scholarly journals High-sensitivity photoacoustic gas detector by employing multi-pass cell and fiber-optic microphone

2020 ◽  
Vol 28 (5) ◽  
pp. 6618 ◽  
Author(s):  
Bo Zhang ◽  
Ke Chen ◽  
Yewei Chen ◽  
Beilei Yang ◽  
Min Guo ◽  
...  
Keyword(s):  
Fiber Optic ◽  
High Sensitivity ◽  
Gas Detector

High-sensitivity fiber optic magnetic field sensor based on lossy mode resonance and hollow core-offset structure

2021 ◽  
pp. 1-12
Author(s):  
Xue-Peng Jin ◽  
Hong-Zhi Sun ◽  
Shuo-Wei Jin ◽  
Wan-Ming Zhao ◽  
Jing-Ren Tang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
Hollow Core ◽  
Field Sensor

scholarly journals Compact Tb doped fiber optic current sensor with high sensitivity

2015 ◽  
Vol 23 (23) ◽  
pp. 29993 ◽  
Author(s):  
Duanni Huang ◽  
Sudharsanan Srinivasan ◽  
John E. Bowers
Keyword(s):  
Fiber Optic ◽  
High Sensitivity ◽  
Current Sensor

scholarly journals Fabrication of Transition-metal (Zn, Mn, Cu)-based MOFs as Efficient Sensor Materials for Detection of H2 Gas by Clad Modified Fiber Optic Gas Sensor Technique

2021 ◽  
Author(s):  
M Nagoor Meeran ◽  
S.P. Saravanan ◽  
H.H Hegazy
Keyword(s):  
Transition Metal ◽  
Fiber Optic ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Long Term Stability ◽  
Sensing Material ◽  
Sensor Technique ◽  
Recent Developments ◽  
Metal Organic ◽  
Elevated Surface

Abstract Recent research demonstrate that promising gas sensing materials are called metal-organic structures (MOFs) and their products due to their tunable form, elevated surface area, and extremely porous structure and physisorption towards gases with relatively low temperature.In this report, recent developments in transition-metal (Zn, Mn, Cu)-based MOFs and their derivatives are synthesized as sensing materials. The sensors samples were analyzed by XRD, SEM, TEM, BET and XPS in order to know the textural, structural and electronic state of the samples. Fiber optic clad modified sensors were fabricated and tested gas sensing properties towards H2 gas with various concentrations (0-1000 ppm). Among the three sensing material, Zn doped MOFs sensor showed outstanding selectivity with high sensitivity (115 counts/kpa) towards H2 gas. Moreover, it has shown high response (20 s) and recovery time (27 s) as well as long term stability. The designed sensors may be required to apply to the production of an outstanding sensor for H2 for commercial uses.

scholarly journals 2D Propagation Simulation of Variation Parameters of U-shape Fiber Optic

2020 ◽  
Vol 10 (2) ◽  
pp. 153-158
Keyword(s):  
Fiber Optics ◽  
Power Flow ◽  
Fiber Optic ◽  
Power Transmission ◽  
Simulation Analysis ◽  
Reducing Power ◽  
High Sensitivity ◽  
Curvature Radius ◽  
Sensor Applications ◽  
Core Fiber

Fiber optic has extraordinary properties and is suitable in sensor applications due to its special potential. Currently, macro bending characteristics of newly developed hetero core fiber optic element are designed and evaluated. This paper presents the preliminary results obtained from the numerical simulation analysis of the bending sensitivity of U-shape fiber optics toward the 2D electromagnetic wave in terms of mesh, curvature radius, core fiber size, and turn number. Fiber optics with core sizes of 4, 9, 50, and 62.5 μm were designed. In addition, the combination of core diameters 50-4-50, 50-9-50, 62.5-4-62.5, and 62.5-9-62.5 μm is evaluated to compare the outcome of transmission power in terms of hetero core structure of fiber optic. Simulation is performed using COMSOL Multiphysics simulation tool. The developed U-shape fiber optic is designed to sense the distortion of reducing power transmission by comparing input and output power. Results show that the selected mesh depends on the size of geometry bending fiber optics, and fine and finer mesh is the best for U-shape fiber optic. Furthermore, the power flow on the fiber decreases with the decreasing curvature radius and increasing turn number. The fiber with a core size combination of 62.5–4–62.5 um has high sensitivity in terms of loss. The attained results possess higher potential in the field of sensor applications, such as displacement, strain, pressure, and monitoring respiration, on human body. This study serves as a basis for further investigation of nanomaterial coating on fiber optics, thereby enhancing its credibility for sensing.

scholarly journals High-Sensitivity Fiber-Optic Ultrasound Sensors for Medical Imaging Applications

1998 ◽  
Vol 20 (2) ◽  
pp. 103-112 ◽  
Author(s):  
H. Wen ◽  
D.G. Wiesler ◽  
A. Tveten ◽  
B. Danver ◽  
A. Dandridge
Keyword(s):  
Medical Imaging ◽  
Optical Fibers ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Single Mode ◽  
Piezoelectric Sensors ◽  
Single Element ◽  
Bending Radius ◽  
Laser Interferometers

This paper presents several designs of high-sensitivity, compact fiber-optic ultrasound sensors that may be used for medical imaging applications. These sensors translate ultrasonic pulses into strains in single-mode optical fibers, which are measured with fiber-based laser interferometers at high precision. The sensors are simpler and less expensive to make than piezoelectric sensors, and are not susceptible to electromagnetic interference. It is possible to make focal sensors with these designs, and several schemes are discussed. Because of the minimum bending radius of optical fibers, the designs are suitable for single element sensors rather than for arrays.

High-sensitivity fiber-optic Fabry-Perot transverse load sensor based on bubble microcavity

2022 ◽  
pp. 113375
Author(s):  
Xiaoli Zhang ◽  
Xinlei Zhou ◽  
Shuo Wang ◽  
Pengcheng Tao ◽  
Fengxiang Ma ◽  
...  
Keyword(s):  
Fiber Optic ◽  
High Sensitivity ◽  
Transverse Load ◽  
Fabry Perot ◽  
Load Sensor

High sensitivity optical receivers for 1.0-1.4 µm fiber-optic systems

1978 ◽  
Vol 14 (11) ◽  
pp. 800-804 ◽  
Author(s):  
L. Tomasetta ◽  
H. Law ◽  
R. Eden ◽  
I. Deyhimy ◽  
K. Nakano
Keyword(s):  
Fiber Optic ◽  
High Sensitivity ◽  
Optical Receivers ◽  
Optic Systems

Field test investigation of high sensitivity fiber optic seismic geophone

2017 ◽  
Author(s):  
meng wang ◽  
li min ◽  
faxiang zhang ◽  
xiaolei zhang ◽  
zhihui sun ◽  
...  
Keyword(s):  
Field Test ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Test Investigation

High-sensitivity fiber-optic humidity sensor based on microfiber overlaid with niobium disulfide

2020 ◽  
Vol 55 (35) ◽  
pp. 16576-16587
Author(s):  
Enze Zhang ◽  
Dongqin Lu ◽  
Shuo Zhang ◽  
Xun Gui ◽  
Heyuan Guan ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Niobium Disulfide
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