Gas sensing with mode-phase-difference photothermal spectroscopy assisted by a long period grating in a dual-mode negative-curvature hollow-core optical fiber

2020 ◽  
Vol 45 (20) ◽  
pp. 5660
Author(s):  
Pengcheng Zhao ◽  
Hoi Lut Ho ◽  
Wei Jin ◽  
Shangchun Fan ◽  
Shoufei Gao ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Phase Difference ◽  
Negative Curvature ◽  
Gas Sensing ◽  
Hollow Core ◽  
Photothermal Spectroscopy ◽  
Dual Mode ◽  
Long Period Grating ◽  
Long Period

scholarly journals Mode-phase-difference photothermal spectroscopy for gas detection with an anti-resonant hollow-core optical fiber

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Pengcheng Zhao ◽  
Yan Zhao ◽  
Haihong Bao ◽  
Hoi Lut Ho ◽  
Wei Jin ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Phase Difference ◽  
Gas Detection ◽  
Hollow Core ◽  
Photothermal Spectroscopy

scholarly journals Refractive Index Sensors Based on Long-Period Grating in a Negative Curvature Hollow-Core Fiber

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1803
Author(s):  
Hanna Izabela Stawska ◽  
Maciej Andrzej Popenda
Keyword(s):  
Refractive Index ◽  
Negative Curvature ◽  
Hollow Core ◽  
Long Period Grating ◽  
Fiber Gratings ◽  
Long Period ◽  
Analytical Formulas ◽  
Core Fiber ◽  
Refractive Index Sensors ◽  
Transmission Windows

Long-period optical fiber gratings (LPGs) are one of the widely used concepts for the sensing of refractive index (RI) changes. Negative curvature hollow-core fibers (NCHCFs), with their relatively large internal diameters that are easy to fill with liquids, appear as a very interesting medium to combine with the idea of LPGs and use for RI sensing. However, to date, there has been no investigation of the RI sensing capabilities of the NCHCF-based LPGs. The results presented in the paper do not only address this matter, but also compare the RI sensitivities of the NCHCFs alone and the gratings. By modeling two revolver-type fibers, with their internal diameters reflecting the results of the possible LPG-inscription process, the authors show that the fibers’ transmission windows shift in response to the RI change, resulting in changes in RI sensitivities as high as −4411 nm/RIU. On the contrary, the shift in the transmission dip of the NCHCF-based LPGs corresponds to a sensitivity of −658 nm/RIU. A general confirmation of these results was ensured by comparing the analytical formulas describing the sensitivities of the NCHCFs and the NCHCF-based LPGs.

Optical fiber long period grating sensor with a polyelectrolyte alternate thin film for gas sensing of amine odors

2013 ◽  
Vol 185 ◽  
pp. 117-124 ◽  
Author(s):  
Tao Wang ◽  
Sergiy Korposh ◽  
Stephen James ◽  
Ralph Tatam ◽  
Seung-Woo Lee
Keyword(s):  
Thin Film ◽  
Optical Fiber ◽  
Gas Sensing ◽  
Long Period Grating ◽  
Long Period

A Long Period Grating Sensor Based on Helical Capillary Optical Fiber

2021 ◽  
pp. 1-1
Author(s):  
Hongchang Deng ◽  
Rui Wang ◽  
Xiaowen Jiang ◽  
Chuanxin Teng ◽  
Ronghui Xu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Long Period Grating ◽  
Long Period

On-line tests of an optical fiber long-period grating subjected to gamma irradiation

2014 ◽  
Author(s):  
D. Sporea ◽  
A. Stancalie ◽  
D. Negut ◽  
G. Pilorget ◽  
S. Delepine-Lesoille ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Gamma Irradiation ◽  
Long Period Grating ◽  
Long Period ◽  
On Line

scholarly journals Magnetic field sensor based on helical long-period grating with three-core optical fiber

2021 ◽  
Author(s):  
YuanYuan Zhao ◽  
Shen Liu ◽  
Cong Xiong ◽  
Ying Wang ◽  
Zhengyong Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Magnetic Field Sensor ◽  
Long Period Grating ◽  
Long Period ◽  
Field Sensor

Characterization of optical fiber long period grating refractometer with nanocoating

2011 ◽  
Vol 153 (2) ◽  
pp. 335-339 ◽  
Author(s):  
E. Simões ◽  
I. Abe ◽  
J. Oliveira ◽  
O. Frazão ◽  
P. Caldas ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Long Period Grating ◽  
Long Period

Mechanical rotation and bending sensing by chiral long-period grating based on an axis-offset rotating optical fiber

2019 ◽  
Vol 12 (7) ◽  
pp. 072013
Author(s):  
Ruiduo Wang ◽  
Zhaoyu Ren ◽  
Xudong Kong ◽  
Depeng Kong ◽  
Baowen Hu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Long Period Grating ◽  
Long Period ◽  
Mechanical Rotation ◽  
Axis Offset

A chiral long-period grating fabrication method based on axis-offset rotating optical fiber

2019 ◽  
Vol 51 (4) ◽  
Author(s):  
Xudong Kong ◽  
Liyong Ren ◽  
Jian Liang ◽  
Kaili Ren ◽  
Haijuan Ju ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fabrication Method ◽  
Long Period Grating ◽  
Grating Fabrication ◽  
Long Period ◽  
Axis Offset
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