Compact and high sensitivity curvature sensor based on twin core fiber coupler

2012 ◽  
Author(s):  
Guolu Yin ◽  
Shuqin Lou ◽  
Hui Zou
Keyword(s):  
High Sensitivity ◽  
Fiber Coupler ◽  
Core Fiber ◽  
Curvature Sensor

High-sensitivity Curvature Sensor based on Two-Core Fiber

2014 ◽  
Author(s):  
J. R. Guzmán-Sepúlveda ◽  
M. A. Fuentes-Fuentes ◽  
J. J. Sanchez-Mondragon ◽  
D. A. May Arrioja
Keyword(s):  
High Sensitivity ◽  
Core Fiber ◽  
Curvature Sensor

scholarly journals Mid-infrared photoacoustic gas monitoring driven by a gas-filled hollow-core fiber laser

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yazhou Wang ◽  
Yuyang Feng ◽  
Abubakar I. Adamu ◽  
Manoj K. Dasa ◽  
J. E. Antonio-Lopez ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Signal To Noise Ratio ◽  
High Sensitivity ◽  
Laser Source ◽  
High Signal ◽  
Mid Infrared ◽  
Raman Fiber Laser ◽  
Custom Made ◽  
Core Fiber ◽  
Detection Technologies

AbstractDevelopment of novel mid-infrared (MIR) lasers could ultimately boost emerging detection technologies towards innovative spectroscopic and imaging solutions. Photoacoustic (PA) modality has been heralded for years as one of the most powerful detection tools enabling high signal-to-noise ratio analysis. Here, we demonstrate a novel, compact and sensitive MIR-PA system for carbon dioxide (CO2) monitoring at its strongest absorption band by combining a gas-filled fiber laser and PA technology. Specifically, the PA signals were excited by a custom-made hydrogen (H2) based MIR Raman fiber laser source with a pulse energy of ⁓ 18 μJ, quantum efficiency of ⁓ 80% and peak power of ⁓ 3.9 kW. A CO2 detection limit of 605 ppbv was attained from the Allan deviation. This work constitutes an alternative method for advanced high-sensitivity gas detection.

High sensitivity fiber refractive index sensor using tapered 4-core fiber

2021 ◽  
Author(s):  
Zhen Tian ◽  
Lina Suo ◽  
Nan-Kuang Chen ◽  
Yicun Yao ◽  
Liqiang Zhang ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Core Fiber

Side polished twin-core fiber coupler

2015 ◽  
Author(s):  
Xianbin Wang ◽  
Libo Yuan
Keyword(s):  
Fiber Coupler ◽  
Core Fiber

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.

A fiber-optic bending curvature sensor based on thin-core fiber modal interferometer

2012 ◽  
Vol 38 (1) ◽  
pp. 79-82 ◽  
Author(s):  
WU Haowei ◽  
YING Chaofu ◽  
PENG Baojin ◽  
PANG Hui ◽  
ZHAO Yahui ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Core Fiber ◽  
Curvature Sensor

scholarly journals An in-line Mach-Zehnder Interferometer Using Thin-core Fiber for Ammonia Gas Sensing With High Sensitivity

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Xinyue Huang ◽  
Xueming Li ◽  
Jianchun Yang ◽  
Chuanyi Tao ◽  
Xiaogang Guo ◽  
...  
Keyword(s):  
Gas Sensing ◽  
High Sensitivity ◽  
Zehnder Interferometer ◽  
Ammonia Gas ◽  
Core Fiber ◽  
Mach Zehnder Interferometer
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