scispace - formally typeset
Search or ask a question
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
More filters
Journal ArticleDOI
TL;DR: In this article, the authors derived the theory of subharmonic emission by parametrically excited distortion modes, which can explain the low level of the threshold, accounts for the observed oscillating ripples on bubble surface and demonstrates the coincidence between the frequency band where the emission of ω i ± ω p 2 signals were registered, and the one where parametric excitation of distortion modes are possible.

60 citations

Patent
08 Sep 1980
TL;DR: In this paper, the authors presented a self-alignment procedure for a set of individually controlled varactor tuned circuits and an oscillator with a phase-locked loop to move to a new target frequency.
Abstract: A tuner includes a channel or target frequency selection means, a tunable oscillator, a tunable circuit means having at least one tunable circuit, and tuning means, responding to the target frequency select means, for automatically and individually tuning the tunable circuit. Typically the tuner includes several tunable circuits, which are tuned successively. The illustrated embodiments have three individually controlled varactor tuned circuits and a varactor tuned oscillator. To move to a new target frequency, the tuner locks the oscillator to the target frequency via a phase locked loop. This target frequency is inputted to the first varactor tuned circuit, and a microprocessor cooperating with a DC detector for sensing the output of the set of tuned circuits steps a voltage step generator which controls the first varactor tuned circuit while the tuning of the other varactor tuned circuits is held fixed. The microprocessor adjusts the voltage step generator to maximize the DC output and signals corresponding to this voltage are stored in a memory. Next, the second varactor tuned circuit having a corresponding voltage step generator is adjusted in the same way, and corresponding signals are stored in memory. This continues until all varactor tuned circuits are locked to the target frequency, after which the varactor tuned oscillator is returned to its standard frequency of 43.5 MHz greater than the target frequency. In a second embodiment, one oscillator remains at 43.5 MHz higher than the target frequency and cooperates with a mixer and a 43.5 MHz oscillator to provide a target frequency signal for use in the self-alignment procedure.

60 citations

Journal ArticleDOI
TL;DR: The beat frequency of the signal and idler subharmonic outputs of a tunable cw KTP optical parametric oscillator was phase locked to a microwave reference frequency source, which permitted precise determination of the output frequencies at approximately half the input pump frequency.
Abstract: We report the experimental demonstration of a novel optical parametric oscillator approach to tunable optical frequency division. The beat frequency of the signal and idler subharmonic outputs of a tunable cw KTP optical parametric oscillator was phase locked to a microwave reference frequency source, which thus permitted precise determination of the output frequencies at approximately half the input pump frequency.

60 citations

Journal ArticleDOI
01 Jan 2010-EPL
TL;DR: In this article, the authors established an explicit analogy between the dynamical Casimir effect and the photon emission of a thin non-linear crystal pumped inside a cavity and proposed a system based on a type-I optical parametric oscillator (OPO) to simulate a cavity oscillating in vacuum at optical frequencies.
Abstract: We establish an explicit analogy between the dynamical Casimir effect and the photon emission of a thin non-linear crystal pumped inside a cavity. This allows us to propose a system based on a type-I optical parametric oscillator (OPO) to simulate a cavity oscillating in vacuum at optical frequencies. The resulting photon flux is expected to be more easily detectable than with a mechanical excitation of the mirrors. We conclude by comparing different theoretical predictions and suggest that our experimental proposal could help discriminate between them.

59 citations


Network Information
Related Topics (5)
Nonlinear system
208.1K papers, 4M citations
84% related
Boundary value problem
145.3K papers, 2.7M citations
83% related
Scattering
152.3K papers, 3M citations
82% related
Optical fiber
167K papers, 1.8M citations
81% related
Excited state
102.2K papers, 2.2M citations
81% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202366
2022133
2021123
2020139
2019145
2018135