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.
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TL;DR: In this paper, the authors review recent advances in the research on quantum parametric phenomena in superconducting circuits with Josephson junctions and discuss physical processes in parametrically driven tunable cavity and outline theoretical foundations for their description.
Abstract: We review recent advances in the research on quantum parametric phenomena in superconducting circuits with Josephson junctions. We discuss physical processes in parametrically driven tunable cavity and outline theoretical foundations for their description. Amplification and frequency conversion are discussed in detail for degenerate and non-degenerate parametric resonance, including quantum noise squeezing and photon entanglement. Experimental advances in this area played decisive role in successful development of quantum limited parametric amplifiers for superconducting quantum information technology. We also discuss nonlinear down-conversion processes and experiments on self-sustained parametric and subharmonic oscillations.
27 citations
TL;DR: In this paper, the operation of an optical parametric oscillator which is directly pumped by the 1.06μ output of a continuously pumped, repetitively Q-switched Nd:YAG laser is described.
Abstract: The operation of an optical parametric oscillator which is directly pumped by the 1.06‐μ output of a continuously pumped, repetitively Q‐switched Nd:YAG laser is described. The oscillator uses a 3‐mm lithium niobate crystal in a non−90° orientation as the nonlinear material. 17 mW of average output power at 2 μ have been obtained giving an oscillator conversion efficiency of 8%. Measurements are also reported of pump power threshold, pump depletion, and wavelength tuning of the oscillator. No optically induced index inhomogeneities were observed in the lithium niobate.
27 citations
TL;DR: Evidence for soliton formation in a Ti:sapphire-laser-pumped femtosecond optical parametric oscillator is reported and quantitative agreement with existing theory is implied.
Abstract: We report evidence for soliton formation in a Ti:sapphire-laser-pumped femtosecond optical parametric oscillator. Appropriate conditions of dispersion are discussed, and temporal and spectral measurements of the output pulses are presented. Quantitative agreement with existing theory is implied.
27 citations
TL;DR: The Josephson array-mode parametric amplifier (JAMPA) as mentioned in this paper is a near-quantum-limited amplifier with a large tunable bandwidth and high dynamic range.
Abstract: We introduce a near-quantum-limited amplifier with a large tunable bandwidth and high dynamic range---the Josephson array-mode parametric amplifier (JAMPA). The signal and idler modes involved in the amplification process are realized by the array modes of a chain of 1000 flux-tunable Josephson-junction-based nonlinear elements. The frequency spacing between the array modes is comparable to the flux tunability of the modes, ensuring that any desired frequency can be occupied by a resonant mode, which can further be pumped to produce high gain. We experimentally demonstrate that the device can be operated as a nearly quantum-limited parametric amplifier with 20 dB of gain at almost any frequency within a 4--12-GHz band. On average, it has a 3-dB bandwidth of 11 MHz and an input 1-dB compression power of $\ensuremath{-}108\phantom{\rule{0.2em}{0ex}}\mathrm{dBm}$, which can go as high as $\ensuremath{-}93\phantom{\rule{0.2em}{0ex}}\mathrm{dBm}$. We envision the application of such a device to the time- and frequency-multiplexed readout of multiple qubits, as well as to the generation of continuous-variable cluster states.
27 citations
10 Jun 2007
TL;DR: In this article, an oscillator circuit is proposed that simultaneously excites and tracks two harmonic resonances in a piezoelectric resonant sensor that can be a quartz crystal resonator (QCR) sensor.
Abstract: An oscillator circuit is proposed that simultaneously excites and tracks two harmonic resonances in a piezoelectric resonant sensor that, in particular, can be a quartz crystal resonator (QCR) sensor. By probing the resonator at two harmonic modes at the same time, enhanced sensing capabilities can be conveniently achieved because a larger set of parameters can be measured with a single sensor, thereby increasing the information content and accuracy. The principle and circuit architecture can be extended from QCRs to a larger class of piezoelectric microresonator sensors. The oscillator was tested with AT-cut crystals simultaneously operated at the fundamental and third harmonic, both in air and in contact with liquid. The results show an excellent agreement between the oscillator readings and reference measurements taken with an impedance analyzer.
27 citations