scholarly journals A high sensitivity fiber Bragg grating seismic sensor system for intrusion detection

2019 ◽  
Author(s):  
Zhihui Sun ◽  
Meng Wang ◽  
Shujuan Li ◽  
Li Min ◽  
Yuanyuan Yang ◽  
...  
Keyword(s):  
Intrusion Detection ◽  
Fiber Bragg Grating ◽  
High Sensitivity ◽  
Sensor System ◽  
Bragg Grating

Development of an Optical Fiber Sensor with a D-shaped Fiber Bragg Grating Integrated in a Loop-mirror Optical Fiber Laser as a High Sensitivity Refractometer

2021 ◽  
Vol 32 ◽  
Author(s):  
Binh Pham Thanh ◽  
Thuy Van Nguyen ◽  
Van Hoi Pham ◽  
Huy Bui ◽  
Thi Hong Cam Hoang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Laser ◽  
Fiber Bragg Grating ◽  
Limit Of Detection ◽  
Optical Fiber Sensor ◽  
High Sensitivity ◽  
Optical Signal ◽  
Bragg Grating ◽  
Loop Mirror

In this paper, we report a new type of refractometer based on a D-shaped fiber Bragg grating (FBG) integrated in a loop-mirror optical fiber laser. This proposed sensor is used in wavelength interrogation method, in which the D-shaped FBG is applied as a refractive index (RI) sensing probe and a mirror to select mode of laser. The D-shaped FBG is prepared by the removal of a portion of the fiber cladding covering the FBG by means of side-polishing technique. The D-shaped FBG sensing probe integrated in a loop-mirror optical fiber laser with saturated pump technique, the characteristics of sensing signals have been improved to obtain stable intensity, narrower bandwidth and higher optical signal-to-noise ratio compare to normal reflection configuration. The limit of detection (LOD) of this sensor can be achieved to 2.95 x 10-4 RIU in the refractive index (RI) range of 1.42-1.44. Accordingly, we believe that the proposed refractometer has a huge potential for applications in biochemical-sensing technique.

Dynamic assessment of women pelvic floor function by using a fiber Bragg grating sensor system

2006 ◽  
Author(s):  
Luis A. Ferreira ◽  
Francisco M. Araújo ◽  
Teresa Mascarenhas ◽  
Renato M. Natal Jorge ◽  
António A. Fernandes
Keyword(s):  
Pelvic Floor ◽  
Fiber Bragg Grating ◽  
Dynamic Assessment ◽  
Fiber Bragg Grating Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Pelvic Floor Function ◽  
Floor Function ◽  
Bragg Grating Sensor

Design of a Sensor System Using Fiber Bragg Grating for Liquid Level and Liquid Density Measurement

2020 ◽  
Vol 18 (12) ◽  
pp. 889-893
Author(s):  
Kalyan Biswas
Keyword(s):  
Fiber Bragg Grating ◽  
Density Measurement ◽  
Sensor System ◽  
Liquid Level ◽  
Bragg Grating ◽  
Liquid Density ◽  
Bragg Wavelength ◽  
Sensing System ◽  
System A ◽  
Level Monitoring

In this work, a simple but versatile sensing system for very accurate sensing of liquid level and liquid density is presented. The sensor works based on basic strain sensitivity of Fiber Bragg Grating (FBG) and principle of liquid obeying Archimedes’ law of buoyancy. In this system, a cylindrical shaped mass suspended from a Fiber Bragg Grating and partially immersed in the liquid to be sensed. If the liquid level in the container or liquid density varies, that change the up thrust on the suspended mass and load on the Fiber will be changed accordingly. The change in the load on Fiber changes strain on the FBG and the reflected Bragg wavelength also changes. The proposed device with proper calibration should be able to carry out real time and nonstop liquid level and liquid density measurements. A mathematical analysis of the system considering liquid properties and geometrical structure of the suspended mass is presented here. Sensitivity of the system for liquid level monitoring is also reported. Achieved results shows the path for the utilization of the proposed sensor system for precise liquid density measurement and liquid level sensing in very large storage tanks used for commercial/residential applications.

Improved Accuracy of a Quasi-distributed Strain Sensor System by Using Fiber Bragg Grating Spectrum Restoration

2011 ◽  
Vol 61 (8) ◽  
pp. 750-754
Author(s):  
Gyoung-A KIM ◽  
 Jae-Soon YOON ◽  
Se-Jong BAIK ◽  
Kiegon IM*
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Improved Accuracy ◽  
Distributed Strain

Decoupling Dual Measurement Sensor System of Temperature and Strain Based on Twin-Core Fiber Cascaded with Fiber Bragg Grating

2015 ◽  
Vol 35 (5) ◽  
pp. 0506004
Author(s):  
康泽新 Kang Zexin ◽  
孙将 Sun Jiang ◽  
马林 Ma Lin ◽  
齐艳辉 Qi Yanhui ◽  
简水生 Jian Shuisheng
Keyword(s):  
Fiber Bragg Grating ◽  
Sensor System ◽  
Bragg Grating ◽  
Measurement Sensor ◽  
Core Fiber ◽  
Dual Measurement

scholarly journals Design and Modeling of a High Sensitivity Fiber Bragg Grating-Based Accelerometer

2019 ◽  
Vol 19 (14) ◽  
pp. 5439-5445
Author(s):  
Qinpeng Liu ◽  
Xue He ◽  
Xueguang Qiao ◽  
Tong Sun ◽  
Kenneth T. V. Grattan
Keyword(s):  
Fiber Bragg Grating ◽  
High Sensitivity ◽  
Bragg Grating
Sign in / Sign up

Export Citation Format

Share Document