Highly sensitive salinity and temperature measurement based on tapered-SHF MZI fiber laser structure

Zhao, Fang1; Lin, Weihao1,2; Hu, Jie1; Liu, Shuaiqi1,2; Yu, Feihong1; Chen, Xingwei1; Wang, Guoqing3; Shum, Perry Ping1; Shao, Liyang1,4

2023-06-01

10.1088/1361-6501/acbe12

MEASUREMENT SCIENCE and TECHNOLOGY   Impact Factor & Quartile

0957-0233

1361-6501

A novel Mach-Zehnder interferometer (MZI) based on tapered-side-hole-fiber (SHF) fiber laser structure, which has obvious advantages in salinity and temperature measurement sensitivity, is analyzed both theoretically and experimentally. The tapered-SHF structure is used as a sensing element and an optical filter, which is connected to the erbium-doped fiber to form a fiber ring laser (FRL). Based on the linear correspondence between the output spectra of the FRL and the salinities, the salinity around the sensing area is measured by the MZI. The FRL has the unique advantages of high resolution, narrow line width, high optical signal-to-noise ratio, and high stability. Compared with the transmission spectrum of conical SHF in the broadband light source, these advantages are more suitable for sensing applications. The experimental results show that the finer the taper diameter, the higher the sensitivity of salinity and temperature. When the taper diameter is 8.23 mu m, the salinity sensitivity of the sensor can reach 0.3347 nm/parts per thousand, and the temperature sensitivity can reach -0.4270 nm degrees C-1.

fiber ring laser sensor salinity sensor seawater salinity MZI

SCI

English

First ; Corresponding

Department of Natural Resources of Guangdong Province[2021A0505080002] ; Guangdong Science and Technology Department[PCL2021A14-B1] ; null[22]

Engineering ; Instruments & Instrumentation

Engineering, Multidisciplinary ; Instruments & Instrumentation

WOS:000946769400001

IOP Publishing Ltd

2-s2.0-85150386058

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518005, Peoples R China
2.Univ Macau, State Key Lab Analog & Mixed Signal VLSI, Macau 999078, Peoples R China
3.Shenzhen Inst Informat Technol, Sch Microelect, Shenzhen 518172, Peoples R China
4.Peng Cheng Lab, Shenzhen 518005, Peoples R China

Zhao, Fang,Lin, Weihao,Hu, Jie,et al. Highly sensitive salinity and temperature measurement based on tapered-SHF MZI fiber laser structure[J]. MEASUREMENT SCIENCE and TECHNOLOGY,2023,34(6).

Zhao, Fang.,Lin, Weihao.,Hu, Jie.,Liu, Shuaiqi.,Yu, Feihong.,...&Shao, Liyang.(2023).Highly sensitive salinity and temperature measurement based on tapered-SHF MZI fiber laser structure.MEASUREMENT SCIENCE and TECHNOLOGY,34(6).

Zhao, Fang,et al."Highly sensitive salinity and temperature measurement based on tapered-SHF MZI fiber laser structure".MEASUREMENT SCIENCE and TECHNOLOGY 34.6(2023).