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

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.

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Highly sensitive temperature measurement based on polymer-coated single-mode, multimode, single-mode, fiber structure

10.1117/12.2000438 ◽

2012 ◽

Author(s):

Linlin Xue ◽

Yujuan Zhang ◽

Di Che ◽

Qijin Zhang ◽

Li Yang

Keyword(s):

Temperature Measurement ◽

Single Mode ◽

Single Mode Fiber ◽

Fiber Structure ◽

Highly Sensitive

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Measurable refractive index range for a doubly cladding single mode fiber sensor and its application in temperature and humidity sensing

10.1117/12.870121 ◽

2010 ◽

Cited By ~ 1

Author(s):

Xiao-Kang Zhang ◽

Lu Lan ◽

Zhen Kong ◽

Lihua Chen ◽

Zhiren Ye

Keyword(s):

Refractive Index ◽

Single Mode ◽

Single Mode Fiber ◽

Fiber Sensor ◽

Humidity Sensing ◽

Temperature And Humidity

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2D materials coated on etched optical fibers as humidity sensor

Scientific Reports ◽

10.1038/s41598-020-79563-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Erfan Owji ◽

Hossein Mokhtari ◽

Fatemeh Ostovari ◽

Behnam Darazereshki ◽

Nazanin Shakiba

Keyword(s):

Graphene Oxide ◽

Optical Fibers ◽

Humidity Sensor ◽

2D Materials ◽

Optical Loss ◽

Single Mode ◽

Single Mode Fiber ◽

Test Set ◽

Humidity Sensing ◽

Molybdenum Diselenide

AbstractIn this investigation, etched-fibers are coated by 2D layers such as Molybdenum disulfide (MoS2), Molybdenum diselenide (MoSe2) and composition of graphene and graphene oxide (G/GO) to modify humidity sensing. The relative differentiation of attenuations (RDA) in presence of relative humidity (RH) is measured by Optical Loss Test Set at two standard-wavelengths-telecommunication (1310 nm and 1550 nm). Results show that the etched single-mode fiber (ESMF) coated with G/GO has relatively high and one by one function for RDA versus RH (more than 30%). Also, its sensitivity and variance are reasonable. The MoSe2 based sensor is applicable at humidity below 30% because of higher RDA. However, it is not useful at humidity more than 30% due to the absence of one by one function for RDA versus RH. Besides, ESMF coated with MoS2 has indistinctive behavior and is not useful as a humidity sensor.

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Compact omnidirectional multicore fiber-based vector bending sensor

Scientific Reports ◽

10.1038/s41598-021-85507-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Josu Amorebieta ◽

Angel Ortega-Gomez ◽

Gaizka Durana ◽

Rubén Fernández ◽

Enrique Antonio-Lopez ◽

...

Keyword(s):

Single Mode ◽

High Accuracy ◽

Single Mode Fiber ◽

Wavelength Shift ◽

Short Segment ◽

Light Power ◽

Highly Sensitive ◽

Bending Sensor ◽

Asymmetric Multicore ◽

Multicore Fiber

AbstractWe propose and demonstrate a compact and simple vector bending sensor capable of distinguishing any direction and amplitude with high accuracy. The sensor consists of a short segment of asymmetric multicore fiber (MCF) fusion spliced to a standard single mode fiber. The reflection spectrum of such a structure shifts and shrinks in specific manners depending on the direction in which the MCF is bent. By monitoring simultaneously wavelength shift and light power variations, the amplitude and bend direction of the MCF can be unmistakably measured in any orientation, from 0° to 360°. The bending sensor proposed here is highly sensitive even for small bending angles (below 1°).

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