Weight sensor by 3D printed mechanically induced long-period fiber grating for power control inside single-mode fiber

Sensing performances of ultrashort (as low as 2.4 mm) long-period fiber gratings fabricated with CO2 laser radiation using commercial single mode fibers are presented. These lengths are, to our knowledge, the shortest of those found in the literature for this kind of sensors, approaching those typical in fiber Bragg gratings. Sensitivity to temperature and refractive index are demonstrated, with performances within the range expected for a single LPFG written on a single mode fiber without any enhancing technique. Analysis on results is made based on both theoretical and experimental data.

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Long Period Fiber Grating in Eccentric Core Single Mode Fiber

26th International Conference on Optical Fiber Sensors ◽

10.1364/ofs.2018.the84 ◽

2018 ◽

Author(s):

Xiaofeng Xu ◽

Xiaowei Ouyang ◽

Ciming Zhou ◽

Cui Zhang ◽

Ai Zhou ◽

...

Keyword(s):

Single Mode ◽

Single Mode Fiber ◽

Fiber Grating ◽

Long Period Fiber Grating ◽

Long Period ◽

Period Fiber Grating

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Experimental study of concatenated long period fiber grating separated by a single mode fiber as refractive index sensor

2016 IEEE 6th International Conference on Photonics (ICP) ◽

10.1109/icp.2016.7510009 ◽

2016 ◽

Author(s):

Anjli Baliyan ◽

Enakshi K. Sharma

Keyword(s):

Experimental Study ◽

Refractive Index ◽

Single Mode ◽

Single Mode Fiber ◽

Refractive Index Sensor ◽

Fiber Grating ◽

Long Period Fiber Grating ◽

Long Period ◽

Period Fiber Grating

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Resin Made Long-Period Fiber Grating Structure for Tunable Optical Filter inside Single-Mode Fiber

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.861.259 ◽

2020 ◽

Vol 861 ◽

pp. 259-263

Author(s):

Ravivudh Khun-In ◽

Yuji Usuda ◽

Yuttapong Jiraraksopakun ◽

Apichai Bhatranand ◽

Hideki Yokoi

Keyword(s):

Optical Filter ◽

Single Mode ◽

Grating Period ◽

Single Mode Fiber ◽

Fiber Axis ◽

Wavelength Shift ◽

Fiber Grating ◽

Long Period Fiber Grating ◽

Long Period ◽

Period Fiber Grating

The rectangular-structured resin with one of its triangular long-period fiber grating surface is designed and printed out by using a high resolution 3D printer, so called long-period fiber grating (LPFG) resin. This LPFG resin is directly pressed on the bare single-mode fiber by a digital force meter to filter out partial band of light inside the fiber. The grating period is expanded by tilting the resin from the initial fiber axis. The optical filter is observed as resonant wavelengths from the broadband wavelength. The results show that the resonant wavelength shift is a linear function of the grating period with the coefficient of determination over 0.99. The proposed scheme has a great potential to be employed as a sensor such as a selective optical filter and a buried intrusion sensor.

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

Journal of Sensors ◽

10.1155/2018/4131790 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6 ◽

Cited By ~ 1

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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