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相关概念视频

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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相关实验视频

Updated: Jun 14, 2026

Implementation of a Reference Interferometer for Nanodetection
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纳米双测距使用光子级微空洞单子.

Zihao Wang1, Yifei Wang1, Baoqi Shi2,3

  • 1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing, China.

Nature communications
|July 27, 2025
PubMed
概括

这项研究引入了使用微共振器单子对进行精确距离测量的双测距 (DCR). 这种新方法即使在低回报功率下也能达到纳米精度,从而实现了先进的应用.

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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相关实验视频

Last Updated: Jun 14, 2026

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科学领域:

  • 光子学和计量学 在
  • 集成光学 集成光学 集成光学
  • 精确度测量 精确度测量 精确度测量

背景情况:

  • 绝对距离测量对于纳米技术和卫星形成至关重要.
  • 微型系统在实现高精度,高速和低回报功率同时面临挑战.
  • 现有的基于激光的方法很难满足对紧型设备的所有要求.

研究的目的:

  • 为了演示一个小型的双射程 (DCR) 系统,具有高精度和低回报功率.
  • 为了利用微型技术提高射程能力.
  • 为DCR系统建立一个优化原则.

主要方法:

  • 在一个集成的微共振器中生成一个连贯的单子对.
  • 使用双测距 (DCR) 与微的大线间距.
  • 导出方程以将DCR精度与线功率联系起来.

主要成果:

  • 在距离测量中达到1纳米的精度.
  • 在0.9MHz的频率上测量纳米级振动.
  • 通过极低的接收光子数 (每脉冲5.5×10−4) 证明了精确的DCR.
  • 展示了对抗强度噪声和损失的强度.

结论:

  • 基于微的DCR为高性能,小型化的绝对距离测量提供了解决方案.
  • 开发的系统集成了高精度范围与造厂制造的光子芯片.
  • 这项工作提供了对DCR精度的定量理解以及双系统的优化原理.