Results 11 to 20 of about 729 (216)

Cellulose‐Based Radiative Cooling and Solar Heating Powers Ionic Thermoelectrics

open access: yesAdvanced Science, 2023
Cellulose opens for sustainable materials suitable for radiative cooling thanks to inherent high thermal emissivity combined with low solar absorptance. When desired, solar absorptance can be introduced by additives such as carbon black.
Mingna Liao   +8 more
doaj   +1 more source

Editorial for the Special Issue on Optical MEMS

open access: yesMicromachines, 2019
Optical micro-electro-mechanical systems (MEMS), micro-opto-electro-mechanical systems (MOEMS), or optical microsystems are devices or systems that interact with light through actuation or sensing at a micron or millimeter scale [...]
Huikai Xie, Frederic Zamkotsian
doaj   +1 more source

Exploring a Band-Edge Bragg Grating Modulator on a Hybrid Thin-Film Lithium Niobate Platform

open access: yesIEEE Photonics Journal, 2021
In this work, we design, model, and characterize the Bragg grating modulator (BGM) on silicon-rich nitride and thin-film lithium niobate (SRN-TFLN) platform.
Xingrui Huang   +5 more
doaj   +1 more source

Shape recognition using orientational and morphological scale‐spaces of curvatures

open access: yesIET Computer Vision, 2015
In this study, a scale‐invariant representation for closed planar curves (silhouettes) is proposed. The orientations of all points within the Gaussian scale‐space of the curve are extracted.
Erdem Akagündüz
doaj   +1 more source

Improvement of Overlap for 2x2 MZI Electro-Optic Switch Based on Lithium Tantalite (LiTaO3)

open access: yesمجلة النهرين للعلوم الهندسية, 2022
This research introduces a method of an electro-optic effect and electro-refractive effect that considers very imperative for high-speed optical communication systems.
Sadeq Adnan Hbeeb
doaj   +1 more source

Advanced Electrode Design for Low-Voltage High-Speed Thin-Film Lithium Niobate Modulators

open access: yesIEEE Photonics Journal, 2021
In this paper, we present a novel transmission line architecture in thin-film lithium niobate (TFLN) platforms to improve the velocity match between the microwave and the optical wave.
Xingrui Huang   +6 more
doaj   +1 more source

Performance Evaluation of Optical-Beam Stabilization Platforms With Different Supports Used in Large-Aperture Electro-Optical System

open access: yesIEEE Photonics Journal, 2022
Optical-beam stabilization platform (OBSP) provides high-precision inertial reference for measurement of full link optical-beam jitter in large-aperture electro-optical systems.
Yutang Wang   +5 more
doaj   +1 more source

Modulator structures for radio-on-fiber applications

open access: yesJournal of Telecommunications and Information Technology, 2003
Traditional electro-optic modulators are not optimized for bandpass applications such as radio-on-fiber delivery systems due to their limited electro-optic response.
Sean Victor Hum   +2 more
doaj   +1 more source

An analysis of the 2016 Hitomi breakup event

open access: yesEarth, Planets and Space, 2017
The breakup of Hitomi (ASTRO-H) on 26 March 2016 is analysed. Debris from the fragmentation is used to estimate the time of the event by propagating backwards and estimating the close approach with the parent object.
Sven Flegel   +4 more
doaj   +1 more source

Spectrally Fragmented Electrical Dispersion Compensation for High-Speed Microstrip Traces in Data Centers Connections

open access: yesIEEE Photonics Journal, 2016
The frequency-dependent dispersion impairment of high-speed printed analog traces in next-generation pluggable modules is studied. This frequency dependence is considered for the first time in optical fiber communication systems.
Yanir London, Dan Sadot
doaj   +1 more source

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