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
TL;DR: In this article, a frequency down-conversion system comprising three-level atoms in a cavity was studied and the squeezing in the intensity difference was calculated and found, in general, to be degraded by spontaneous emission.
Abstract: An ideal nondegenerate parametric oscillator is known to give perfect squeezing in the difference of the intensities of the signal and idler modes. In this paper, we look at a frequency down-conversion system comprising three-level atoms in a cavity. The squeezing in the intensity difference is calculated and found, in general, to be degraded by spontaneous emission. In the limit of large detunings, the system is found to behave as a nondegenerate parametric oscillator.
37 citations
TL;DR: In this paper, the authors studied the pump coherent dynamics in a II-VI microcavity parametric amplifier, using angle-resolved four-wave mixing, and found an angle-dependent collision broadening associated with the efficiency of the polariton scattering towards the excitonic reservoir.
Abstract: We studied the pump coherent dynamics in a II-VI microcavity parametric amplifier, using angle-resolved four-wave mixing. The polariton parametric amplification is found to result in a strong quenching and saturation of the pump coherence lifetime above the threshold. For the polariton scattering processes that remain below the amplification threshold, we find an angle-dependent collision broadening associated with the efficiency of the polariton scattering towards the excitonic reservoir.
37 citations
TL;DR: A widely tunable synchronously pumped coherent source based on the process of narrowband parametric amplification in a dispersion-shifted fiber that yields oscillations at 1970 to 2140 nm-the longest reported wavelength for a fiber parametric oscillator.
Abstract: We describe a widely tunable synchronously pumped coherent source based on the process of narrowband parametric amplification in a dispersion-shifted fiber. Using an experimental fiber with a zero-dispersion wavelength of 1590nm and pump wavelengths of 1530 to 1570nm yields oscillations at 1970 to 2140nm—the longest reported wavelength for a fiber parametric oscillator. The long-wavelength oscillations are accompanied by simultaneous short-wavelength oscillations at 1200 to 1290nm. The parametric gain is coupled to stimulated Raman scattering. For parametric oscillations close to the Raman gain peak, the two gain processes must be discriminated from each other. We devised two configurations that achieve this discrimination: one is based on the exploitation of the difference in group delay between the wavelengths where Raman and parametric gain peak, and the other uses intracavity polarization tuning.
37 citations
TL;DR: The ability to pump an OPG-OPA with compact, high-repetition-rate, intrinsically narrow-bandwidth microlasers is made possible by the high gain of PPLN, a tunable light source that is well suited for use in portable spectroscopic gas sensors.
Abstract: For what is believed to be the first time, a single-longitudinal-mode passively Q-switched Nd:YAG microlaser is used to pump a narrow-bandwidth periodically poled lithium niobate (PPLN) optical parametric generator–optical parametric amplifier (OPG–OPA). Before amplification in the OPA, the output of the OPG stage was spectrally filtered with an air-spaced etalon, resulting in spectroscopically useful radiation (bandwidth, ∼0.05 cm-1 FWHM) that was tunable in 15‐cm-1 segments anywhere in the signal range 6820–6220 cm-1 and the idler range 2580–3180 cm-1. The ability to pump an OPG–OPA with compact, high-repetition-rate, intrinsically narrow-bandwidth microlasers is made possible by the high gain of PPLN. The result is a tunable light source that is well suited for use in portable spectroscopic gas sensors.
37 citations
TL;DR: In this paper, the Galerkin method was applied, the shape function being that governing the beam's natural vibrations, evidencing the possibility of in-plane and out-of-plane vibrations as well as fully non-planar vibrations in the combination resonance range.
37 citations