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Fabrication of Fiber Bragg Gratings by Visible Femtosecond Laser for Multi-kW Fiber Oscillator

open access: yesIEEE Photonics Journal, 2022
In this paper, we fabricate a pair of fiber Bragg gratings (FBGs) in large mode area double cladding fiber (LMA-DCF, core/inner cladding diameter: 20/400 μm) by visible (515 nm) femtosecond laser and phase mask for the first time to ...
Hongye Li   +9 more
doaj   +1 more source

High-Frequency Oscillatory Ventilation as a Rescue Mode for Refractory Hypercarbia in Children

open access: yesTokyo Women's Medical University Journal, 2022
High-frequency oscillatory ventilation (HFOV) use in the airway obstructive status can be relatively contraindicated by the risk of air trapping leading to hemodynamic compromise.
Mai Miyaji   +4 more
doaj   +1 more source

SOLID-STATE COMPONENTS AND DEVICES OF TERAHERTZ ELECTRONIC TECHNOLOGY IN UKRAINE [PDF]

open access: yesРадиофизика и электроника, 2018
Subject and purpose. One of the main problems arising in the implementation of the terahertz range is associated with the need to provide the advanced equipment developed in this frequency band with effective electronic components.
N. F. Karushkin
doaj   +1 more source

Three-Dimensional, Time-Dependent Analysis of High- and Low-Q Free-Electron Laser Oscillators

open access: yesApplied Sciences, 2021
Free-electron lasers (FELs) have been designed to operate over virtually the entire electromagnetic spectrum, from microwaves through to X-rays, and in a variety of configurations, including amplifiers and oscillators. Oscillators can operate in both the
Peter J. M. van der Slot   +1 more
doaj   +1 more source

Demonstration of Three True Random Number Generator Circuits Using Memristor Created Entropy and Commercial Off-the-Shelf Components

open access: yesEntropy, 2021
In this work, we build and test three memristor-based true random number generator (TRNG) circuits: two previously presented in the literature and one which is our own design.
Scott Stoller, Kristy A. Campbell
doaj   +1 more source

TERAHERTZ CLYNOOROTRON WITH AN AZIMUTHAL COMB [PDF]

open access: yesРадиофизика и электроника, 2017
The results of theoretical and experimental studies of oro-trons – oscillators of diffraction radiation with spatially developed electrodynamic systems, electromagnetic oscillations in which are excited, as a rule, by nonrelativistic spatially developed ...
V. D. Yeryomka   +3 more
doaj   +1 more source

Gravity-Compensation Design Approaches for Flexure-Pivot Time Bases

open access: yesMachines, 2022
While flexure time bases have gained significant traction in the watchmaking industry thanks to their high quality factor and monolithic design, maintaining a stable frequency in varying orientations of wrist watches with respect to gravity remains a ...
Etienne Thalmann   +2 more
doaj   +1 more source

Oscillator-Inspired Dynamical Systems to Solve Boolean Satisfiability

open access: yesIEEE Journal on Exploratory Solid-State Computational Devices and Circuits, 2023
Dynamical systems can offer a novel non-Boolean approach to computing. Specifically, the natural minimization of energy in the system is a valuable property for minimizing the objective functions of combinatorial optimization problems, many of which are ...
Mohammad Khairul Bashar   +2 more
doaj   +1 more source

TERAHERTZ OSCILLATIONS IN InN GUNN DIODES WITH AN ACTIVE REGION LENGTH OF 1 μm AND WITH A GRADED GaInN LAYER [PDF]

open access: yesRadio Physics and Radio Astronomy, 2022
Subject and Purpose. The InN Gunn diode is known as the device capable of generating powerful oscillations atfrequencies above 300 GHz. A possible way for increasing both the microwave power and the cutoff frequency of the Gunn diode is to employ graded ...
I. P. Storozhenko, S. I. Sanin
doaj   +1 more source

Concepts and Key Technologies of Microelectromechanical Systems Resonators

open access: yesMicromachines, 2022
In this paper, the basic concepts of the equivalent model, vibration modes, and conduction mechanisms of MEMS resonators are described. By reviewing the existing representative results, the performance parameters and key technologies, such as quality ...
Tianren Feng   +4 more
doaj   +1 more source

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