We have demonstrated the feasibility of achieving high-performance fiber polarizers (insertion loss <0.5 dB, extinction ratio >30 dB), based on
In this work, for the first time, we demonstrate long period gratings (LPG) in nanostructured optical fibers and their response to gamma radiation. Nanostructured fibers show distinctive features
A SMF-MMF-SMF-ultra long period fiber grating (SMS-ULPFG) sensor is proposed for the simultaneous measurement of axial strain and temperature. The all
One such fabrication technique involves superimposing a long-period fiber grating (LPG) on an FBG using a CO2 laser or the use of amplitude masks to create the modulation of the
In this study, a numerical simulation method was employed to investigate and analyze superstructure fiber Bragg gratings (SFBGs) with five
In this chapter we will make a review of the relevant aspects of LPFGs.
Inspiring quick, reliable, and real-time measurements, biomass detection, chemical detection for long-period fiber grating (LPFG), for scientific, commercial, and defense applications. In
18 June 1998 Fiber Bragg grating with long-period fiber grating superstructure for simultaneous strain and temperature measurement
The effects of the length of the fiber between long-period grating (LPG) and fiber Bragg grating (FBG), the film refractive index and thickness on the reflection spectra of coated CLPG are discussed.
2. Fabrication methods of long-period fibre gratings The inscription of long-period gratings on optical fibre basically consists in the generation of a periodical perturbation of the refractive index in the
Specifically, long period gratings (LPG) have been mechanically induced in different optical fibers through a 3D printed nearly sinusoidal grooved structure. LPGs have been mechanically induced in
Abstract In this paper, we demonstrate the transmission spectral and surrounding refractive index (SRI) sensing performance of long-period fiber
Abstract In this paper, the fabrication of arched fiber core based on single-mode fiber is first proposed and experimentally studied about the relevant sensing characteristics. A novel kind of
For example, very recently, Morana et al. 5 performed a thorough review about the radiation effects on fiber Bragg gratings (FBG) focused on
This paper presents a review of the evolution of LPFGs, with a specific focus on the progression and current trends of mechanically induced long
Abstract: We develop a two-step infrared (IR) femtosecond fiber laser exposure technique to flexibly fabricate long period fiber gratings (LPFGs) with a high peak band-rejection efficiency of 35.4
Multicore optical fibers are especially attractive for the fabrication of curvature and shape sensors due to the spatial distribution of the different cores. Fiber Bragg gratings have been used in the past for the
In this paper, we propose a new technique to fabricate long period gratings (LPGs) by mechanically applying a force to an optical fiber enclosed in a
A long-period fiber grating is an optical fiber structure with the properties periodically varying along the fiber, such that the conditions for the interaction of several copropagating modes are satisfied.
For the superstructure fiber grating (SFG) consisting of a fiber Bragg grating (FBG) and a long period fiber grating (LPFG), a similarity transformation method for the coupled mode equations
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. The polarization dependence loss, the spectral
Results explain a quick and easy (pbp) technique of producing uniform grating''s structure using single mode fibres. In the resulting gratings were
Abstract: We demonstrate a phase-shifted superstructure fiber Bragg grating (PSSFBG) fabricated using a femtosecond laser-based point-by-point direct writing technique.
Abstract: The fabrication and characterization of high quality ultra-long (up to 1m) fiber Bragg gratings (FBGs) is reported. A moving phase mask and an electro-optic phase-modulation (EOPM) based
This paper introduces a novel technique to simultaneously measure temperature and strain using a single 5 mm femtosecond laser-inscribed superstructure fiber Bragg grating (SFBG).
We simulate transmission through inhomogeneous long-period fiber gratings, -shift and reflective -shift gratings deformed by an acoustic shock front. Coupled mode equations describing interaction of co
IBER GRATINGS have developed into important com-ponents for many applications in telecommunications and fiber sensor systems . Fiber gratings are broadly classified into two
A long-period fiber grating couples light from a guided mode into forward propagating cladding modes where it is lost due to absorption and scattering. The coupling from the guided mode to cladding
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