Theoretical Analysis of a New Intrinsic Fabry-Perot Interferometric Fiber Pressure Sensor Structure

2013 ◽  
Vol 331 ◽  
pp. 303-306
Author(s):  
Ning Wang ◽  
Jian Bo Fu ◽  
Xiao Xia Li
Keyword(s):  
Pressure Sensor ◽  
Fiber Diameter ◽  
High Sensitivity ◽  
Single Mode ◽  
Pressure Sensitivity ◽  
Response Curves ◽  
Multimode Fibers ◽  
Sensor Structure ◽  
Fabry Perot ◽  
Different Diameters

The theoretical model is got for a new intrinsic Fabry-Perot interferometric fiber pressure sensor structure fabricated by single mode and multimode fibers with different diameters. The pressure response curves are simulated by Matlab software. The analysis results showed that the pressure sensitivity decreased with the diameter of multimode fiber increased at some area, but the sensitivity begins to increase when the diameter value is more than critical point. The high sensitivity can be still got by increasing fiber diameter.

Compare of Two Intrinsic Fabry-Perot Interferometric Fiber Pressure Sensor Structures

2013 ◽  
Vol 336-338 ◽  
pp. 269-272
Author(s):  
Ning Wang ◽  
Xiao Xia Li
Keyword(s):  
Pressure Sensor ◽  
Size Structure ◽  
Pressure Sensors ◽  
Single Mode ◽  
Theoretical Models ◽  
Response Curves ◽  
Multimode Fibers ◽  
Fabry Perot ◽  
Different Diameters ◽  
Higher Sensitivity

The pressure responding theoretical models are got for two intrinsic Fabry-Perot interferometric fiber pressure sensors fabricated by single mode and multimode fibers with different diameters. The pressure response curves are simulated by Matlab programs. The analysis showed that the sensitivity changing situation is different for two structures. The big size structure has a critical point of sensitivity. Higher sensitivity can be got by two structures, but the small size structure is more attractive than the big size structure.

scholarly journals Opto-Microfluidic Fabry-Perot Sensor with Extended Air Cavity and Enhanced Pressure Sensitivity

Micromachines ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 19
Author(s):  
Pengfei Zhang ◽  
Chao Wang ◽  
Liuwei Wan ◽  
Qianqian Zhang ◽  
Zidan Gong ◽  
...  
Keyword(s):  
Static Pressure ◽  
Liquid Surface ◽  
Microfluidic Channel ◽  
Single Mode ◽  
Pressure Sensitivity ◽  
Air Cavity ◽  
Surface Reflection ◽  
Sensor Structure ◽  
Fabry Perot ◽  
Silica Capillary

An opto-microfluidic static pressure sensor based on a fiber Fabry-Perot Interferometer (FPI) with extended air cavity for enhancing the measuring sensitivity is proposed. The FPI is constructed in a microfluidic channel by the combination of the fixed fiber-end reflection and floating liquid surface reflection faces. A change of the aquatic pressure will cause a drift of the liquid surface and the pressure can be measured by detecting the shift of the FPI spectrum. Sensitivity of the sensor structure can be enhanced significantly by extending the air region of the FPI. The structure is manufactured by using a common single-mode optical fiber, and a silica capillary with the inner wall coated with a hydrophobic film. A sample with 3500 μm air cavity length has demonstrated the pressure sensitivity of about 32.4 μm/kPa, and the temperature cross-sensitivity of about 0.33 kPa/K.

scholarly journals A High Precision Fiber Optic Fabry–Perot Pressure Sensor Based on AB Epoxy Adhesive Film

Photonics ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 581
Author(s):  
Yanan Zhang ◽  
Shubin Zhang ◽  
Haitao Gao ◽  
Danping Xu ◽  
Zhuozhen Gao ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
High Sensitivity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Epoxy Adhesive ◽  
Curing Time ◽  
Adhesive Film ◽  
Interference Spectrum ◽  
Fabry Perot ◽  
Potential Applications

