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相关实验视频

Updated: Dec 20, 2025

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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连贯的光学时钟向下转换对于微波频率的不稳定性为10~18

Takuma Nakamura1,2, Josue Davila-Rodriguez3, Holly Leopardi3,2

  • 1Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, USA. takuma.nakamura@nist.gov franklyn.quinlan@nist.gov.

Science (New York, N.Y.)
|May 23, 2020
PubMed
概括

研究人员创建了一个10千兆赫的微波信号, 这一突破使得时间计时,导航和科学成像等领域的应用更加先进.

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科学领域:

  • 测量学
  • 原子物理
  • 信号处理

背景情况:

  • 光学原子钟比目前的微波标准更稳定,更准确.
  • 现有的电子系统对于雷达,导航和通信至关重要,
  • 弥合光学时钟和电子领域的性能差距对于技术进步至关重要.

研究的目的:

  • 将光学原子钟的高性能转移到电子领域.
  • 产生一个微波信号, 忠实地复制光学时钟的阶段.
  • 在时间传播,导航和干扰成像方面实现新的应用.

主要方法:

  • 两个独立的光电信号发生器进行比较.
  • 使用先进的相位追踪技术.
  • 描述生成的微波信号的频率不稳定性.

主要成果:

  • 显示了10千兆赫的微波信号与相位跟踪光学时钟.
  • 在电子领域实现了1 × 10-18的绝对分数频率不稳定性.
  • 在微波信号中确认了光学时钟相的真实复制.

结论:

  • 开发的方法成功地将光学时钟性能转移到电子领域.
  • 这项技术显著提高了光学时钟在实际应用中的潜力.
  • 开辟了精确时间传播,增强导航系统和长基线干扰成像的新途径.