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, a parametric amplification of signal radiation with a wavelength of 911 nm in a pump field with a length of 527 nm was used for phase matching in a DKDP crystal.
Abstract: The ultra-broadband phase matching was experimentally observed in a DKDP crystal upon parametric amplification of signal radiation with a wavelength of 911 nm in a pump field with a wavelength of 527 nm. The original scheme was used to excite the first parametric amplification stage by chirped pulses of idler radiation with a wavelength of 1250 nm. The saturated gain of a three-stage parametric amplifier was equal to 108.
25 citations
TL;DR: Interferences in the quantum fluctuations of the output of a parametric amplifier when the cavity is driven by a quantized field at the signal frequency are reported.
Abstract: We report interferences in the quantum fluctuations of the output of a parametric amplifier when the cavity is driven by a quantized field at the signal frequency. The interferences depend on the phase fluctuations of the input quantized field and result in splitting of the spectrum of the output, and thus the recent observation [H. Ma et al., Phys. Rev. Lett. 95, 233601 (2005)] of interferences in the classical domain have a very interesting counterpart in the quantum domain. The interferences can be manipulated, for example, by changing the amount of squeezing in the input field.
25 citations
TL;DR: In this article, the authors demonstrate parametric oscillation of discrete polariton states in a single squared GaAs/GaAlAs micropillar cavity with a continuous wave pump laser.
Abstract: We demonstrate parametric oscillation of discrete polariton states in a single squared GaAs/GaAlAs micropillar cavity. Resonantly exciting a selected polariton mode with a continuous wave pump laser, parametric oscillation is evidenced on the two neighbored modes (signal and idler). Abrupt switch-off of the device is observed under high excitation. We present comprehensive results concerning the power-dependence of the energy and linewidth of the emission resonances as well as their far-field patterns. Quantum Monte Carlo calculations give a quantitative understanding of the physics of this micro-optical parametric oscillator involving fully confined discrete polariton modes.
25 citations
TL;DR: In this paper, it was shown that a marginal ion sound instability in a plasma behaves in a manner similar to that predicted by a Van der Pol type of nonlinear equation including anharmonic terms.
Abstract: Results are presented which show that a marginal ion sound instability in a plasma behaves in a manner similar to that predicted by a Van der Pol type of nonlinear equation including anharmonic terms. Experiments have been performed in which the system is subjected to an external driving force at the fundamental frequency omega 0, and the subharmonic frequencies, which shows that the instability exhibits characteristics similar to the classical nonlinear phenomena of 'jumps' including the associated hysteresis effect. When the system is driven by a forcing oscillation at the harmonic frequencies 2 omega o or 3 omega o, the instability behaves differently from linear forced resonance, and exhibits a behaviour similar to a parametric oscillator. A theory developed to describe this ion sound instability under these various conditions, is compared with the experimental results, and good agreement is obtained.
25 citations
TL;DR: In this article, a stability investigation of actuators with variable stiffness and damping elements is presented, and conditions for full vibration suppression are derived analytically by applying a singular perturbation method of first order.
25 citations