We report on the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use superconducting nonlinear asymmetric inductive element (SNAIL) loops, biased with dc magnetic flux. In addition, equip device dispersion engineering features to create stopband at second harmonic pump and suppress propagation hig...

Optical parametric amplification controlled by the auxiliary electromagnetic field enables transparency, amplification, and oscillation with no cavity in strongly absorbing negative-index metamaterials. The opposite directions of the wave vector and the Poynting vector in such materials result in extraordinary optical properties, including "backward" phase matching and the generation of entangl...

We use an Eulerian Vlasov code to study the problem of the amplification of seed pulses by Brillouin backscattering in the strong-coupling regime. In this process, there is an energy transfer, mediated by a resonant ion wave, from a long, high energy pump electromagnetic wave, to an initially counter-propagating ultra-short seed pulse. The code solves the onedimensional Vlasov-Maxwell set of eq...

Amplification of signal intensity is essential for initiating physical processes, diagnostics, sensing, communications and measurement. During traditional amplification, the signal is amplified by multiplying the signal carriers through an active gain process, requiring the use of an external power source. In addition, the signal is degraded by noise and distortions that typically accompany act...

We report on the signal-to-noise performance of a nanoinjection imager, which is based on a short-wave IR InGaAs/GaAsSb/InP detector with an internal avalanche-free amplification mechanism. Test pixels in the imager show responsivity values reaching 250 A/W at 1550 nm, -75 degrees C, and 1.5V due to an internal charge amplification mechanism in the detector. In the imager, the measured imager n...

Based on the higher order nonlinear Schrödinger equation, the amplification and the reshaping of ultrashort pulses are investigated. The numerical results show that the direct amplification of femtosecond pulses can be achieved by injecting a continuous wave (CW) and filtering the CW at suitable positions in the presence of higher-order dispersion and nonlinear effects. The combination of conti...

NO modulates resting blood pressure and wave reflection. The effect of NO on exercise central hemodynamics is unknown but has important implications relating to cardiovascular risk. The aim of this study was to determine the contribution of NO to pulse pressure (PP) amplification and wave reflection during exercise. Twelve healthy men aged 29+/-1 years (mean+/-SEM) undertook cycle exercise at 6...