scholarly journals Hollow Core Bragg Fiber-Based Sensor for Simultaneous Measurement of Curvature and Temperature

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7956
Author(s):  
Zongru Yang ◽  
Weihao Yuan ◽  
Changyuan Yu
Keyword(s):  
Transmission Spectrum ◽  
Simultaneous Measurement ◽  
Single Mode ◽  
Temperature Sensing ◽  
Wavelength Shift ◽  
Hollow Core ◽  
Bragg Structure ◽  
Bragg Fiber ◽  
External Perturbations ◽  
Two Parameters

In this paper, the hollow core Bragg fiber (HCBF)-based sensor based on anti-resonant reflecting optical waveguide (ARROW) model is proposed and experimentally demonstrated for simultaneous measurement of curvature and temperature by simply sandwiching a segment of HCBF within two single-mode fibers (SMFs). The special construction of a four-bilayer Bragg structure provides a well-defined periodic interference envelope in the transmission spectrum for sensing external perturbations. Owing to different sensitivities of interference dips, the proposed HCBF-based sensor is capable of dual-parameter detection by monitoring the wavelength shift. The highest curvature sensitivity of the proposed sensor is measured to be 74.4 pm/m−1 in the range of 1.1859–2.9047 m−1 with the adjusted R square value of 0.9804. In the meanwhile, the best sensitivity of temperature sensing was detected to be 16.8 pm/°C with the linearity of 0.997 with temperature range varying from 25 to 55 °C. Furthermore, with the aid of the 2 × 2 matrix, the dual demodulation of curvature and temperature can be carried out to realize the simultaneous measurement of these two parameters. Besides dual-parameter sensing based on wavelength shift, the proposed sensor can also measure temperature-insensitive curvature by demodulating the intensity of resonant dips.

Simultaneous measurement of temperature and strain based on a hollow core Bragg fiber

2020 ◽  
Vol 45 (22) ◽  
pp. 6122
Author(s):  
Yu Wang ◽  
Yan Zhou ◽  
Xinyu Wang ◽  
Daru Chen ◽  
Zhenggang Lian ◽  
...  
Keyword(s):  
Simultaneous Measurement ◽  
Hollow Core ◽  
Bragg Fiber

scholarly journals Simultaneous measurement of magnetic field and temperature based on two anti-resonant modes in hollow core Bragg fiber

2021 ◽  
Author(s):  
Yi Huang ◽  
Hong Qiu ◽  
Deng Chuanlu ◽  
Zhenggang Lian ◽  
Yong Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Simultaneous Measurement ◽  
Hollow Core ◽  
Bragg Fiber ◽  
Resonant Modes

scholarly journals Double Antiresonance Fiber Sensor for the Simultaneous Measurement of Curvature and Temperature

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7778
Author(s):  
Diana Pereira ◽  
Jörg Bierlich ◽  
Jens Kobelke ◽  
Marta S. Ferreira
Keyword(s):  
Optical Properties ◽  
Theoretical Model ◽  
Simultaneous Measurement ◽  
Internal Resonance ◽  
Optical Fiber Sensor ◽  
Single Mode ◽  
Fiber Sensor ◽  
Hollow Core ◽  
Core Fiber ◽  
Good Agreement

Antiresonant hollow core fibers (ARHCFs) have gained some attention due to their notoriously attractive characteristics on managing optical properties. In this work, an inline optical fiber sensor based on a hollow square core fiber (HSCF) is proposed. The sensor presents double antiresonance (AR), namely an internal AR and an external AR. The sensor was designed in a transmission configuration, where the sensing head was spliced between two single mode fibers (SMFs). A simulation was carried out to predict the behaviors of both resonances, and revealed a good agreement with the experimental observations and the theoretical model. The HSCF sensor presented curvature sensitivities of −0.22 nm/m−1 and −0.90 nm/m−1, in a curvature range of 0 m−1 to 1.87 m−1, and temperature sensitivities of 21.7 pm/°C and 16.6 pm/°C, in a temperature range of 50 °C to 500 °C, regarding the external resonance and internal resonance, respectively. The proposed sensor is promising for the implementation of several applications where simultaneous measurement of curvature and temperature are required.