This paper proposes a Fabry–Perot pressure sensor based on AB epoxy adhesive with ultra-high sensitivity under low pressure. Fabry–Perot interference, located between single-mode fiber (SMF) and hollow-core fiber (HCF), is an ultra-thin AB epoxy film formed by capillary action. Then the thick HCF was used to fix the HCF and SMF at both ends with AB epoxy adhesive. Experimental results show that when the thickness of AB epoxy film is 8.74 μm, and the cavity length is 30 μm, the sensor has the highest sensitivity. The sensitivity is 257.79 nm/MPa within the pressure range of 0–70 kPa. It also investigated the influence of the curing time of AB epoxy on the interference spectrum. Experiments showed that the interference spectrum peak is blue-shifted with the increase of curing time. Our study also demonstrated the humidity stability of this pressure sensor. These characteristics mean that our sensor has potential applications in the biomedical field and ocean exploration.

scholarly journals High Sensitivity Fiber Gas Pressure Sensor with Two Separated Fabry–Pérot Interferometers Based on the Vernier Effect

Photonics ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 31
Author(s):  
Xiaokang Song ◽  
Liangtao Hou ◽  
Xiangyu Wei ◽  
Hang Su ◽  
Chang Li ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Single Mode ◽  
Gas Pressure ◽  
Pressure Sensing ◽  
Fabry Perot ◽  
Inner Diameter ◽  
Vernier Effect ◽  
Micro Cavity

A high sensitivity optical fiber gas pressure sensor based on paralleled Fabry–Pérot interferometers (FPIs) was demonstrated. One micro-cavity FPI is used as a reference FPI (FPI-1) to generate a Vernier effect and the other FPI (FPI-2) is used as a sensing tip. Both FPIs are connected by a 3-dB coupler to form a paralleled structure. The FPI-1 was fabricated by fusion splicing a piece of hollow core fiber (HCF) between two sections of single-mode fibers (SMF), whereas FPI-2 was formed by fusion splicing a section of HCF between SMF and a piece of HCF with a slightly smaller inner diameter for sensing pressure. The gas pressure sensitivity was amplified from 4 nm/MPa of single FPI to 45.76 nm/MPa of paralleled FPIs with an amplification factor of 11.44 and a linearity of 99.9%. Compared with the traditional fiber gas pressure sensors, the proposed sensor showed great advantages in sensitivity, mechanical strength, cost, and temperature influence resistant, which has potential in adverse-circumstance gas pressure sensing.

scholarly journals A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

Sensors ◽  
2017 ◽  
Vol 17 (3) ◽  
pp. 555 ◽  
Author(s):  
Lu Yan ◽  
Zhiguo Gui ◽  
Guanjun Wang ◽  
Yongquan An ◽  
Jinyu Gu ◽  
...  
Keyword(s):  
Low Cost ◽  
Strain Sensor ◽  
Glass Tube ◽  
High Sensitivity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fabry Perot ◽  
Micro Bubble ◽  
Bubble Structure ◽  
Cost Characteristics

A high-sensitivity, low-cost, ultrathin, hollow fiber micro bubble structure was proposed; such a bubble can be used to develop a high-sensitivity strain sensor based on a Fabry–Perot interferometer (FPI). The micro bubble is fabricated at the fiber tip by splicing a glass tube to a single mode fiber (SMF) and then the glass tube is filled with gas in order to expand and form a micro bubble. The sensitivity of the strain sensor with a cavity length of about 155 μm and a bubble wall thickness of about 6 μm was measured to be up to 8.14 pm/μϵ.

High-sensitivity intrinsic fiber-optic Fabry–Perot pressure sensor

1996 ◽  
Vol 21 (8) ◽  
pp. 615 ◽  
Author(s):  
T. W. Kao ◽  
H. F. Taylor
Keyword(s):  
Pressure Sensor ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Fabry Perot

High-sensitivity Fabry–Perot interferometric pressure sensor based on a nanothick silver diaphragm

2012 ◽  
Vol 37 (2) ◽  
pp. 133 ◽  
Author(s):  
Feng Xu ◽  
Dongxu Ren ◽  
Xiaolong Shi ◽  
Can Li ◽  
Weiwei Lu ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
High Sensitivity ◽  
Fabry Perot
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