Long Period Gratings in New Generation Optical Fibers

Iadicicco, Agostino; Paladino, Domenico; Pilla, P.; Campopiano, Stefania; Cutolo, A.; Cusano, A.

doi:10.5772/27910

Cited by 5 publications

(2 citation statements)

References 134 publications

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“…Their work also discussed the sensitivity of LPGs to strain and temperature induced effects, establishing the basis for their use in sensing applications [2] [3]. From that work, great efforts have been carried out by the scientific communities and many papers have been published on this topic [4][5] [6] [7].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Long-Period Gratings Written in Standard and Fluorine-Doped Fibers by Electric Arc Discharge

et al. 2016

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In this paper, we present a comparative study of long-period gratings (LPGs) written in the standard Ge-doped fiber and in two different fluorine-doped fibers by means of the electric arc discharge (EAD)-based technique. Concerning Ge-doped fibers, we present an assessment of the EAD procedure by fabricating relatively short LPGs with deep attenuation bands (up to 32 dB) and trivial power losses. We also demonstrate the ability to manage the effect of the single EAD perturbation to select grating length, which in turn acts on the bandwidth of attenuation bands, without compromising depth. Furthermore, for the first time, we produced LPGs in F-doped fibers with attenuation bands deeper than 30 dB, demonstrating the dependence of the spectra on the grating period. Finally, we illustrate a comparative experimental study on the sensitivity of LPGs fabricated in the standard and F-doped fibers with surrounding refractive index (SRI) and temperature changes. We proved that the SRI response of LPGs in F-doped fibers is significantly higher than in the standard fiber and it strongly depends on the type of F-doped fiber considered. LPGs written in F-doped fibers exhibit a slightly lower temperature sensitivity (in the range 20-30 pm/°C for λres2 cladding mode) than the LPG in the standard fiber (45 pm/°C)

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Section: Introductionmentioning

confidence: 99%

Comparative Study of Long-Period Gratings Written in Standard and Fluorine-Doped Fibers by Electric Arc Discharge

et al. 2016

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“…Within sensors based on Bragg gratings there are two types of gratings: short and long period fiber gratings (LPFG). Short period Bragg gratings show periodic perturbations with periodicities under 100 µm [8]. For LPFG the periodicities are from 100 µm up to 1000 µm [9] [10].…”

Section: Introductionmentioning

confidence: 99%

Optical Fiber Torsion Sensor with Mechanically Induced Long Period Fiber Gratings in Rare-Earth Doped Fibers

Pulido-Navarro¹,

Álvarez-Chávez²,

Ceballos-Herrera³

et al. 2014

OPJ

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In this work wavelength sensitivity in mechanically induced long period fiber gratings (MLPFG) is analyzed. This analysis is first carried out both in standard single-mode fiber SMF-28 and in Er-doped fibers. The mechanical analysis for both types of fibers under different torsion conditions is presented. In order to apply the torsion one of the fiber ends is fixed while torsion is applied on the other end. A MLPFG whose period is 503 µm is used to press the fiber after torsion is applied. This allows for micro curvatures to be formed on the fiber, which in turn generates a periodical index perturbation on it. Here, it was noted that the sensitive wavelength shift of the rejection bands is bigger for Er-doped fibers. For a torsion of 6 turns applied to 10 cm of doped fiber the wavelength peaks can be moved up to 25 nm, which is longer to what was detected on standard fibers. Therefore, by using Er-doped fibers to monitor torsion on structures will give more sensitive and accurate results than using standard fibers. These results can be employed for sensing applications, especially for small to medium size structures, which can be mechanical, civil or aeronautics.

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Optical Fiber-Based Sensor for Assessing Electric Current in Unmanned Aerial Vehicles with ROS Interface

Delgado

Jucá

Marcato

et al. 2018

2018 IEEE International Conference on Robotics and Automation (ICRA)

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Long Period Gratings in New Generation Optical Fibers

Cited by 5 publications

References 134 publications

Comparative Study of Long-Period Gratings Written in Standard and Fluorine-Doped Fibers by Electric Arc Discharge

Comparative Study of Long-Period Gratings Written in Standard and Fluorine-Doped Fibers by Electric Arc Discharge

Optical Fiber Torsion Sensor with Mechanically Induced Long Period Fiber Gratings in Rare-Earth Doped Fibers

Optical Fiber-Based Sensor for Assessing Electric Current in Unmanned Aerial Vehicles with ROS Interface

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