Results 41 to 50 of about 120,889 (204)
Curvature prediction of long‐period fibre grating based on random forest regression
IET Optoelectronics, 2022 This study proposes a long‐period fibre grating (LPFG) curvature estimation method based on random forest regression (RFR) to address the shortcomings of the existing curvature evaluation method, namely, polynomial fitting; these shortcomings cause ...
Xingliu Hu +3 more
doaj +1 more source
Graphene oxide coated long period grating based fibre optic humidity sensor [PDF]
, 2017 In this paper, the response of a graphene oxide (GO) coated long period grating (LPG) to the change in temperature and in humidity is reported. To create the probe, an improved Hummer's method was used to synthesis the GO solution used as its basis ...
Dissanayake, K. P. W. +4 more
core +1 more source
Long Period Gratings Formed in Depressed Cladding Fibres [PDF]
Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals, 1997 There has been a significant interest in long period gratings, primarily due to their applications in gain-flattened erbium doped fibre amplifiers [1]. Up till now, cladding modes supported by the glass-air interface of an optical fibre have been used in a forward mode coupling scheme involving also the guided fundamental mode of the optical fibre ...
Dong, L., Reekie, L., Cruz, J.L.
openaire +4 more sources
Angularly Cascaded Long-Period Fiber Grating for Curvature and Temperature Detection
Sensors, 2023 A high-sensitivity curvature sensor with dual-parameter measurement ability based on angularly cascaded long-period fiber grating (AC-LPFG) is proposed and experimentally demonstrated, which consists of two titled LPFGs (TLPFGs) with different tilt ...
Anping Xiao +9 more
doaj +1 more source
Photochemical long-period grating fabrication in pure-fused-silica photonic crystal fiber
, 2007 We report on first photochemical recording of a long-period fiber grating (LPFG) in a pure fused silica photonic crystal fiber (PCF), which is based on two-photon absorption (TPA) of high-intensity femtosecond 264 nm pulses.
Brambilla, G. +3 more
core +1 more source
Transmission Properties of Metallic Grating with Subwavelength Slits in THz Frequency Region
Active and Passive Electronic Components, 2007 This paper presents a fully experimental and theoretical study on transmission properties of a deep metallic grating with subwavelength slits in THz frequency region by using THz time domain spectroscopy (THz-TDS).
Dong Liang +9 more
doaj +1 more source
Results in Physics, 2019 We study on the nonlinear tunneling effect of snakelike self-similar waves of the nonlinear Schrödinger equation with gains in an asymmetric dual-core waveguide amplifier with a long-period grating.
Jun-Rong He, Si-Liu Xu, Li Xue
doaj +1 more source
Use of Dynamical Undulator Mechanism to Produce Short Wavelength Radiation in Volume FEL (VFEL)
, 2002 VFEL lasing in system with dynamical undulator is described. In this system radiation of long wavelength creates the undulator for lasing on shorter wavelength. Two diffraction gratings with different spatial periods form VFEL resonator. The grating with
Baryshevsky +5 more
core +1 more source
Calculation of optical-waveguide grating characteristics using Green's functions and the Dyson's equation [PDF]
, 2006 We present a method for calculating the transmission spectra, dispersion, and time delay characteristics of optical-waveguide gratings based on Green's functions and Dyson's equation.
Mortensen, Niels Asger, Rindorf, Lars
core +2 more sources
Sensors, 2010 This paper presents the feasibility of utilizing fiber Bragg grating (FBG) and long-period fiber grating (LPFG) sensors for nondestructive evaluation (NDE) of infrastructures using Portland cement concretes and asphalt mixtures for temperature, strain ...
Jian-Neng Wang, Jaw-Luen Tang
doaj +1 more source