LP01-LP11 mode conversion in a negative curvature hollow-core fiber by use of a long-period grating

2020 ◽  
Author(s):  
Pengcheng Zhao ◽  
Hoi Lut Ho ◽  
Wei Jin ◽  
Shangchun Fan ◽  
Shoufei Gao ◽  
...  
Keyword(s):  
Negative Curvature ◽  
Mode Conversion ◽  
Hollow Core ◽  
Long Period Grating ◽  
Long Period ◽  
Core Fiber

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.

Simplified hollow core fiber long period grating for detection of micro-curvature of power grid wires

Optik ◽  
2020 ◽  
Vol 208 ◽  
pp. 164003
Author(s):  
Kai Zhang ◽  
Jun Yuan ◽  
Wei Yao ◽  
Yang Zhao ◽  
Bo Wang ◽  
...  
Keyword(s):  
Power Grid ◽  
Hollow Core ◽  
Long Period Grating ◽  
Long Period ◽  
Core Fiber

Femtosecond pulse delivery using a chirped long-period grating of multi-mode fiber for mode conversion

2010 ◽  
Vol 57 (6) ◽  
pp. 485-491 ◽  
Author(s):  
J. Yao ◽  
L. Zhan ◽  
Y.X. Wang ◽  
H.G. Li ◽  
S.Y. Luo ◽  
...  
Keyword(s):  
Femtosecond Pulse ◽  
Mode Conversion ◽  
Long Period Grating ◽  
Long Period ◽  
Multi Mode

Acoustic sensitivity of the negative curvature hollow core fiber

2014 ◽  
Author(s):  
S.N. Turtaev ◽  
M.I. Belovolov ◽  
A.E. Levchenko ◽  
A. F. Kosolapov ◽  
A. D. Pryamikov ◽  
...  
Keyword(s):  
Negative Curvature ◽  
Hollow Core ◽  
Core Fiber ◽  
Acoustic Sensitivity
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