Signatures of Bardasis-Schrieffer mode excitation in third-harmonic generated currents

For resolving the problem that power filter cannot work normally because TCR (thyristor controlled reactor) generates extra third harmonic current under asymmetrical voltage, the paper proposes the estimation method of current capacity that TCR generates extra third harmonic current under asymmetrical voltage. Considering extra third harmonic current under asymmetrical voltage, Optimum method based on genetic algorithm is used to design the parameters of power filter. With reactive power compensation and harmonic suppression project of a steel mill as example, the proposed method is simulated by Matlab. Simulation results show optimized power filter can eliminate extra third harmonic current effects under asymmetrical voltage, meet the requirement of reactive power compensation, reduce harmonics current that load injects into system, and guarantee the power filter safe operation under asymmetrical voltage.

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Cavity-mode excitation in a Josephson tunnel junction

Physical Review B ◽

10.1103/physrevb.22.2392 ◽

1980 ◽

Vol 22 (5) ◽

pp. 2392-2395 ◽

Cited By ~ 14

Author(s):

Jhy-Jiun Chang ◽

J. T. Chen

Keyword(s):

Tunnel Junction ◽

Cavity Mode ◽

Mode Excitation ◽

Josephson Tunnel

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Selective normal mode excitation in multilayer thin film bulk acoustic wave resonators

Applied Physics Letters ◽

10.1063/1.4899067 ◽

2014 ◽

Vol 105 (16) ◽

pp. 162910 ◽

Cited By ~ 3

Author(s):

Andrey Kozyrev ◽

Anatoly Mikhailov ◽

Sergey Ptashnik ◽

Peter K. Petrov ◽

Neil Alford

Keyword(s):

Thin Film ◽

Acoustic Wave ◽

Normal Mode ◽

Bulk Acoustic Wave ◽

Multilayer Thin Film ◽

Mode Excitation ◽

Film Bulk ◽

Acoustic Wave Resonators ◽

Bulk Acoustic Wave Resonators

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Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽

10.3390/ma14123194 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3194

Author(s):

Adrian Petris ◽

Petronela Gheorghe ◽

Tudor Braniste ◽

Ion Tiginyanu

Keyword(s):

Harmonic Generation ◽

Nonlinear Optical ◽

Laser Pulses ◽

Third Harmonic Generation ◽

High Repetition Rate ◽

Third Order ◽

Third Harmonic ◽

The Third ◽

High Repetition ◽

Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

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