Results 11 to 20 of about 778,605 (331)

An Equivalent-Asymmetric Coupling Coefficient DFB Laser With High Output Efficiency and Stable Single Longitudinal Mode Operation

open access: yesIEEE Photonics Journal, 2014
An equivalent-asymmetric coupling coefficient (EACC) distributed feedback laser (DFB) semiconductor laser with equivalent-half apodization grating (EHAG) structure is proposed and experimentally demonstrated for the first time; the EHAG profile is ...
Junshou Zheng   +7 more
doaj   +1 more source

Reconfigurable Millimeter-Wave Components Based on Liquid Crystal Technology for Smart Applications

open access: yesCrystals, 2020
This paper presents recent development of tunable microwave liquid crystal (LC) components in the lower millimeter wave (mmW) regime up to the W-band. With the utilization of increasing frequency, conventional metallic waveguide structures prove to be ...
Ersin Polat   +7 more
doaj   +1 more source

Microwave Photonic Filters and Applications

open access: yesPhotonics, 2023
Microwave photonics is a promising and rapidly developing interdisciplinary field. It combines microwave and photonic techniques to generate, transmit, process, and manipulate microwave signals by using the advantages of broadband, high frequency, and ...
Yi Zhou   +4 more
doaj   +1 more source

500 GHz plasmonic Mach-Zehnder modulator enabling sub-THz microwave photonics [PDF]

open access: yesAPL Photonics, 2018
Broadband electro-optic intensity modulators are essential to convert electrical signals to the optical domain. The growing interest in THz wireless applications demands modulators with frequency responses to the sub-THz range, high power handling and ...
M. Burla   +10 more
semanticscholar   +1 more source

NOVEL PRINCIPLES OF MICROWAVE BAND RADIOELECTRONIC DEVICES DESIGN WITH THE USE OF MICROWAVE PHOTONICS TECHNOLOGY

open access: yesРоссийский технологический журнал, 2016
There are highlighted fundamental and practical advantages referred to introduction of the new interdisciplinary scientific and technological direction, that is, microwave photonics, in modern and perspective radio means of a dual purpose.
M. E. Belkin, S. A. Kudzh, A. S. Sigov
doaj   +1 more source

16-Wavelength DFB Laser Array With High Channel-Spacing Uniformity Based on Equivalent Phase-Shift Technique

open access: yesIEEE Photonics Journal, 2014
The high accuracy of lasing wavelength spacing is one of the key requirements of a distributed feedback (DFB) semiconductor laser array. However, the nonuniformity of the wavelength spacing is increasingly deteriorating with the increase in the channel ...
Yuechun Shi   +5 more
doaj   +1 more source

Non-absorbing high-efficiency counter for itinerant microwave photons [PDF]

open access: yes, 2014
Detecting an itinerant microwave photon with high efficiency is an outstanding problem in microwave photonics and its applications. We present a scheme to detect an itinerant microwave photon in a transmission line via the nonlinearity provided by a ...
Combes, Joshua   +4 more
core   +2 more sources

Reconfigurable integrated structures with functions of Fabry–Perot antenna and wideband liquid absorber for radar system stealth

open access: yesScientific Reports, 2023
This paper proposes a functionally reconfigurable integrated structure of a Fabry–Perot (FP) antenna and wideband liquid absorber. First, a two-layer partial reflecting surface (PRS) has been designed.
Yukun Zou   +4 more
doaj   +1 more source

Theoretical and Experimental Investigations of Tunable Microwave Signal Generation Based on a 1-GHz All-Polarization-Maintaining Mode-Locked Fiber Laser

open access: yesPhotonics, 2022
Photonics-based microwave generation brings the advantages of photonic oscillators, such as high stability, wide bandwidth, and low loss, to the microwave domain.
Denghui Song   +4 more
doaj   +1 more source

Liquid Crystal Based Dielectric Waveguide Phase Shifters for Phased Arrays at W-Band

open access: yesIEEE Access, 2019
In this work, the feasibility of microwave liquid crystal based dielectric waveguide phased shifters is investigated in a phased rod antenna array for the first time.
Roland Reese   +8 more
doaj   +1 more source

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