Blar i NTNU Open på tidsskrift "Optics Express"
Viser treff 1-20 av 69
-
A sensor-data-based denoising framework for hyperspectral images
(Journal article; Peer reviewed, 2015)Many denoising approaches extend image processing to a hyperspectral cube structure, but do not take into account a sensor model nor the format of the recording. We propose a denoising framework for hyperspectral images ... -
Accurate non-linear calculation model for decoupling thermal and mechanical loading effects in the OBR measurements
(Peer reviewed; Journal article, 2021)Fiber optic sensors are increasingly used in several fast-growing industries. Aerospace, energy storage, and the medical sector consider new implementations of optical fibers mainly for condition monitoring purposes. ... -
Acoustooptic characterization of a birefringent two-mode photonic crystal fiber
(Journal article; Peer reviewed, 2006)The effect of axial variations in acoustooptic phase-mismatch coefficient of a two-mode birefringent photonic crystal fiber (PCF) is studied experimentally using two different methods. The first method is to determine axial ... -
Advanced solid-state lasers 2019: Focus issue introduction
(Journal article; Peer reviewed, 2020) -
All-optical high-speed modulation of THz transmission through silicon core optical fibers
(Journal article; Peer reviewed, 2021)High speed optical modulation of THz radiation is of interest for information processing and communications applications. In this paper infrared femtosecond pulses are used to generate free carriers that reduce the THz ... -
Angular dependence of fluorescence from turbid media
(Journal article; Peer reviewed, 2015)We perform Monte Carlo light scattering simulations to study the angular distribution of the fluorescence emission from turbid media and compare the results to measured angular distributions from fluorescing white paper ... -
Anisotropic plasmonic Cu nanoparticles in sol-gel oxide nanopillars studied by spectroscopic Mueller matrix ellipsometry
(Journal article; Peer reviewed, 2013)Broadened plasmon resonances of Cu nanoparticles in nanopatterned mixed oxide sol-gel nanopillars are shown to be readily detected by spectroscopic Mueller matrix ellipsometry. The plasmonic nanomaterials are obtained by ... -
Atmospheric dispersion management in mid-IR mode-locked oscillators
(Peer reviewed; Journal article, 2023)The atmospheric dispersion in the mid-infrared transparency windows presents an important albeit often neglected factor when developing ultrashort-pulsed lasers. We show that it can amount to hundreds of fs2 in 2–3 µm ... -
Chaotic chirped-pulse oscillators
(Journal article; Peer reviewed, 2013)We present results of experimental investigation of the chaotic and quasi-periodic regime in the chirped-pulsed (dissipative soliton) Cr:ZnS and Cr:ZnSe mid-IR oscillators with significant third-order dispersion. The ... -
Characterisation of the n-colour printing process using the spot colour overprint model
(Journal article; Peer reviewed, 2014)This paper is aimed at reproducing the solid spot colours using the n-colour separation. A simplified numerical method, called as the spot colour overprint (SCOP) model, was used for characterising the n-colour printing ... -
Chirped dissipative soliton absorption spectroscopy
(Journal article; Peer reviewed, 2011)We present analytical theory of dissipative soliton absorption spectroscopy. A dissipative soliton formed in an all-normal-dispersion oscillator with a narrowband intracavity absorber acquires spectral features that follow ... -
Coherent octave-spanning mid-infrared supercontinuum generated in As2S3-silica double-nanospike waveguide pumped by femtosecond Cr:ZnS laser
(Journal article; Peer reviewed, 2016)A more than 1.5 octave-spanning mid-infrared supercontinuum (1.2 to 3.6 μm) is generated by pumping a As2S3-silica “double-nanospike” waveguide via a femtosecond Cr:ZnS laser at 2.35 μm. The combination of the optimized ... -
Controlling an actively-quenched single photon detector with bright light
(Journal article; Peer reviewed, 2011)We control using bright light an actively-quenched avalanche single-photon detector. Actively-quenched detectors are commonly used for quantum key distribution (QKD) in the visible and near-infrared range. This study shows ... -
Deep learning models for optically characterizing 3D printers
(Peer reviewed; Journal article, 2021)Multi-material 3D printers are able to create material arrangements possessing various optical properties. To reproduce these properties, an optical printer model that accurately predicts optical properties from the printer’s ... -
Degree of polarization of light scattered from correlated surface and bulk disorders
(Journal article; Peer reviewed, 2023)Using a single scattering theory, we derive the expression of the degree of polarization of the light scattered from a layer exhibiting both surface and volume scattering. The expression puts forward the intimate connection ... -
Detection of single nano-defects in photonic crystals between crossed polarizers
(Peer reviewed; Journal article, 2013)We investigate, by simulations and experiments, the light scattering of small particles trapped in photonic crystal membranes supporting guided resonance modes. Our results show that, due to amplified Rayleigh small particle ... -
Dispersion of polarization coupling, localized and collective plasmon modes in a metallic photonic crystal mapped by Mueller Matrix Ellipsometry
(Journal article; Peer reviewed, 2015)We report a spectroscopic Mueller matrix experimental study of a plasmonic photonic crystal consisting of gold hemispheroidal particles (lateral radius 54 nm, height 25 nm) arranged on a square lattice (lattice constant ... -
Do it yourself hyperspectral imager for handheld to airborne operations
(Journal article; Peer reviewed, 2018)This study describes rapid prototype construction of small and lightweight push broom Hyper Spectral Imagers (HSI). The dispersive element housings are printed by a thermoplastic 3D printer combined with S-mount optical ... -
Effects of bursty traffic in service differentiated Optical Packet Switched networks
(Journal article; Peer reviewed, 2004)Service differentiation is a crucial issue in the next-generation Optical Packet Switched networks. In this paper we examine how bursty traffic influences the performance of a service differentiated Optical Packet Switched ... -
Effects of optical activity to Mueller matrix ellipsometry of composed waveplates
(Journal article; Peer reviewed, 2021)