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.

Josephson traveling-wave parametric amplifier with three-wave mixing

Abstract: We develop a concept of the traveling-wave Josephson parametric amplifier exploiting quadratic nonlinearity of a serial array of one-junction SQUIDs embedded in a superconducting transmission line. The external magnetic flux applied to the SQUIDs makes it possible to efficiently control the shape of their current-phase relation and, hence, the balance between quadratic and cubic (Kerr-like) nonlinearities. This property allows us to operate in the favorable three-wave-mixing mode with minimal phase mismatch, an exponential dependence of the power gain on number of sections $N$, a large bandwidth, a high dynamic range, and substantially separated signal ($f_s$) and pump ($f_p$) frequencies obeying relation $f_s+f_i = f_p$, where $f_i$ is the idler frequency. An estimation of the amplifier characteristics with typical experimental parameters, a pump frequency of $12$ GHz, and $N = 300$ yields a flat gain of 20 dB in the bandwidth of 5.6 GHz.

Quantum analysis of intensity fluctuations in the nondegenerate parametric oscillator

Abstract: A quantum analysis of the intensity fluctuations is given for the nondegenerate parametric oscillator both above and below threshold. Theoretical analysis and experiments by Heidmann, Horowicz, Reynaud, Giacobino, and Fabre [Phys. Rev. Lett. 59, 2555 (1987)] have shown that a noise suppression below the vacuum level is possible in the difference of the intensities of the signal and idler modes. The effect of nonequal cavity decay rates and intracavity losses is shown to modify significantly the fluctuation spectra for the difference in the intensity of the signal and idler beams. The results of exact nonlinear solutions for the internal cavity modes are discussed. We demonstrate that a very sensitive absorption detector may be made by operating the oscillator near threshold.

Output properties of parametric amplifiers in cavities

Abstract: The theory of a parametric amplifier in a cavity is given for both the degenerate and the nondegenerate modes of operation. Previous work on the degenerate case is extended to include the effects of a coherent input and to derive the degrees of coherence and photodetection statistics of the output. Analogous calculations are performed for the nondegenerate parametric amplifier, and particular attention is given to the effects of correlations between the light beams formed from the two frequency components. These are contrasted with the analogous effects for the parametric media in free space often used in experimental studies.

High-efficiency mid-infrared ZnGeP 2 optical parametric oscillator in a multimode-pumped tandem optical parametric oscillator

Abstract: We demonstrate a high-efficiency ZnGeP2 optical parametric oscillator (OPO) pumped by another KTP OPO in a multimode-pumped tandem OPO configuration. The maximum optical-to-optical and slope efficiencies were 32% and 42.5%, respectively. Our setup also provides tunable multiband radiation in the 2.03–2.32-µm range and the 2.9–6.2-µm range simultaneously.