Results 11 to 20 of about 42,810 (293)

Review of Experimental Verification Methods of Gyrotron Quasi-optical Mode Converters

open access: yesJournal of Telecommunications and Information Technology, 2020
This survey presents a review of experimental methods relied upon while implementing gyrotron higher mode generation techniques and performing near electromagnetic field measurements in launcher and quasi-optical mode converters. In particular, the paper
Grzegorz Jaworski   +3 more
doaj   +1 more source

The reduction of the thermal quenching effect in laser-excited phosphor converters using highly thermally conductive hBN particles

open access: yesScientific Reports, 2021
Phosphor converters for solid state lighting applications experience a strong thermal stress under high-excitation power densities. The recent interest in laser diode based lighting has made this issue even more severe.
Akvilė Zabiliūtė-Karaliūnė   +2 more
doaj   +1 more source

Pulse distortion caused by waveguide inhomogeneity in nonlinear optical wavelength converters

open access: yesScientific Reports, 2023
Low-noise integrated all-optical wavelength converters that can be operated in short pulse regime are essential tools to overcome contention resolution in a modern communication network, based on wavelength division multiplexing.
Danial Paygan   +3 more
doaj   +1 more source

Semiconductor optical amplifiers: performance and applications in optical packet switching [Invited] [PDF]

open access: yes, 2004
Semiconductor optical amplifiers (SOAs) are a versatile core technology and the basis for the implementation of a number of key functionalities central to the evolution of highly wavelength-agile all-optical networks.
Andonovic, I.   +2 more
core   +2 more sources

Quasi-optical mode converter for a high power TE8,3-mode gyrotron

open access: yesAIP Advances, 2022
We successfully developed a Gyrotron HS-III (28-GHz/400-kW/5-s) for electron cyclotron resonance heating in a spherical tokamak EXL-50, which operated in the TE8,3 mode. An internal quasi-optical-mode converter was designed to separate the spent electron beam from the outgoing power and convert the operating mode to a fundamental Gaussian wave beam ...
Qili Huang   +10 more
openaire   +2 more sources

Optically Enabled ADCs and Application to Optical Communications

open access: yesIEEE Open Journal of the Solid-State Circuits Society, 2021
Electrical-optical signal processing has been shown to be a promising path to overcome the limitations of state-of-the-art all-electrical data converters. In addition to ultra-broadband signal processing, it allows leveraging ultra-low jitter mode-locked
Andrea Zazzi   +14 more
doaj   +1 more source

Cascaded wavelength conversion by four-wave mixing in a strained semiconductor optical amplifier at 10 Gb/s [PDF]

open access: yes, 1997
We demonstrate for the first time cascaded wavelength conversion by four-wave mixing in a semiconductor optical amplifier. Bit-error-rate performance of
Geraghty, David F.   +5 more
core   +1 more source

Optical pulse compression based on nonlinear silicon waveguides and chirped Bragg gratings [PDF]

open access: yesJournal of Electrical and Computer Engineering Innovations, 2017
Due to the growing demand for higher bandwidth, employing optical devices instead of electronic devices in data transmission systems has attracted much attention in recent years.
A. Ahmadipour, H. Tezkhan, H. Soofi
doaj   +1 more source

Wavelength conversion for WDM communication systems using four-wavemixing in semiconductor optical amplifiers [PDF]

open access: yes, 1997
Four-wave mixing (FWM) in semiconductor optical amplifiers is an attractive mechanism for wavelength conversion in wavelength-division multiplexed (WDM) systems since it provides modulation format and bit rate transparency over wide tuning ranges.
Geraghty, David F.   +5 more
core   +1 more source

Development of a Modular Educational Kit for Research and Teaching on Power Electronics and Multilevel Converters

open access: yesIEEE Access, 2021
This paper presents the detailed project of a modular educational kit to be used in research and teaching activities in the area of power electronics - with emphasis on applications in medium voltage multilevel converters.
Wilson C. Sant'Ana   +9 more
doaj   +1 more source

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