Topic
Parametric oscillator
About: Parametric oscillator is a research topic. Over the lifetime, 5836 publications have been published within this topic receiving 95631 citations. The topic is also known as: Parametric excitation.
Papers published on a yearly basis
Papers
More filters
Posted Content•
TL;DR: In this paper, a traveling wave parametric amplifiers (TWPAs) were used for superconducting device physics due to their high gain and quantum-limited noise, achieving an average gain of 12 dB across a 4 GHz span, along with an average saturation power of -92 dBm with noise approaching the quantum limit.
Abstract: Josephson parametric amplifiers have become a critical tool in superconducting device physics due to their high gain and quantum-limited noise. Traveling wave parametric amplifiers (TWPAs) promise similar noise performance while allowing for significant increases in both bandwidth and dynamic range. We present a TWPA device based on an LC-ladder transmission line of Josephson junctions and parallel plate capacitors using low-loss amorphous silicon dielectric. Crucially, we have inserted $\lambda/4$ resonators at regular intervals along the transmission line in order to maintain the phase matching condition between pump, signal, and idler and increase gain. We achieve an average gain of 12\,dB across a 4\,GHz span, along with an average saturation power of -92\,dBm with noise approaching the quantum limit.
35 citations
TL;DR: The behavior of a Josephson flux-flow oscillator in the presence of both bias current and magnetic field fluctuations has been studied in this article, where the Poincare method has been used to derive the equation for slow phase dynamics in the limit of small noise intensity.
Abstract: The behavior of a Josephson flux-flow oscillator in the presence of both bias current and magnetic field fluctuations has been studied. To derive the equation for slow phase dynamics in the limit of small noise intensity the Poincare method has been used. Both the form of spectral line and the linewidth of the flux-flow oscillator have been derived analytically on the basis of known frequency modulation theory technique, known limiting cases are considered, limits of their applicability are discussed and appearance of excess noise is explained. Good coincidence of theoretical description with experimental results has been demonstrated.
34 citations
TL;DR: In this paper, the phenomenon of parametric resonance in a linear torsion spring oscillator caused by a square-wave modulation of its moment of inertia is explained and investigated both analytically and with the help of a computer simulation.
Abstract: The phenomenon of parametric resonance in a linear torsion spring oscillator caused by a square-wave modulation of its moment of inertia is explained and investigated both analytically and with the help of a computer simulation. Characteristics of parametric resonance and regeneration are found and discussed in detail. Ranges of frequencies within which parametric excitation is possible are determined. Stationary oscillations at the boundaries of these ranges and at the threshold conditions are investigated.
34 citations
TL;DR: In this article, a simple and intuitive calculational method for estimating the efficiency of parametric amplification as a function of parameters is presented, which is important for determining whether resonant amplification plays an important role in the reheating process.
Abstract: Parametric resonance has been discussed as a mechanism for copious particle production following inflation. Here we present a simple and intuitive calculational method for estimating the efficiency of parametric amplification as a function of parameters. This is important for determining whether resonant amplification plays an important role in the reheating process. We find that significant amplification occurs only for a limited range of couplings and interactions.
34 citations
TL;DR: High-power and single-frequency operation of a continuous-wave singly resonant potassium titanyl phosphate (KTiOPO(4) optical parametric oscillator in a ring-cavity configuration is reported.
Abstract: We report high-power and single-frequency operation of a continuous-wave singly resonant potassium titanyl phosphate (KTiOPO4) optical parametric oscillator in a ring-cavity configuration The ring singly resonant optical parametric oscillator threshold is 43 W When the oscillator is pumped by 67 W of 532-nm radiation from an 112-W single-frequency resonantly doubled Nd:YAG laser, 19 W of single-axial-mode output is generated at the idler wavelength of 1039 nm
34 citations