Blar i Fakultet for informasjonsteknologi og elektroteknikk (IE) på tidsskrift "Optics Express"
Viser treff 21-35 av 35
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Multispectral camera as spatio-spectrophotometer under uncontrolled illumination
(Journal article; Peer reviewed, 2019)Multispectral constancy enables the illuminant invariant representation of multi-spectral data. This article proposes an experimental investigation of multispectral constancy through the use of multispectral camera as a ... -
Network layer packet redundancy in optical packet switched networks
(Journal article; Peer reviewed, 2004)A crucial issue in optical packet switched (OPS) networks is packet losses at the network layer caused by contentions. This paper presents the network layer packet redundancy scheme (NLPRS), which is a novel approach to ... -
On-chip mid-infrared optical sensing with GeSbSe waveguides and resonators
(Journal article; Peer reviewed, 2023)We fabricated single mode Ge28Sb12Se60 waveguides and resonators using e-beam lithography and achieved a propagation loss of 3.88 dB/cm at 3.66 µm. We compared BCl3 and CHF3 etch chemistries and determined CHF3 produced ... -
Optical parametric master oscillator and power amplifier for efficient conversion of high-energy pulses with high beam quality
(Journal article; Peer reviewed, 2004)We describe a system for parametric conversion of high-energy, Q-switched laser pulses from 1.064 µm to 2.1 µm in KTiOPO4. High beam quality and efficiency are obtained by use of a two-stage system: An optical parametric ... -
Optimized light source spectral power distribution for RGB camera based spectral reflectance recovery
(Peer reviewed; Journal article, 2021)The accuracy of recovered spectra from camera responses mainly depends on the spectral estimation algorithm used, the camera and filters selected, and the light source used to illuminate the object. We present and compare ... -
Performance modelling of optical packet switched networks with the Engset traffic model
(Journal article; Peer reviewed, 2005)Stochastic processes have been widely employed in order to assess the network layer performance of Optical Packet Switched (OPS) networks. In this paper we consider how the Engset traffic model may be applied to evaluate ... -
Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application
(Peer reviewed; Journal article, 2012)A sensor designed to detect bio-molecules is presented. The sensor exploits a planar 2D photonic crystal (PC) membrane with sub-micron thickness and through holes, to induce high optical fields that allow detection of ... -
Simulations and realizations of active right-handed metamaterials with negative refractive index
(Journal article; Peer reviewed, 2007)The theory of determining the sign of the refractive index in active materials is discussed. Animations of numerical simulations are presented, supporting the claim that negative refractive index may occur in right-handed ... -
Spectral shaping of ring resonator transmission response
(Peer reviewed; Journal article, 2021)We present a Mach-Zehnder interferometer assisted ring resonator configuration (MARC) to realize resonator transmission spectra with unique spectral signatures and significantly large effective free spectral ranges. ... -
Spectrogenic imaging: A novel approach to multispectral imaging in an uncontrolled environment
(Journal article; Peer reviewed, 2014)Increasing the number of imaging channels beyond the conventional three has been shown to be beneficial for a wide range of applications. However, it is mostly limited to imaging in a controlled environment, where the ... -
Spectrogenic imaging: A novel approach to multispectral imaging in an uncontrolled environment
(Journal article, 2014)Increasing the number of imaging channels beyond the conventional three has been shown to be beneficial for a wide range of applications. However, it is mostly limited to imaging in a controlled environment, where the ... -
Total internal reflection and evanescent gain
(Journal article; Peer reviewed, 2011)Total internal reflection occurs for large angles of incidence, when light is incident from a high-refractive-index medium onto a low-index medium. We consider the situation where the low-index medium is active. By invoking ... -
Waveguide asymmetric long-period grating couplers as refractive index sensors
(Peer reviewed; Journal article, 2020)A highly sensitive integrated photonic transducer is designed by utilizing asymmetric long-period gratings on a silicon waveguide. These gratings are formed by periodic perturbation of the waveguide width, leading to ... -
Wide frequency range measurements of absolute phase and amplitude of vibrations in micro- and nanostructures by optical interferometry
(Journal article; Peer reviewed, 2007)A heterodyne interferometer has been built in order to characterize vibrations on micro- and nanostructures. The interferometer offers the possibility of both absolute phase and high resolution absolute amplitude vibrational ... -
ZCAM, a colour appearance model based on a high dynamic range uniform colour space
(Journal article; Peer reviewed, 2021)