scholarly journals Humidity sensor based on a single-mode hetero-core fiber structure

2011 ◽  
Vol 36 (10) ◽  
pp. 1752 ◽  
Author(s):  
Qiang Wu ◽  
Yuliya Semenova ◽  
Jinesh Mathew ◽  
Pengfei Wang ◽  
Gerald Farrell
Keyword(s):  
Humidity Sensor ◽  
Single Mode ◽  
Fiber Structure ◽  
Core Fiber

Magnetic Field Sensing Based on Magnetic-fluid-clad No-core Single-mode No-core Fiber Structure

2015 ◽  
Vol 44 (12) ◽  
pp. 1206002
Author(s):  
PU Sheng-li ◽  
TANG Jia-li ◽  
LIU Zhi-heng ◽  
LUO Long-feng
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
Single Mode ◽  
Fiber Structure ◽  
Core Fiber ◽  
Field Sensing ◽  
Magnetic Field Sensing

Michelson liquid-level sensor based on cascaded no-core fiber and single-mode fiber structure

Optik ◽  
2020 ◽  
Vol 206 ◽  
pp. 163746 ◽  
Author(s):  
Dejiu Feng ◽  
Min Liu ◽  
Wenlin Feng ◽  
Bangxing Li
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Liquid Level ◽  
Fiber Structure ◽  
Level Sensor ◽  
Core Fiber ◽  
Liquid Level Sensor

scholarly journals Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 521 ◽  
Author(s):  
Yuan ◽  
Qian ◽  
Liu ◽  
Wang ◽  
Yu
Keyword(s):  
Carbon Nanotube ◽  
Humidity Sensor ◽  
Single Mode ◽  
Small Region ◽  
Single Mode Fiber ◽  
Fiber Structure ◽  
Humidity Sensing ◽  
Highly Sensitive ◽  
Temperature And Humidity ◽  
Stable Performance

Here we report on a miniaturized optical interferometer in one fiber based on two mismatched nodes. The all-fiber structure shows stable performance of temperature and humidity sensing. For temperature sensing in large ranges, from 40 to 100 °C, the sensor has a sensitivity of 0.24 dB/°C, and the adjusted R-squared value of fitting result reaches 0.99461 which shows a reliable sensing result. With carbon nanotubes coating the surface of the fiber, the temperature sensitivity is enhanced from 0.24561 to 1.65282 dB/°C in a small region, and the performance of humidity sensing becomes more linear and applicable. The adjusted R-squared value of the linear fitting line for humidity sensing shows a dramatic increase from 0.71731 to 0.92278 after carbon nanotube coating, and the humidity sensitivity presents 0.02571 nm/%RH.

Novel optical fiber humidity sensor based on a no-core fiber structure

2013 ◽  
Vol 190 ◽  
pp. 1-5 ◽  
Author(s):  
Li Xia ◽  
Lecheng Li ◽  
Wei Li ◽  
Tian Kou ◽  
Deming Liu
Keyword(s):  
Optical Fiber ◽  
Humidity Sensor ◽  
Fiber Structure ◽  
Core Fiber

Fiber-optic Michelson interferometer based on α-Fe2O3/ZrO2 sensing membrane and its application in trace fluoride-ion detection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zizheng Yue ◽  
Wenlin Feng
Keyword(s):  
Silver Film ◽  
Fiber Optic ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Ion Detection ◽  
Core Fiber ◽  
Sensing Membrane

Abstract In this work, a fiber-optic fluoride-ion-detection Michelson interferometer based on the thin-core fiber (TCF) and no-core fiber (NCF) coated with α-Fe2O3/ZrO2 sensing film is proposed and presented. The single-mode fiber (SMF) is spliced with the TCF and NCF in turn, and a waist-enlarged taper is spliced between them. Then, a silver film is plated on the end face of NCF to enhance the reflection. After the absorption of fluoride ion by the sensing film, the effective refractive index (RI) of the coated cladding will change, which leads to the regular red shift of the interference dip with the increasing fluoride-ion concentration. Thus, the fluoride-ion concentrations can be determined according to the corresponding dip wavelength shifts. The results show that the sensor has an excellent linear response (R 2 = 0.995) with good sensitivity (8.970 nm/ppm) when the fluoride-ion concentration is in the range of 0–1.5 ppm. The response time is about 15 s. The sensor has the advantage of good selectivity, good temperature and pH stabilities, and can be applied to detect fluoride ion effectively.

An intensity modulated fiber-optic carbon monoxide sensor based on Ag/Co-MOF in-situ coated thin-core fiber

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Lian Wang ◽  
Juncheng Zhou ◽  
Yuhao Chen ◽  
Liu Xiao ◽  
Guojia Huang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Monoxide ◽  
Photoelectron Spectroscopy ◽  
Fiber Optic ◽  
Temperature Stability ◽  
Single Mode ◽  
X Ray ◽  
Intensity Modulated ◽  
Core Fiber

Abstract An intensity modulated fiber-optic carbon monoxide (CO) sensor by integrating in-situ solvothermal-growth Ag/Co-MOF sensing film is fabricated and evaluated. The Michelson interference sensing structure is composed of single-mode fiber (SMF), enlarged taper, thin-core fiber (TCF), and Ag film as the reflector. Ag/Co-MOF was coated on the cladding of the TCF as the sensing material, and the enlarged taper is located between TCF and SMF as the coupler. The structure, morphology, compositions and thermal stability of the Ag/Co-MOF sensing film were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), etc. The sensitivity of the sensor is 0.04515 dB/ppm, and the fitting parameter of the CO concentration is 0.99876. In addition, the sensor has the advantages of good selectivity, good signal and temperature stability, and it has potential application in trace CO detection.

Sign in / Sign up

Export Citation Format

Share Document