Results 11 to 20 of about 276 (190)
Arc-Induced Long Period Gratings in Erbium-Doped Fiber
IEEE Photonics Journal, 2019 In this paper, we report about the fabrication of long period gratings (LPGs) directly into an Erbium-doped fiber, by using the electric arc discharge technique. The attention is focused on the writing process and the resulting properties, by considering
Flavio Esposito +2 more
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Long-period gratings in chalcogenide fibers
Optics Express, 2006 We report the first demonstration of long period gratings in single mode As(2)Se(3) chalcogenide glass fiber. The grating is implemented by pressing a threaded rod against a short piece of fiber. Its strength can be tuned over a 25 dB range, has high repeatability, and is fully reversible.
Dominik, Pudo +2 more
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Transverse Load and Temperature Sensing Using Multiplexed Long-Period Fiber Gratings
Photonics, 2020 The simultaneous measurement of transverse load and temperature using two long-period fiber gratings multiplexed in the wavelength domain is presented experimentally.
Ismael Torres-Gómez +4 more
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Sensing Features of Arc-induced Long Period Gratings
Proceedings, 2019 In this work, we report a systematic investigation about the sensitivity of arc-induced Long Period Gratings in standard SMF28 fiber. Several gratings were fabricated with period Λ in range 330−630 µm and characterized towards changes in ...
Flavio Esposito +3 more
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Arc-Induced Long Period Fiber Gratings [PDF]
Journal of Sensors, 2016 Long period fiber gratings produced by the electric arc technique have found an increasing interest by the scientific community due to their ease to fabricate, virtually enabling the inscription in any kind of fiber, low cost, and flexibility. In 2005 we have presented the first review on this subject.
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Fabrication of long period fiber gratings of subnanometric bandwidth [PDF]
Optics Letters, 2017 This Letter reports on the fabrication of long period fiber gratings having subnanometric bandwidths in the 1500 nm spectral region. Large gratings have been photo inscribed in a high NA fiber; the grating pitch and the order of the HE cladding mode are optimized to produce gratings with a large number of periods and prevent the coupling to TE, TM, or ...
Poveda-Wong, L. +5 more
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Optical Fiber Interferometers Based on Arc-Induced Long Period Gratings at INESC TEC
Sensors, 2021 In this work, we review the most important achievements of an INESC TEC long-period-grating-based fiber optic Michelson and Mach–Zehnder configuration modal interferometer with coherence addressing and heterodyne interrogation as a sensing structure for ...
Paulo Caldas, Gaspar Rego
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High Sensitivity Cryogenic Temperature Sensors Based on Arc-Induced Long-Period Fiber Gratings
Sensors, 2022 In this paper, we investigated the evolution of the dispersion curves of long-period fiber gratings (LPFGs) from room temperature down to 0 K. We considered gratings arc-induced in the SMF28 fiber and in two B/Ge co-doped fibers.
Oleg V. Ivanov +2 more
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Effect of Low-Doses of Gamma Radiation on Electric Arc-Induced Long Period Fiber Gratings
Sensors, 2021 This work presents an experimental study on the effects of gamma radiation on Long Period Fiber Gratings (LPFGs) in a low-dose test campaign to evaluate their eventual degradation.
Patricia Mesonero-Santos +6 more
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Sensors, 2021 In this work, we review the most important achievements of INESC TEC related to the properties and applications of arc-induced long-period fiber gratings.
Gaspar Rego +2 more
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