Results 31 to 40 of about 101,437 (150)

An Extremely Low Noise-Equivalent Power Photoreceiver Using High-Gain InGaAs/AlGaAsSb APDs

Journal of Lightwave Technology
J Taylor-Mew, Benjamin White, Jo Shien Ng   +2 more
exaly   +3 more sources

International System of Units (SI) Traceable Noise-Equivalent Power and Responsivity Characterization of Continuous Wave ErAs:InGaAs Photoconductive Terahertz Detectors

Photonics, 2019
A theoretical model for the responsivity and noise-equivalent power (NEP) of photoconductive antennas (PCAs) as coherent, homodyne THz detectors is presented.
Anuar de Jesus Fernandez Olvera, Axel Roggenbuck, Katja Dutzi, Nico Vieweg, Hong Lu, Arthur C. Gossard, Sascha Preu   +6 more
doaj   +1 more source

Spherical and Aspherical Lenses for Boosting the Performance of Terahertz Imaging Systems

Advanced Photonics Research
A comprehensive study on the enhancement of terahertz (THz) detection through the terajet effect is performed using mesoscale dielectric lenses of different shapes and sizes.
El Hadj Abidi, Jaime Calvo‐Gallego, Alejandro Schulman, Miguel Ferrando‐Bataller, Oleg V. Minin, Igor V. Minin, Jesus E. Velázquez‐Pérez, Yahya Moubarak Meziani   +7 more
doaj   +1 more source

Theoretical Investigation of Near-Infrared Fabry–Pérot Microcavity Graphene/Silicon Schottky Photodetectors Based on Double Silicon on Insulator Substrates

Micromachines, 2020
In this work a new concept of silicon resonant cavity enhanced photodetector working at 1550 nm has been theoretically investigated. The absorption mechanism is based on the internal photoemission effect through a graphene/silicon Schottky junction ...
Maurizio Casalino
doaj   +1 more source

Electromagnetic Noise Calculation of Permanent Magnet Synchronous Motor Fed by Inverter

机车电传动, 2019
A method for calculating electromagnetic noise of permanent magnet synchronous motor (PMSM) was presented. The electromagnetic force wave in air gap was simulated by 2D electromagnetic field finite element method.
Jun PENG, Weiye LI, Jianghua FENG, Zhichu CHEN   +3 more
doaj  

Investigation of occupational noise annoyance in a wind turbine power plant

Journal of Low Frequency Noise, Vibration and Active Control, 2019
Noise, emitted by wind turbines, is one of the main health risk factors which has been recently considered in many researches. Noise annoyance is among the most important human responses to noise.
Mohammad R Monazzam, Seyed A Zakerian, Zeinab Kazemi, Mohammad H Ebrahimi, Maryam Ghaljahi, Ahmad Mehri, Farzaneh Afkhaminia, Milad Abbasi   +7 more
doaj   +1 more source

Zero-biased graphene photodetector with high responsivity integrated into silicon microring resonator

Scientific Reports
This study presents a dual-core graphene-based waveguide photodetector integrated into a silicon microring resonator to achieve enhanced responsivity.
Hadi Hashemnezhad, Mina Noori
doaj   +1 more source

High resolution capacitance detection circuit for rotor micro-gyroscope

AIP Advances, 2014
Conventional methods for rotor position detection of micro-gyroscopes include common exciting electrodes (single frequency) and common sensing electrodes (frequency multiplex), but they have encountered some problems.
Ming-Yuan Ren, Hai-Feng Zhang, Xiao-Wei Liu, Zhi-Gang Mao   +3 more
doaj   +1 more source

LSTM-Based Estimation of Harmonic Source Equivalent Parameters in Power Systems

IEEE Access
This paper proposes a deep learning-based method to estimate equivalent parameters of harmonic sources, thus improving the reliability of harmonic contribution assessment.
Jong-Il Park, Dohan Kim, Chang-Hyun Park
doaj   +1 more source

On the Possibility of Breaking the Heterodyne Detection Quantum Noise Limit With Cross-Correlation

IEEE Access, 2018
The cross-correlation sensitivity of two identical balanced photodiode heterodyne receivers is characterized. Both the balanced photodiodes receive the same weak signal split up equally, a situation equivalent to an astronomical spatial interferometer. A
Ernest A. Michael, Felipe E. Besser
doaj   +1 more source