scholarly journals Investigation of Composite Structure with Dual Fabry–Perot Cavities for Temperature and Pressure Sensing

Photonics ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 138
Author(s):  
Jun Wang ◽  
Long Li ◽  
Shuaicheng Liu ◽  
Diyang Wu ◽  
Wei Wang ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Cavity Length ◽  
Applied Pressure ◽  
Fiber Sensors ◽  
Pressure Sensing ◽  
Fabrication Cost ◽  
Sensing Applications ◽  
Fabry Perot ◽  
Temperature And Pressure ◽  
Transfer Method

To deeply analyze the influence of diaphragm materials on the temperature and pressure sensitivity of Fabry–Perot interferometer-based dual-parameter fiber sensors, the multiple transfer method was used to fabricate the dual Fabry–Perot cavities, respectively, consisting of the following combinations: epoxy resin AB/polydimethylsiloxane (PDMS), Ecoflex0030 silicone rubber /PDMS, and PDMS/Ecoflex0030 silicone rubber. Experimental results show that the temperature sensitivities are, respectively, 528, 540, and 1033 pm/°C in the range of 40–100 °C. Within the applied pressure range of 100–400 kPa, the pressure sensitivities are, respectively, 16.0, 34.6, and 30.2 pm/kPa. The proposed sensors have advantages of proper sensitivity, simple fabrication, cost-effectiveness, controllable cavity length, and suitability for practical sensing applications.

scholarly journals Electromechanical Properties of PVDF-Based Polymers Reinforced with Nanocarbonaceous Fillers for Pressure Sensing Applications

2019 ◽  
Author(s):  
Javier Teixido ◽  
Pedro Costa ◽  
Senentxu Lanceros-Mendez ◽  
Jose Manuel Abete ◽  
Aitzol Iturrospe Iregui
Keyword(s):  
Percolation Threshold ◽  
Vinylidene Fluoride ◽  
Applied Pressure ◽  
The Other ◽  
Ductile Material ◽  
Maximum Strain ◽  
Pressure Sensing ◽  
Sensing Applications ◽  
Other Hand ◽  
Poly Vinylidene Fluoride

Polymer-based composites reinforced with nanocarbonaceous materials can be tailored for functional applications. Poly(vinylidene fluoride) (PVDF) reinforced with carbon nanotubes (CNT) or graphene with different filler contents have been developed as potential piezoresistive materials. The mechanical properties of the nanocomposites depend of the PVDF matrix, filler type and filler content. PVDF 6010 is a relatively more ductile material, whereas PVDF-HFP shows larger maximum strain near 300% strain for composites with CNT, 10 times higher than the pristine polymer. This behaviour is similar for all composites reinforced with CNT. On the other hand, rGO/PVDF composites decrease the maximum strain compared to neat PVDF. It is shown that the use of different PVDF copolymers does not influence the electrical properties of the composites. On the other hand, CNT as filler leads to composites with percolation threshold around 0.5 wt.%, whereas reduced graphene oxide (rGO) nanocomposites shows percolation threshold at ≈2 wt.%. Both nanocomposites present excellent linearity between applied pressure and resistance variation, with pressure sensibility (PS) decreasing with applied pressure, from PS≈ 1.1 to 0.2 MPa-1. A proof of concept demonstration is presented, showing the suitability of the materials for industrial pressure sensing applications.

Design and Analysis of Micro-Opto-Mechanical System Cantilever Integrated with Photonics Waveguide for Pressure Sensing Applications

2020 ◽  
Vol 18 (1) ◽  
pp. 18-25
Author(s):  
Veer Chandra ◽  
Rakesh Ranjan
Keyword(s):  
Light Intensity ◽  
Mechanical System ◽  
Pressure Sensor ◽  
Applied Pressure ◽  
Waveguide Structure ◽  
Slot Waveguide ◽  
Pressure Sensing ◽  
Sensing Applications ◽  
The Relationship ◽  
Slot Waveguides

In this work, the pressure sensing approach based on the Micro-Opto-Mechanical System (MOMS) cantilever integrated with waveguide structure has been explored. The MOMS based photonic sensors are drawing attention because of their high sensing capabilities. In the design of MOMS based cantilever pressure sensor, mainly two different waveguide structures, Rib and Slot waveguides have been considered. The deviation in light intensity at the output of the waveguide structure is mainly used to analyze the amount of exerted pressure at the free-end of cantilever. Using the different waveguide parameters such as, effective mode area, light intensity variations, etc., the performance comparison between Rib and Slot waveguides have been done. The relationship between the normalized light intensity at the waveguide output corresponding to the applied pressure has been established from the relationship between the deflection versus pressure and normalized intensity versus deflection. It has been anticipated that the performance of pressure sensor using Slot waveguide is significantly better than the Rib waveguide for some application.

