scholarly journals Sapphire derived fiber based Fabry-Perot interferometer with an etched micro air cavity for strain measurement at high temperatures

2019 ◽  
Vol 27 (19) ◽  
pp. 27112 ◽  
Author(s):  
Penghao Zhang ◽  
Li Zhang ◽  
Zhongyu Wang ◽  
Xinying Zhang ◽  
Zhendong Shang
Keyword(s):  
High Temperatures ◽  
Strain Measurement ◽  
Air Cavity ◽  
Fabry Perot

PCF-Based Fabry–Pérot Interferometric Sensor for Strain Measurement at High Temperatures

2011 ◽  
Vol 23 (11) ◽  
pp. 700-702 ◽  
Author(s):  
Ming Deng ◽  
Chang-Ping Tang ◽  
Tao Zhu ◽  
Yun-Jiang Rao
Keyword(s):  
High Temperatures ◽  
Strain Measurement ◽  
Fabry Perot ◽  
Interferometric Sensor

Microbubble based fiber-optic Fabry–Perot interferometer formed by fusion splicing single-mode fibers for strain measurement

2012 ◽  
Vol 51 (8) ◽  
pp. 1033 ◽  
Author(s):  
De-Wen Duan ◽  
Yun-jiang Rao ◽  
Yu-Song Hou ◽  
Tao Zhu
Keyword(s):  
Strain Measurement ◽  
Fiber Optic ◽  
Single Mode ◽  
Fabry Perot

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.

Static strain measurement with submicro strain resolution and large dynamic range using twin grating Fabry-Perot sensor

2001 ◽  
Author(s):  
Mikhail G. Shlyagin ◽  
Pieter L. Swart ◽  
Serguei V. Miridonov ◽  
Anatoli A. Chtcherbakov ◽  
Ileana Marquez Borbon ◽  
...  
Keyword(s):  
Strain Measurement ◽  
Dynamic Range ◽  
Large Dynamic Range ◽  
Static Strain ◽  
Fabry Perot

Absolute strain measurement using an in-fibre-Bragg-grating-based Fabry-Perot sensor

2000 ◽  
Vol 36 (8) ◽  
pp. 708 ◽  
Author(s):  
Y.J. Rao ◽  
M.R. Cooper ◽  
D.A. Jackson ◽  
C.N. Pannell ◽  
L. Reekie
Keyword(s):  
Strain Measurement ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Fabry Perot

scholarly journals Compliance-Derived Strain Determination in Fibre (Bundle) Tests at High Temperatures

1998 ◽  
Vol 7 (3) ◽  
pp. 096369359800700 ◽  
Author(s):  
R. Paar ◽  
P. Bonnel ◽  
M. Steen
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Strain Measurement ◽  
Fibre Bundle ◽  
Testing Machine ◽  
Tensile Tests ◽  
Gauge Length ◽  
Head Displacement ◽  
The Cross ◽  
Strain Determination

In high temperature fibre tensile tests direct strain measurement is not a straightforward task, due to the limited accessibility and the fragile nature of the specimen. A compliance method which allows to determine the true specimen strain within the gauge length from the cross head displacement of the testing machine is presented.

Optical Fiber-Tip Fabry–Pérot Interferometric Pressure Sensor Based on an In Situ μ-Printed Air Cavity

2018 ◽  
Vol 36 (17) ◽  
pp. 3618-3623 ◽  
Author(s):  
Jushuai Wu ◽  
Mian Yao ◽  
Feng Xiong ◽  
A. Ping Zhang ◽  
Hwa-Yaw Tam ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Pressure Sensor ◽  
Air Cavity ◽  
Fabry Perot

scholarly journals Optical Fiber Fabry–Pérot Interferometer Based on an Air Cavity for Gas Pressure Sensing

2017 ◽  
Vol 9 (2) ◽  
pp. 1-9 ◽  
Author(s):  
Ben Xu ◽  
Yaming Liu ◽  
Dongning Wang ◽  
Dagong Jia ◽  
Chao Jiang
Keyword(s):  
Optical Fiber ◽  
Gas Pressure ◽  
Air Cavity ◽  
Pressure Sensing ◽  
Fabry Perot

An In-Fiber Dual Air-Cavity Fabry–Perot Interferometer for Simultaneous Measurement of Strain and Directional Bend

2017 ◽  
Vol 17 (11) ◽  
pp. 3362-3366 ◽  
Author(s):  
Yang Ouyang ◽  
Huiyong Guo ◽  
Xiaowei Ouyang ◽  
Yujia Zhao ◽  
Zhou Zheng ◽  
...  
Keyword(s):  
Simultaneous Measurement ◽  
Air Cavity ◽  
Fabry Perot

scholarly journals Active Compensation of Radiation Effects on Optical Fibers for Sensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8193
Author(s):  
Sohel Rana ◽  
Austin Fleming ◽  
Nirmala Kandadai ◽  
Harish Subbaraman
Keyword(s):  
Optical Fibers ◽  
Radiation Effects ◽  
Accurate Determination ◽  
Radiation Environment ◽  
Physical Parameters ◽  
Air Cavity ◽  
Sensing Applications ◽  
Fabry Perot ◽  
Radiation Induced

Neutron and gamma irradiation is known to compact silica, resulting in macroscopic changes in refractive index (RI) and geometric structure. The change in RI and linear compaction in a radiation environment is caused by three well-known mechanisms: (i) radiation-induced attenuation (RIA), (ii) radiation-induced compaction (RIC), and (iii) radiation-induced emission (RIE). These macroscopic changes induce errors in monitoring physical parameters such as temperature, pressure, and strain in optical fiber-based sensors, which limit their application in radiation environments. We present a cascaded Fabry–Perot interferometer (FPI) technique to measure macroscopic properties, such as radiation-induced change in RI and length compaction in real time to actively account for sensor drift. The proposed cascaded FPI consists of two cavities: the first cavity is an air cavity, and the second is a silica cavity. The length compaction from the air cavity is used to deduce the RI change within the silica cavity. We utilize fast Fourier transform (FFT) algorithm and two bandpass filters for the signal extraction of each cavity. Inclusion of such a simple cascaded FPI structure will enable accurate determination of physical parameters under the test.

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