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相关概念视频

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

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相关实验视频

Updated: Jun 28, 2026

Quasi-light Storage for Optical Data Packets
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基于线性光学采样的一百五秒级的简洁光学时间延迟测量系统.

Yufei Zhang1, Ziyang Chen1, Dongrui Yu1

  • 1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, and Center for Quantum Information Technology, Peking University, Beijing 100871, China.

The Review of scientific instruments
|December 8, 2023
PubMed
概括

我们使用线性光学采样开发了一种精确的光学时间延迟测量系统. 这种简化系统采用两个光学频率,在光纤长度波动分析中达到100 fs以下的精度.

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 计量学 计量学 计量学
  • 光纤光学是指光纤的使用.

背景情况:

  • 纤维延迟测量对于各种科学和技术领域至关重要.
  • 精确测量光纤时间延迟对于系统性能至关重要.

研究的目的:

  • 提出和演示一个高精度,简化的光学时间延迟测量系统.
  • 为了达到100 femtoseconds (fs) 以上的测量精度.
  • 调查开发系统的精度限制.

主要方法:

  • 使用线性光学采样技术.
  • 采用两个光学频率,没有载体-信封-抵消频率锁定.
  • 分析来自频率源的计时动噪声.

主要成果:

  • 展示了一个高精度和简洁的光学延迟测量系统.
  • 在平均值下取得的精度超过100 fs.
  • 确定了定时动作为主要限制,主要是非常见模式和源限制.
  • 展示了测量低于10微米的纤维长度波动的能力.

结论:

  • 拟议的系统提供了一种简化但高度精确的光学时间延迟测量方法.
  • 该系统的精度足以检测小型光纤长度波动,从而使外部干扰分析成为可能.
  • 这项技术在需要精确光纤链路监控的领域有潜在的应用.