Results 1 to 10 of about 276 (190)
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 +6 more sources
Review of Helical Long-Period Fiber Gratings
Photonics, 2021 In this paper, comprehensive remarks are given that focus on the main fabrications and wide applications of helical long-period fiber gratings (HLPGs).
Chao Ma, Jian Wang, Libo Yuan
doaj +3 more sources
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 +1 more source
Photonics, 2022 Phase-inserted fiber gratings (PI-FGs) refer to those gratings where there exist a number of the phase-shifts (spatial spacing) among different sections (or local periods) of the gratings themselves. All the PI-FGs developed to date can mainly be divided
Chengliang Zhu, Lei Wang, Hongpu Li
doaj +1 more source
Mode Characteristics and Sensing Performance of Fiber Gratings
Journal of Harbin University of Science and Technology, 2022 Fiber gratings are special optical fibers with a periodic refractive index distribution when the refractive index of the fiber core is modulated. Both the angle and period of the gratings have an influence on the sensing properties of the fiber gratings.
ZHANG Jun-xi +3 more
doaj +1 more source
Mechanically-Induced Long-Period Fiber Gratings Using Laminated Plates
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 +1 more source
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 +1 more source
Chemical sensors based on long period fiber gratings: A review
Results in Optics, 2021 Fiber optic devices are being increasingly employed in the fields of chemical and environmental sensing due to their important features, such as high accuracy, small size, chemical inertness, remote operation and multiplexing capabilities.
Flavio Esposito
doaj +1 more source
Virtual long-period fiber gratings [PDF]
SPIE Proceedings, 2004 In this paper a theoretical prediction of a new kind of in-fiber devices is presented. They behave essentially like long-period Bragg gratings except for the fact that they are not permanent but volatile. This is because these devices are not formed by the UV-induced increment of the refractive index but by the twisting of a pristine HiBi fiber.
Cesar Jauregui +5 more
openaire +1 more source
The calculation of a two-cascade long-period fiber grating of the refractive index
Физика волновых процессов и радиотехнические системы, 2022 A method is proposed for calculating the spectral characteristics of cascade long-period fiber gratings of the refractive index of the core based on the method of partial regions and decomposition. According to the method, the structure is represented as
Roman V. Budaragin +3 more
doaj +1 more source