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相关概念视频

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

203
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
203
Parallel Resonance01:23

Parallel Resonance

209
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
209
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

774
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
774

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相关实验视频

Updated: Jul 1, 2025

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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使用莫雷加快效应的多模式集成微振热器

Qing-Xin Ji1, Peng Liu1, Warren Jin2,3

  • 1T. J. Watson Laboratory of Applied Physics, Caltech, Pasadena, CA 91125, USA.

Science (New York, N.Y.)
|March 7, 2024
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种Moiré加速分散调方法,用于高Q微振荡器. 这一创新使得一个单一的设备可以根据需求在Brillouin激光器,明亮微和暗微模式之间切换,从而增强光子集成电路.

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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Last Updated: Jul 1, 2025

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科学领域:

  • 光子学
  • 集成光学
  • 微共振器技术

背景情况:

  • 高Q微振解器对于光子集成电路至关重要,但在制造后具有固定的操作模式.
  • 重构微共振器模式通常需要重新设计物理几何,限制设备的多功能性.

研究的目的:

  • 引入一个新的Moiré加速分散调方法,用于可重新配置的微共振器操作.
  • 在单个混合集成设备中,在多个操作模式之间按需切换.

主要方法:

  • 使用Vernier合环进行电气调节.
  • 实施了莫伊尔加速分散调技术.
  • 使用单波长进行模式切换.

主要成果:

  • 用同一个设备成功切换了Brillouin激光,明亮微型和暗微型模式.
  • 在电信C频段展示了Brillouin相匹配和微操作.
  • 实现了灵活的混合模式运行与按需模式切换.

结论:

  • 提出的Moiré加速分散调方法使微共振器设备具有前所未有的操作灵活性.
  • 一个单一的通用微共振器设计现在可以满足各种应用,减少复杂性和成本.
  • 这种进步显著提高了可重新配置混合模式操作的集成光子电路的能力.