Topic
Sinusoidal pump
About: Sinusoidal pump is a research topic. Over the lifetime, 11 publications have been published within this topic receiving 70 citations.
Papers
TL;DR: It is shown theoretically that it is possible to generate Nyquist pulses using parabolic pulses as a pump and that by using a sinusoidal pump (pump intensity modulated by an RF tone), it is Possible to obtain pulses with characteristics that are close to Nyquist limited pulses.
Abstract: A novel method using optical fiber parametric amplification and phase modulation is proposed in order to generate Nyquist pulses. Using parabolic pulses as a pump, we show theoretically that it is possible to generate Nyquist pulses. Furthermore, we show that by using a sinusoidal pump (pump intensity modulated by an RF tone), it is possible to obtain pulses with characteristics that are close to Nyquist limited pulses. We demonstrate experimentally the generation of bandwidth limited pulses with full width half maximum of 14 ps at 10 GHz repetition rate. We also discuss limitations of this method and means to overcome these limitations.
32 citations
TL;DR: This study showed that it is feasible to generate pressure pulsatility with pump speed modulation; the platform is suitable for evaluating the physiologic impact of pulsatility and allows determination of the best speed modulations in terms of magnitude, frequency, and profiles.
Abstract: The purpose of this study was to evaluate the effects of sinusoidal pump speed modulation of the Cleveland Clinic continuous-flow total artificial heart (CFTAH) on hemodynamics and pump flow in an awake chronic calf model. The sinusoidal pump speed modulations, performed on the day of elective sacrifice, were set at ±15 and ± 25% of mean pump speed at 80 bpm in four awake calves with a CFTAH. The systemic and pulmonary arterial pulse pressures increased to 12.0 and 12.3 mmHg (±15% modulation) and to 15.9 and 15.7 mmHg (±25% modulation), respectively. The pulsatility index and surplus hemodynamic energy significantly increased, respectively, to 1.05 and 1346 ergs/cm at ±15% speed modulation and to 1.51 and 3381 ergs/cm at ±25% speed modulation. This study showed that it is feasible to generate pressure pulsatility with pump speed modulation; the platform is suitable for evaluating the physiologic impact of pulsatility and allows determination of the best speed modulations in terms of magnitude, frequency, and profiles.
18 citations
Patent•
20 May 1994
TL;DR: In this paper, a diode is connected between an input network and an output network linked to an output port of a mixer, which together cause the diode to switch rapidly between ON and OFF states and behave as with square wave drive.
Abstract: A mixer converting a frequency of an input signal to an intermediate frequency has an input port receiving an input signal oscillating at a signal frequency and a sinusoidal pump wave oscillating at a pump frequency. A diode is connected between an input network linked to the input port and an output network linked to an output port of the mixer. The output network and the input network together cause the diode to switch rapidly between ON and OFF states and behave as with square wave drive. Bias circuitry connected to the diode comprises a resistor connected to receive a DC component of current from the diode, the current through the resistor solely biasing the diode.
10 citations
TL;DR: In this paper, the authors demonstrated the generation of a picosecond pulse train by taking advantage of the cross-gain occurring in a dispersion-oscillating fiber, where the resulting frequency-converted signal is detuned by more than 20 nm from the pump and can be temporally compressed by a factor of 2 compared with the input sinusoidal pump wave.
Abstract: The generation of a picosecond pulse train is demonstrated taking advantage of the cross-gain occurring in a dispersion-oscillating fibre. The resulting frequency-converted signal is detuned by more than 20 nm from the pump and can be temporally compressed by a factor of 2 compared with the input sinusoidal pump wave.
10 citations
Patent•
10 Jun 1987
TL;DR: In this article, a sinusoidal pump/motor with curved parallel trackways for the vanes and a vane carrier ring has been presented, where vanes are forced to alternatively sweep each chamber's volume content either to pump fluid or to be driven by incoming pressurised fluid.
Abstract: A sinusoidal pump/motor which utilises a constant work area of each vane throughout each revolution has curved parallel trackways 3,4 for the vanes 1 and a vane carrier ring 2, providing work chambers around the circumference on both sides of the ring. The vanes are forced to alternatively sweep each chamber's volume content either to pump fluid or to be driven by incoming pressurised fluid. In an alternative embodiment (Figure 2), the vanes extend axially of the rotational axis of the pump/motor and cooperate with a pair of axially-spaced trackways.
7 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2017 | 1 |
| 2014 | 2 |
| 2013 | 1 |
| 2012 | 1 |
| 2001 | 1 |