In Situ Monitoring of Fiber Bragg Grating Evolution During Femtosecond-laser Inscription Process

2016 ◽  
Author(s):  
Cyril Hnatovsky ◽  
Dan Grobnic ◽  
Stephen J. Mihailov
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
In Situ Monitoring ◽  
Bragg Grating

scholarly journals Corrigendum to “Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel”

2019 ◽  
Vol 2019 ◽  
pp. 1-1 ◽  
Author(s):  
Jinxing Lai ◽  
Junling Qiu ◽  
Haobo Fan ◽  
Qian Zhang ◽  
Zhinan Hu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Safety Assessment ◽  
In Situ Monitoring ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

scholarly journals In situ monitoring of photostriction in chalcogenide glass film using fiber Bragg grating sensors

2017 ◽  
Vol 11 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Sivakumar Gayathri ◽  
G. Sreevidya Varma ◽  
Gagandeep Singh ◽  
Bannur Nanjunda Shivananju ◽  
S. Sridevi ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Chalcogenide Glass ◽  
In Situ Monitoring ◽  
Bragg Grating ◽  
Glass Film ◽  
Fiber Bragg Grating Sensors

scholarly journals Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Jinxing Lai ◽  
Junling Qiu ◽  
Haobo Fan ◽  
Qian Zhang ◽  
Zhinan Hu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Wavelength Division Multiplexing ◽  
Electromagnetic Interference ◽  
Safety Assessment ◽  
Early Stage ◽  
Internal Force ◽  
In Situ Monitoring ◽  
Bragg Grating ◽  
Tunnel Structure

Compared with electrical strain gauges, fiber Bragg grating (FBG) sensing technology is a relatively novel method for tunnel structural health monitoring, which has a number of advantages including high accuracy, multiplexing, electromagnetic interference resistance, and good repeatability. In order to study the internal force of the tunnel liner and detect the potential safety hazards, series of strain monitoring tests of a loess tunnel, taking into account the complex stress and strain variation of the loess during tunnelling, were performed by employing the tandem linear FBG sensor arrays controlled by the wavelength division multiplexing (WDM) technology. The concrete strain has obvious linear characteristics over time in the early stage and then gradually tends to a stable value. Moreover, after the necessary temperature compensation, loess tunnel structure safety was assessed through the analysis of real-time strain and internal force of the liner concrete, and the FBG monitoring data and safety assessment results indicate that the safety factors of various liner sections all meet the code requirements, which verify the safety and stability of the tunnel liner structure. The FBG sensors-based in situ monitoring technology can be well applied in the loess tunnel structure safety assessment.

Phase-shifted fiber Bragg grating inscription by fusion splicing technique and femtosecond laser

2016 ◽  
Vol 86 ◽  
pp. 236-241 ◽  
Author(s):  
Yajun Jiang ◽  
Yuan Yuan ◽  
Jian Xu ◽  
Dexing Yang ◽  
Dong Li ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
Bragg Grating

First-order fiber Bragg grating inscription in indium fluoride fiber using a UV/Vis femtosecond laser and two-beam interferometry

2021 ◽  
Vol 46 (8) ◽  
pp. 1816
Author(s):  
Ismael Chiamenti ◽  
Tino Elsmann ◽  
Aaron Reupert ◽  
Oguzhan Kara ◽  
Martin Becker ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
First Order ◽  
Fluoride Fiber

scholarly journals Femtosecond-Laser-Assisted Fabrication of Radiation-Resistant Fiber Bragg Grating Sensors

2022 ◽  
Vol 12 (2) ◽  
pp. 886
Author(s):  
Hun-Kook Choi ◽  
Young-Jun Jung ◽  
Bong-Ahn Yu ◽  
Jae-Hee Sung ◽  
Ik-Bu Sohn ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
Optical Fibers ◽  
Coming Out ◽  
Single Mode ◽  
Femtosecond Laser Irradiation ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Radiation Resistant ◽  
Fbg Sensors

This paper demonstrates the fabrication of radiation-resistant fiber Bragg grating (FBG) sensors using infrared femtosecond laser irradiation. FBG sensors were written inside acrylate-coated fluorine-doped single-mode specialty optical fibers. We detected the Bragg resonance at 1542 nm. By controlling the irradiation conditions, we improved the signal strength coming out from the FBG sensors. A significant reduction in the Bragg wavelength shift was detected in the fabricated FBG sensors for a radiation dose up to 105 gray, indicating excellent radiation resistance capabilities. We also characterized the temperature sensitivity of the radiation-resistant FBG sensors and detected outstanding performance.

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