive Fiber-Ring Lasers Based on Isopropanol Filled Microfiber Coupler for High-Sensitivity Temperature Sensing.Micromachines,13(10).

Lin，Weihao,et al."Adaptive Fiber-Ring Lasers Based on Isopropanol Filled Microfiber Coupler for High-Sensitivity Temperature Sensing".Micromachines 13.10(2022).