Radiation Effects on Long Period Fiber Gratings: A Review [PDF]
Sensors, 2020 Over the last years, fiber optic sensors have been increasingly applied for applications in environments with a high level of radiation as an alternative to electrical sensors, due to their: high immunity, high multiplexing and long-distance monitoring ...
Flavio Esposito +3 more
doaj +8 more sources
Simulation of the Transmission Spectrum of Long-Period Fiber Gratings Structures with a Propagating Acoustic Shock Front [PDF]
Sensors, 2021 In this paper, we investigate modification of transmission spectra of long-period fiber grating structures with an acoustic shock front propagating along the fiber.
Oleg V. Ivanov +2 more
doaj +2 more sources
Mechanically-Induced Long-Period Fiber Gratings Using Laminated Plates [PDF]
Sensors, 2020 This work presents a formation method of mechanically-induced long-period fiber gratings using laminated plates. The mechanically-induced long-period fiber grating is temporarily inscribed by compressing the optical fiber between a flat plate and the ...
Ismael Torres-Gómez +2 more
doaj +2 more sources
Arc-Induced Long-Period Fiber Gratings at INESC TEC. Part I: Fabrication, Characterization and Mechanisms of Formation [PDF]
Sensors, 2021 In this work, we reviewed the most important achievements of INESC TEC related to the fabrication of long-period fiber gratings using the electric arc technique.
Gaspar Rego +2 more
doaj +2 more sources
High Sensitivity Cryogenic Temperature Sensors Based on Arc-Induced Long-Period Fiber Gratings [PDF]
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
doaj +2 more sources
Effect of Low-Doses of Gamma Radiation on Electric Arc-Induced Long Period Fiber Gratings [PDF]
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
doaj +2 more sources
Arc-Induced Long-Period Fiber Gratings at INESC TEC. Part II: Properties and Applications in Optical Communications and Sensing [PDF]
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
doaj +2 more sources
Monitoring of Curing Process of Epoxy Resin by Long-Period Fiber Gratings [PDF]
SensorsThe curing of epoxy resin is a complex thermo-chemical process that is difficult to monitor using existing sensing systems. We monitored the curing process of an epoxy resin by using long-period fiber gratings.
Oleg V. Ivanov +3 more
doaj +2 more sources
Spectral Characteristics of Square-Wave-Modulated Type II Long-Period Fiber Gratings Inscribed by a Femtosecond Laser [PDF]
Sensors, 2021 We study here the spectral characteristics of square-wave-modulated type II long-period fiber gratings (LPFGs) inscribed by a femtosecond laser.
Xiaofan Zhao +5 more
doaj +2 more sources
Recent Progress in Fabrications and Applications of Heating-Induced Long Period Fiber Gratings [PDF]
Sensors, 2019 This paper presents a review of our work concerning the recent progress in fabrications and applications of heating-induced long period fiber gratings (LPFGs).
Cailing Fu +6 more
doaj +2 more sources