Simultaneous Measurement of Strain and Temperature with Hollow Core Fiber Based Intermodal Interferometer

2013 ◽  
Vol 330 ◽  
pp. 231-236
Author(s):  
Fei Qi ◽  
Li Min Hu ◽  
Xin Yong Dong ◽  
Chun Liu Zhao ◽  
Shang Zhong Jin ◽  
...  
Keyword(s):  
Simultaneous Measurement ◽  
Single Mode ◽  
Fabrication Process ◽  
Experimental Results ◽  
Temperature Measurements ◽  
Silica Fiber ◽  
Hollow Core ◽  
Short Segment ◽  
Core Fiber

A hollow core fiber based all-fiber intermodal interferometer is proposed for measurement of strain and temperature. The sensing structure is simply a short segment of hollow core silica fiber being spliced between two normal single mode fibers. The fabrication process only involves a conventional fusion splicer and a mechanical fiber cleaver. Experimental results show that sensitivities of-1.21 pm/με and 21.30 pm/°C are achieved for strain and temperature measurements, respectively.

scholarly journals Compact omnidirectional multicore fiber-based vector bending sensor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Josu Amorebieta ◽  
Angel Ortega-Gomez ◽  
Gaizka Durana ◽  
Rubén Fernández ◽  
Enrique Antonio-Lopez ◽  
...  
Keyword(s):  
Single Mode ◽  
High Accuracy ◽  
Single Mode Fiber ◽  
Wavelength Shift ◽  
Short Segment ◽  
Light Power ◽  
Highly Sensitive ◽  
Bending Sensor ◽  
Asymmetric Multicore ◽  
Multicore Fiber

AbstractWe propose and demonstrate a compact and simple vector bending sensor capable of distinguishing any direction and amplitude with high accuracy. The sensor consists of a short segment of asymmetric multicore fiber (MCF) fusion spliced to a standard single mode fiber. The reflection spectrum of such a structure shifts and shrinks in specific manners depending on the direction in which the MCF is bent. By monitoring simultaneously wavelength shift and light power variations, the amplitude and bend direction of the MCF can be unmistakably measured in any orientation, from 0° to 360°. The bending sensor proposed here is highly sensitive even for small bending angles (below 1°).

scholarly journals Experimental Study on the Concept of Hollow-Core Photonic Bandgap Fiber Stethoscope

2018 ◽  
Vol 2018 ◽  
pp. 1-4
Author(s):  
Adel Abdallah
Keyword(s):  
Experimental Study ◽  
Relative Phase ◽  
Fiber Optic ◽  
Photonic Bandgap ◽  
Single Mode ◽  
Hollow Core ◽  
Photonic Bandgap Fiber ◽  
Photonic Bandgap Fibers ◽  
Relative Phase Shift ◽  
Phase Generated Carrier

An experiment is proposed to show the feasibility of using hollow-core photonic bandgap fibers (HC-PBF) in the fiber-optic interferometric stethoscopes to generally improve the sensitivity and overcome the problems associated with the electronic stethoscopes. In the experiment, the HC-1550 is used as a measuring arm of an unbalanced Mach-Zehnder interferometer (MZI) and the conventional single-mode optical fiber (SMF) is used as an isolated reference arm. Detection and demodulation of the relative phase shift is performed passively using phase-generated carrier homodyne technique (PGC). The proposed results indicate the significance of using HC-PBFs in the future stethoscopes.

Hollow core silicon-silica Bragg fiber

CLEO: 2015 ◽  
2015 ◽  
Author(s):  
Subhasis Chaudhuri ◽  
Justin R. Sparks ◽  
Rongrui He ◽  
John V. Badding
Keyword(s):  
Hollow Core ◽  
Bragg 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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