scholarly journals A Miniature Fabry–Pérot Fiber Interference Sensor Based on Polyvinyl Chloride Membrane for Acoustic Pressure Sensing in Mid–High-Frequency Band

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7605
Author(s):  
Qingkai Yao ◽  
Xing Guo ◽  
Linfang Xie ◽  
Li Sun ◽  
Fapeng Yu ◽  
...  
Keyword(s):  
Polyvinyl Chloride ◽  
High Frequency ◽  
Acoustic Pressure ◽  
Pressure Sensing ◽  
First Order ◽  
Sensing Applications ◽  
Fabry Perot ◽  
Inner Diameter ◽  
Polyvinyl Chloride Membrane ◽  
Sensitive Pressure

In this paper, a Fabry–Pérot interference fiber sensor was fabricated by using a Polyvinyl chloride membrane (20 μm in thickness) attached at the end of a ferrule with an inner diameter of 1.1 mm. In consideration of the vibration response of the membrane, the feature of the first-order natural frequency of membrane was analyzed by COMSOL Multiphysics. The acoustic sensing performance of the Fabry–Pérot fiber interference sensor was studied in air. The results reveal that the sensor possessed good acoustic pressure sensitivity, in the order of 33.26 mV/Pa. In addition, the noise-limited minimum detectable pressure level was determined to be 58.9 μPa/Hz1/2 and the pressure-induced deflection obtained was 105 nm/Pa at the frequency of 1 kHz. The response of the sensor was approximately consistent with the reference sensor from 1 to 7 kHz. All these results support that the fabricated Fabry–Pérot fiber interference sensor may be applied for ultra-sensitive pressure sensing applications.

scholarly journals Low-Finesse Fabry–Pérot Interferometers Applied in the Study of the Relation between the Optical Path Difference and Poles Location

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 453 ◽  
Author(s):  
José Trinidad Guillen Bonilla ◽  
Héctor Guillen Bonilla ◽  
Verónica María Rodríguez Betancourtt ◽  
María Eugenia Sánchez Morales ◽  
Juan Reyes Gómez ◽  
...  
Keyword(s):  
System Analysis ◽  
Cavity Length ◽  
Optical Path Difference ◽  
Path Difference ◽  
Optical Path ◽  
Fiber Sensors ◽  
Fabry Perot ◽  
The Laplace Transform ◽  
Frequency Components ◽  
The Fourier Transform

Interferometry sensors are frequently analyzed by applying the Fourier transform because the transformation separates all frequency components of its signal, making its study on a complex plane feasible. In this work, we study the relation between the optical path difference (OPD) and poles location theoretically and experimentally, using the Laplace transform and a pole-zero map. Theory and experiments are in concordance. For our study, only the cosine function was considered, which is filtered from the interference pattern. In experimental work, two unperturbed low-finesse Fabry–Pérot interferometers were used. First, a Fabry–Pérot interferometer that has a cavity length of ~ 1.6 mm was used. Its optical path difference was 2.33 mm and the poles were localized at points ± i 12 . rad/nm. Secondly, a Fabry–Pérot interferometer with a cavity length of ~ 5.2 mm was used, and its optical path difference was 7.59 mm and the poles were localized at points ± i 40.4 rad/nm. Experimental results confirmed the theoretical analysis. Our proposal finds practical application for interferometer analysis, signal processing of optical fiber sensors, communication system analysis, and multiplexing systems based on interferometers.

scholarly journals Electromechanical Properties of PVDF-Based Polymers Reinforced with Nanocarbonaceous Fillers for Pressure Sensing Applications

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3545 ◽  
Author(s):  
Javier Vicente ◽  
P. Costa ◽  
S. Lanceros-Mendez ◽  
Jose Manuel Abete ◽  
Aitzol Iturrospe
Keyword(s):  
Percolation Threshold ◽  
Vinylidene Fluoride ◽  
Applied Pressure ◽  
The Other ◽  
Ductile Material ◽  
Maximum Strain ◽  
Pressure Sensing ◽  
Sensing Applications ◽  
Other Hand ◽  
Poly Vinylidene Fluoride

