Deflection measurement using long-period grating sensor fabricated on side-hole single-mode fiber by CO 2 -laser

2010 ◽  
Author(s):  
Juan Kang ◽  
Mengchao Li ◽  
Jianfeng Wang ◽  
Xinyong Dong
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Long Period Grating ◽  
Side Hole ◽  
Long Period ◽  
Deflection Measurement

Long-period grating based single-mode fiber to multi-core fiber pump coupler

2020 ◽  
Author(s):  
Liliana M. Sousa ◽  
Margarida Facão ◽  
Gil M. Fernandes ◽  
Rogério N. Nogueira ◽  
Ana M. Rocha
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Long Period Grating ◽  
Long Period ◽  
Core Fiber

Long-period grating fabricated by periodically tapering standard single-mode fiber

2008 ◽  
Vol 47 (10) ◽  
pp. 1549 ◽  
Author(s):  
Li-Yang Shao ◽  
Jian Zhao ◽  
Xinyong Dong ◽  
H. Y. Tam ◽  
C. Lu ◽  
...  
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Long Period Grating ◽  
Long Period

scholarly journals Ultrashort Long-Period Fiber Gratings Inscribed on a Single-Mode Fiber for Torsion Sensing Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Marta Nespereira ◽  
João M. P. Coelho ◽  
José Manuel Rebordão
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Wavelength Shift ◽  
Fiber Grating ◽  
Long Period ◽  
Sensing Applications ◽  
High Tension ◽  
Long Period Fiber Gratings ◽  
Order Of Magnitude ◽  
Period Fiber Grating

The response of ultrashort-length CO2-induced long-period fiber grating (LPFG) sensors to torsion is reported. While engraving using CO2 laser radiation, the fiber is submitted to high tension allowing the obtainment of gratings with shorter lengths, down to 2.4 mm, which is almost one order of magnitude lower than the usual. Also, the fiber is only irradiated in one side, creating an asymmetrical profile leading to highly birefringent gratings. Sensitivity to axial twists is demonstrated, with values up to 0.15 nm/(rad/m) for the resonant wavelength shift and higher than 0.03 dBm/(rad/m) for the variation in the intensity (attenuation). Discrimination between rotation directions, clockwise and counterclockwise, was observed.

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