Arc-Induced Long-Period Fiber Gratings at INESC TEC. Part I
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.
Theory
Longperiod
Fiber
Gratings
ICOCN06_Invited_Chiang
ABSTRACT We present a review of the development of long-period fiber grating devices for application in optical communication. The recent studies on the realization of long-period gratings in optical
Long period fiber grating-based biosensing: Recent trends and future
Decades have passed since the first demonstration of a long-period fiber grating (LPFG) and its practical application for sensors, and, in this period, manufacturing techniques, sensitivity
Long Period Fibre Gratings
The strain response of a long-period fibre grating arise due to the physical elongation of the fibre, changing the grating pitch and the effective refractive index of the core and cladding due to the
Long-Period Fiber Gratings
As an important passive optical component, long-period fiber gratings (LPFGs) have all the advantages of optical fiber sensors, such as anti-electromagnetic interference, corrosion resistance, high
Mechanically-Induced Long-Period Fiber Gratings Using Laminated Plates
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
Mechanically Induced Long-Period Fiber Gratings and
This paper presents a review of the evolution of LPFGs, with a specific focus on the progression and current trends of mechanically induced
Comparing and analysis of calculation methods of long-period fiber
Abstract Many methods are considered for calculating long-period fiber gratings (LPFGs) transmission spectra such as integral method, formula method and transfer matrix method. In this
Recent progress in design and fabrication of novel long-period fiber
Long-period fiber grating (LPFG) is a kind of wide-range transmission passive photonic device with extensive applications in the field of fiber communication and fiber sensing. In this review, from the
Advances on Mode-Coupling Theories, Fabrication Techniques, and
Abstract:In this paper, we have briefly review the developing history and recent advances made with regard to helical long-period fiber gratings (HLPGs) in three aspects, i.e., the mode-coupling
Long-period fiber grating
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
Theory analysis of mode coupling in tilted long period fiber grating
Abstract The mode coupling in the tilted long period fiber grating (TLPG) is analyzed by using the full vector complex coupled mode theory (FV-CCMT). Compared with the non-tilted LPG,
Mechanically induced long period gratings in different silica multi
Abstract This work presents a thorough comparative investigation of mechanically induced long period gratings (MILPGs) realized in different unconventional multi-layered silica optical fibers:
Long-Period Fiber Gratings for Mode Coupling in Mode-Division
We study the design of such mode scramblers implemented as long-period multimode fiber gratings for systems using D = 12 modes (six spatial modes). By optimizing the grating chirp
Mechanically Induced Long-Period Fiber Gratings and Applications
Long-period fiber gratings (LPFGs) functioning as band-reject filters have played a pivotal role in the realm of optical communication. Since their initial documentation in 1996, LPFGs have
Core-modulated long-period fiber gratings formed by heating and
1. Introduction Recently, long-period fiber gratings (LPFGs) are optical devices that are extensively used in the fields of structural health monitoring, biomonitoring and artificial intelligence
Long-Period Fiber Gratings in Active Fibers
1. Introduction Traditionally, long period fiber gratings (LPG) are made in passive optical fibers that have negligible loss. However, loss or gain that can be controlled via optical pumping adds a new degree
Structure-Modulated Long-Period Fiber Gratings: A
This review synthesizes and categorizes a class of novel long-period fiber gratings (LPFGs) engineered through the modification of the external
Review of Helical Long-Period Fiber Gratings
In this paper, comprehensive remarks are given that focus on the main fabrications and wide applications of helical long-period fiber gratings (HLPGs). Firstly, the techniques of fabricating
Long Period Fibre Gratings
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
Theory and practice of long-period gratings: When a loss becomes a
Our long period fiber gratings are created by the periodic structure of large perturbations in the fiber diameter. These perturbations result in unique spectral response, even in off-resonance
Long-Period Gratings Based on Photonics Crystal Fibers and Their
A long-period fiber grating (LPG) is a one dimension (1D) periodic structure, and is formed by introducing periodic modulation of the refractive index along an optical fiber. Since its period is about 100 to
Few-Mode Fiber-Based Long-Period Fiber Gratings: A Review
Long-period fiber gratings (LPFGs) are efficient ways to achieve high-order core mode conversion and vortex mode conversion in few-mode fibers (FMFs), which have the benefits of
Long Period Gratings in New Generation Optical Fibers
2. Long period gratings: a view back Long Period Gratings are a periodic perturbation of the properties of the optical fiber, generally of the refractive index of the core and/or geometry, in a single mode fiber.
Core-modulated long-period fiber gratings formed by heating and
In this paper, we developed and experimentally evaluated a new type of long-period fiber grating. This structure is fabricated by CO2 laser polishing and subsequent heating with an
Mechanically Induced Long Period Gratings: Recent Progresses
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