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Oscillations In An LC Circuit01:30

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An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
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Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as...
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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具有光子引用的极其稳定的振荡器.

Kemal Şafak, Erwin Cano Vargas, Anan Dai

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    此摘要是机器生成的。

    研究人员开发了一个更简单的光子微波振荡器PRESTO,使用更少的组件. 这种高性能,稳定的振荡器为各种先进应用提供了更容易获得的解决方案.

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    科学领域:

    • 光子学 是一个光子学.
    • 微波工程 微波工程
    • 光学物理学的光学物理学

    背景情况:

    • 光子微波振荡器对于电信和雷达等应用至关重要,原因是高频率的低相噪声.
    • 当前最先进的光子振荡器使用复杂,重和昂贵的光学频率与多个稳定环.
    • 这些系统带来了运营挑战和高维护成本,限制了它们的广泛采用.

    研究的目的:

    • 推出一种简化且高性能的光子微波振荡器.
    • 为了减少与现有的光子振荡器技术相关的复杂性和成本.
    • 为了展示一个紧而可靠的解决方案,用于生成稳定的微波信号.

    主要方法:

    • 开发一个光子引用的极其稳定的振荡器 (PRESTO).
    • 采用简化的架构,包括 femtosecond 激光器,光纤延迟元件和脉冲定时探测器.
    • 阶段噪声和定时动性能的表征.

    主要成果:

    • 普雷斯托实现了极好的相位噪声水平:1kHz时达到-125dBc/Hz,1kHz时达到-145dBc/Hz,10kHz时达到<-160dBc/Hz,100kHz时达到>100kHz.
    • 在 [100 Hz-1 MHz] 带宽上显示的集成定时动仅为 2 fs RMS.
    • 与传统光子振荡器相比,该系统的复杂性大大降低.

    结论:

    • 普雷斯托为传统光子微波振荡器提供了一种简化,经济高效和高性能的替代方案.
    • 紧的设计和强大的性能使得PRESTO适合缩小和简化先进系统.
    • 这项技术为在不同领域更广泛地实施稳定光子微波信号铺平了道路.