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   Articles with "frequency conversion" as a keyword



Fiber‐optic sensing scheme based on high‐order Stimulated Brillouin scattering in a fiber ring and frequency down‐conversion

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recommendations! Published in 2020 at "Microwave and Optical Technology Letters"

DOI: 10.1002/mop.32523

Abstract: In this article, a fiber‐optic sensing scheme based on Stimulated Brillouin scattering effect in a recirculating fiber ring and frequency down‐conversion is proposed and experimentally demonstrated. By employing the recirculating fiber ring structure, high‐order backscattering… read more here.

Keywords: frequency; frequency conversion; order; fiber ring ... See more keywords

Mott-Insulator-Superfluid Phase Transition with Coupled-Cavity Frequency Conversion System

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recommendations! Published in 2018 at "International Journal of Theoretical Physics"

DOI: 10.1007/s10773-017-3552-y

Abstract: An array of coupled cavities, each of which contains a triangle-down-level atom, is investigated. An effective Hamiltonian can be achieved under the strong classical driving. We can control the transition between Mott-insulator and superfluid states… read more here.

Keywords: insulator superfluid; transition; mott insulator; frequency conversion ... See more keywords

Frequency conversion, nonlinear absorption and carrier dynamics of GaSe:B/Er crystals

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recommendations! Published in 2017 at "Optical Materials"

DOI: 10.1016/j.optmat.2017.02.007

Abstract: Abstract We aimed to investigate the influence of Er3+ rare earth element on the frequency conversion wavelength in boron doped GaSe crystals. It was found that by substitution of Er3+ with B3+, SHG signal shifted… read more here.

Keywords: gase; frequency conversion; nonlinear absorption; gase crystals ... See more keywords
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Investigation on the performance of ASHP heating system using frequency-conversion technique based on a temperature and hydraulic-balance control strategy

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recommendations! Published in 2020 at "Renewable Energy"

DOI: 10.1016/j.renene.2019.08.130

Abstract: Abstract A temperature and hydraulic-balance control strategy has previously been proven effective for improving the operational performance and achieving significant energy-savings in air source heat pump (ASHP) heating systems. In this study, a frequency-conversion technique… read more here.

Keywords: system; conversion technique; frequency conversion; strategy ... See more keywords

Robust temporal adiabatic passage with perfect frequency conversion between detuned acoustic cavities

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recommendations! Published in 2024 at "Nature Communications"

DOI: 10.1038/s41467-024-45932-6

Abstract: For classical waves, phase matching is vital for enabling efficient energy transfer in many scenarios, such as waveguide coupling and nonlinear optical frequency conversion. Here, we propose a temporal quasi-phase matching method and realize robust… read more here.

Keywords: adiabatic passage; energy transfer; frequency conversion; frequency ... See more keywords

Linear frequency conversion via sudden merging of meta-atoms in time-variant metasurfaces

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recommendations! Published in 2018 at "Nature Photonics"

DOI: 10.1038/s41566-018-0259-4

Abstract: The energy of an electromagnetic wave is converted as the wave passes through a temporal boundary. Thus, effective temporal control of the medium is critical for frequency conversion. Here, we propose rapidly time-variant metasurfaces as… read more here.

Keywords: frequency conversion; frequency; sudden merging; time ... See more keywords

Full 3D modelling of pulse propagation enables efficient nonlinear frequency conversion with low energy laser pulses in a single-element tripler

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recommendations! Published in 2017 at "Scientific Reports"

DOI: 10.1038/srep42889

Abstract: Although new optical materials continue to open up access to more and more wavelength bands where femtosecond laser pulses can be generated, light frequency conversion techniques are still indispensable in filling the gaps on the… read more here.

Keywords: laser; energy laser; conversion; laser pulses ... See more keywords

Particle-in-cell simulation for frequency up-conversion of microwave pulse in a rapidly created plasma

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recommendations! Published in 2017 at "Physics of Plasmas"

DOI: 10.1063/1.4978292

Abstract: Microwave pulse propagation through a rapidly created plasma and frequency up-conversion has been demonstrated by the particle-in-cell (PIC) method. Compared with the finite-difference time-domain method in which the time-varying plasma is simplified as a dielectric… read more here.

Keywords: created plasma; conversion; frequency conversion; microwave pulse ... See more keywords

Particle-in-cell simulation for frequency up-conversion of microwave to terahertz radiation by a relativistic hollow ionization front

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recommendations! Published in 2019 at "AIP Advances"

DOI: 10.1063/1.5122790

Abstract: The interaction of an electromagnetic wave with a relativistic ionization front with frequency up-conversion has been demonstrated by the particle-in-cell (PIC) method. In the PIC simulation, the plasma ionization front is formed by using an… read more here.

Keywords: ionization front; pic; frequency conversion; ionization ... See more keywords

High performance photonic microwave frequency down-conversion using a dual-drive dual-parallel Mach-Zehnder modulator

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recommendations! Published in 2019 at "Journal of Modern Optics"

DOI: 10.1080/09500340.2018.1512677

Abstract: ABSTRACT Photonic microwave frequency down-conversion based on carrier suppression single sideband (CS-SSB) modulation via an integrated dual-drive dual-parallel Mach-Zehnder modulator (DP-MZM) is proposed. The MZM on the up path of the DP-MZM is used to… read more here.

Keywords: photonic microwave; microwave frequency; frequency; frequency conversion ... See more keywords

Controllable location-dependent frequency conversion based on space-time transformation optics

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recommendations! Published in 2024 at "Journal of Physics D: Applied Physics"

DOI: 10.1088/1361-6463/ad6d7b

Abstract: Electromagnetic wave frequency conversion is a fundamental technique in telecommunications, especially the conversion from a single-frequency source to a multi-frequency output or a continuous spectra spread throughout space or time. By linking the differential intervals… read more here.

Keywords: space; optics; space time; frequency conversion ... See more keywords