Polymer-based composites reinforced with nanocarbonaceous materials can be tailored for functional applications. Poly(vinylidene fluoride) (PVDF) reinforced with carbon nanotubes (CNT) or graphene with different filler contents have been developed as potential piezoresistive materials. The mechanical properties of the nanocomposites depend on the PVDF matrix, filler type, and filler content. PVDF 6010 is a relatively more ductile material, whereas PVDF-HFP (hexafluropropylene) shows larger maximum strain near 300% strain for composites with CNT, 10 times higher than the pristine polymer. This behavior is similar for all composites reinforced with CNT. On the other hand, reduced graphene oxide (rGO)/PVDF composites decrease the maximum strain compared to neat PVDF. It is shown that the use of different PVDF copolymers does not influence the electrical properties of the composites. On the other hand, CNT as filler leads to composites with percolation threshold around 0.5 wt.%, whereas rGO nanocomposites show percolation threshold at ≈ 2 wt.%. Both nanocomposites present excellent linearity between applied pressure and resistance variation, with pressure sensibility (PS) decreasing with applied pressure, from PS ≈ 1.1 to 0.2 MPa−1. A proof of concept demonstration is presented, showing the suitability of the materials for industrial pressure sensing applications.

CMOS-MEMS Based Current Mirror MOSFET Embedded Pressure Sensor for Healthcare and Biomedical Applications

2013 ◽  
Vol 647 ◽  
pp. 315-320 ◽  
Author(s):  
Pradeep Kumar Rathore ◽  
Brishbhan Singh Panwar
Keyword(s):  
Pressure Sensor ◽  
Biomedical Applications ◽  
Circuit Simulation ◽  
Applied Pressure ◽  
Pressure Sensors ◽  
Cmos Technology ◽  
Current Mirror ◽  
Sensing Element ◽  
Pressure Sensing ◽  
Cmos Mems

This paper reports on the design and optimization of current mirror MOSFET embedded pressure sensor. A current mirror circuit with an output current of 1 mA integrated with a pressure sensing n-channel MOSFET has been designed using standard 5 µm CMOS technology. The channel region of the pressure sensing MOSFET forms the flexible diaphragm as well as the strain sensing element. The piezoresistive effect in MOSFET has been exploited for the calculation of strain induced carrier mobility variation. The output transistor of the current mirror forms the active pressure sensing MOSFET which produces a change in its drain current as a result of altered channel mobility under externally applied pressure. COMSOL Multiphysics is utilized for the simulation of pressure sensing structure and Tspice is employed to evaluate the characteristics of the current mirror pressure sensing circuit. Simulation results show that the pressure sensor has a sensitivity of 10.01 mV/MPa. The sensing structure has been optimized through simulation for enhancing the sensor sensitivity to 276.65 mV/MPa. These CMOS-MEMS based pressure sensors integrated with signal processing circuitry on the same chip can be used for healthcare and biomedical applications.

Optimization of Single-/Multi-/Single-Mode Intrinsic Fabry–Perot Fiber Sensors

2012 ◽  
Vol 30 (14) ◽  
pp. 2281-2288 ◽  
Author(s):  
Cheng Ma ◽  
Bo Dong ◽  
E. M. Lally ◽  
Anbo Wang
Keyword(s):  
Single Mode ◽  
Fiber Sensors ◽  
Fabry Perot

Range Tunable Optical Fiber Micro-Fabry–Pérot Interferometer for Pressure Sensing

2016 ◽  
Vol 28 (4) ◽  
pp. 402-405 ◽  
Author(s):  
Honglin Liu ◽  
D. N. Wang ◽  
Jibing Liu ◽  
Shen Liu
Keyword(s):  
Optical Fiber ◽  
Pressure Sensing ◽  
Fabry Perot

scholarly journals Adhesive-Free Bonding of Monolithic Sapphire for Pressure Sensing in Extreme Environments

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2712 ◽  
Author(s):  
Jihaeng Yi
Keyword(s):  
Room Temperature ◽  
Extreme Environments ◽  
Optical Signal ◽  
Harsh Environments ◽  
Free Space Optics ◽  
Pressure Sensing ◽  
Space Optics ◽  
Fabry Perot ◽  
Deflection Theory

This paper presents a monolithic sapphire pressure sensor that is constructed from two commercially available sapphire wafers through a combination of reactive-ion etching and wafer bonding. A Fabry–Perot (FP) cavity is sealed fully between the adhesive-free bonded sapphire wafers and thus acts as a pressure transducer. A combination of standard silica fiber, bonded sapphire wafers and free-space optics is proposed to couple the optical signal to the FP cavity of the sensor. The pressure in the FP cavity is measured by applying both white-light interferometry and diaphragm deflection theory over a range of 0.03 to 3.45 MPa at room temperature. With an all-sapphire configuration, the adhesive-free bonded sapphire sensor is expected to be suitable for in-situ pressure measurements in extreme harsh environments.

Sign in / Sign up

Export Citation Format

Share Document