Materials with strong second-order ( χ ( 2 stretchy="false">) ) optical nonlinearity, especially lithium nio...

We study microwave response of a Josephson parametric oscillator consisting superconducting transmission-line resonator with an embedded DC-superconducting quantum interference device (-SQUID). The DC-SQUID allows to control the magnitude Kerr nonlinearity over ranges where it is smaller or larger than photon loss rate. Spectroscopy measurements reveal change in from classical Duffing single de...

An algorithm for generating quasi-harmonic self-oscillations with a uniformly widened spectral line is presented. The based on the equation of motion Thomson-type DT-oscillator, which introduced random effect in form band-pass white noise. Two types effects are implemented: additive and parametric. Spectral characteristics generated were analyzed by numerical experiment. shown to generate ampli...

Using ultrashort laser pulses, we have observed quadrature squeezing and parametric gain in quasi-phase-matched KTiOPO(4) waveguides. Using a local oscillator pulse that is 2.5 times shorter than the squeezed pulse, we observed noise reduction of 12 +/- 1% below the shot-noise level. Parametric amplification and deamplification of a coherent seed pulse have also been observed, with no indicatio...

We observed parametric-generation efficiency of 1.61% from 1064 to 1071 nm and at 162 microm in a 0.5 mm thick, 45 mm long z-cut congruent lithium niobate waveguide with a pump energy of 2.2 mJ and a pump pulse width of 5.8 ns. We also measured an ultralow-threshold intensity of 70 MW/cm2 for a 1064 nm pumped parametric oscillator resonating at 1071 nm and emitting at 162 microm with a 1 mm thi...