相关实验视频

Updated: Jun 3, 2025

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
09:38

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

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基于光学生成的频率调制脉冲的微秒响应超快微波测距方法

Yifei Sun1,2, Yongchao Chen1, Longhuang Tang1

  • 1National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 622150, China.

Sensors (Basel, Switzerland)
|January 11, 2025
PubMed
概括

这项研究引入了一种使用光学生成脉冲的超快微波测距方法. 新技术显著提高了距离测量的时间分辨率,改进了现有技术.

关键词:
移位变化 变化 移位变化微波 FMCW 雷达 微波 FMCW 雷达 雷达超快的距离距离可以实现.

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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

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相关概念视频

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
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