Demodulation of Temperature and Salinity with Variable Sensitivity Matrix Based on Developed Refractive Index of Seawater in Infrared Band

Two-parameter demodulation based on variable sensitivity matrix (VSM) for temperature and salinity measurement in seawater is proposed based on the developed refractive index (RI) expression of seawater in infrared band of 1200nm - 1650nm. The RI expression of n ( S , T , λ) is obtained from a great...

Full description

Saved in:
Bibliographic Details
Published in:IEEE sensors journal 2023-08, Vol.23 (16), p.1-1
Main Authors: Zhuang, Fu-Na, Wang, Jing, Yang, Hong-Juan, Liang, Hong-Lin, Luo, Yun-Wen, Wang, Shan-Shan
Format: Article
Language:English
Subjects:
Demodulation
Infrared spectra
Mach-Zehnder interferometers
Microfibers
Optical fiber sensors
Optical fibers
Parameter sensitivity
refractive index of seawater
Refractivity
Salinity
Salinity (geophysical)
Sea measurements
Seawater
Sensitivity
sensitivity matrix
Sensors
Temperature
Temperature measurement
Temperature sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two-parameter demodulation based on variable sensitivity matrix (VSM) for temperature and salinity measurement in seawater is proposed based on the developed refractive index (RI) expression of seawater in infrared band of 1200nm - 1650nm. The RI expression of n ( S , T , λ) is obtained from a great deal of RI data measured by microfiber Mach-Zehnder interferometer and fitted by different methods. The accuracy of the developed n ( S , T , λ) is verified experimentally, and demodulation error of about 2.5% is reached by VSM method, which is at least twice lower than traditional sensitivity matrix used. The VSM and RI expression proposed here will be useful for theoretical or experimental research on optical fiber sensors operated in infrared band and they can also be expanded to other sensors based on RI change of seawater.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2023.3291722