Wide-frequency tunable bandpass filter with high-frequency selectivity
Sign Up to like & getrecommendations! Published in 2019 at "Electromagnetics"
DOI: 10.1080/02726343.2019.1641657
Abstract: ABSTRACT Based on the coupling-compensating technologies, a wide-frequency tunable bandpass filter with high-frequency selectivity has been presented in this paper. The coupling coefficient between a pair of resonator and the external quality can be easily… read more here.
Keywords: tunable bandpass; frequency; filter; wide frequency ... See more keywords
Wide Frequency Tuning of Continuous Terahertz Wave Generated by Difference Frequency Mixing under Exciton-Excitation Conditions in a GaAs / AlAs Multiple Quantum Well
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.10.044035
Abstract: Continuous terahertz wave sources with narrow bandwidth and wide frequency tunability enable high-resolution terahertz spectroscopy and high-speed information communication. In this study, using the optical nonlinearity of excitons as the source of second-order nonlinear polarization,… read more here.
Keywords: frequency; multiple quantum; wide frequency; excitation ... See more keywords
Flexible ultra-wide frequency microwave down-conversion based on re-circulating four-wave mixing in a semiconductor optical amplifier.
Sign Up to like & getrecommendations! Published in 2020 at "Optics express"
DOI: 10.1364/oe.393382
Abstract: A flexible ultra-wide frequency photonic-assisted method is proposed for microwave harmonic down-conversion based on re-circulating four-wave mixing (RFWM) in a semiconductor optical amplifier (SOA). The proposed down-converter consists of a RF-driven electro-optic modulator (EOM) and… read more here.
Keywords: ultra wide; conversion based; frequency; conversion ... See more keywords
Investigation of Mechanical and Damping Performances of Cylindrical Viscoelastic Dampers in Wide Frequency Range
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DOI: 10.3390/act10040071
Abstract: This paper aims to develop viscoelastic dampers, which can effectively suppress vibration in a wide frequency range. First, several viscoelastic materials for damping performance were selected, and different batches of cylindrical viscoelastic dampers were fabricated… read more here.
Keywords: viscoelastic dampers; cylindrical viscoelastic; wide frequency; frequency range ... See more keywords