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相关概念视频

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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一个带有微组件功能的福里埃域模式锁定了LIDAR.

Zhaoyu Cai1, Zihao Wang1, Ziqi Wei1

  • 1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China.

Science advances
|February 5, 2025
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概括

本研究介绍了一种新的频率调制连续波 (FMCW) 光检测和测距 (LIDAR) 系统,其精度低于10纳米,更新速率为24.6kHz. 先进的FMCW LIDAR使用福里埃域模式锁定激光和微来提高自主技术性能.

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 自主系统 自主系统
  • 计量学 计量学 计量学

背景情况:

  • 频率调制连续波 (FMCW) 光检测和测距 (LIDAR) 对自动驾驶技术至关重要,它提供低回归功率操作和同时获得距离/速度.
  • 当前的FMCW LIDAR系统在实现高更新率以及微米以下精度方面面临着挑战.

研究的目的:

  • 开发一个FMCW LIDAR系统,提高精度和快速更新速度.
  • 为了证明微在实现LIDAR的超高速频率扫描中的应用.

主要方法:

  • 宽带福里埃域模式锁定 (FDML) 激光器与化单离子微组合器的集成.
  • 使用50千兆赫的微线性化超高频的声速率高达每秒320 petahertz.
  • 理论分析以解决FMCW速度测量的非线性频率扫描.

主要成果:

  • 在FMCW LIDAR系统中实现了10纳米以下的精度和24.6千赫的更新速率.
  • 证明了速度测量,不确定性低于每秒0.4毫米.
  • 验证了微在使超高速频率扫描激光器的有效性.

结论:

  • 开发的FMCW LIDAR系统克服了以前的精度和速度限制.
  • 微被证明是推动LIDAR应用中超高速频率扫描激光器的关键技术.
  • 这项工作为更有能力的自主系统铺平了道路.