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相关概念视频

Active Filters01:25

Active Filters

773
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
773
Second-order Op Amp Circuits01:19

Second-order Op Amp Circuits

300
Implementing second-order low-pass filters in audio systems is crucial in refining audio signals by eliminating undesirable high-frequency noise. These filters typically involve second-order op-amp circuits configured as voltage followers, encompassing two nodes with distinct storage elements.
The analysis of such circuits follows a systematic approach, similar to the second-order RLC circuits. In practical scenarios, bulky inductors are rarely employed due to their size and weight. This means...
300
Passive Filters01:27

Passive Filters

512
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
512
Second-Order Circuits01:17

Second-Order Circuits

1.3K
Integrating two fundamental energy storage elements in electrical circuits results in second-order circuits, encompassing RLC circuits and circuits with dual capacitors or inductors (RC and RL circuits). Second-order circuits are identified by second-order differential equations that link input and output signals.
Input signals typically originate from voltage or current sources, with the output often representing voltage across the capacitor and/or current through the inductor. For example, in...
1.3K
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

172
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
172
Op Amp AC Circuits01:18

Op Amp AC Circuits

184
Within an audio system, the filter circuit plays a pivotal role in processing the amplified audio signal from an amplifier. Its primary function is significantly attenuating signal components with lower frequencies, thereby shaping the audio output. This circuit's operations are examined, focusing on the fundamental filter configuration. This configuration involves an operational amplifier arranged in an inverting setup coupled with resistors (R1 and R2) and a capacitor (C1).
184

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相关实验视频

Updated: Jun 5, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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可重新配置的二级光学全通波器.

Yu Chen1, Lu Xu1, WeiJun Jiang1

  • 1Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
概括
此摘要是机器生成的。

我们使用微波振器开发了一种新的二级光学全通波器 (APF). 该设备可实现可调节的时间延迟和相位移,克服现有的光信号操纵第一阶段APF的局限性.

关键词:
所有通道过器过器微波光子相位变换器微波光子相位变换器光子学是一种光子学.变量的时间延迟.

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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科学领域:

  • 光子学 是一个光子学.
  • 光学工程是指光学工程.
  • 集成光学 集成光学 集成光学

背景情况:

  • 光学全通波器 (APF) 对于没有振幅扭曲的相位操纵至关重要.
  • 高级APF提供更大的时间延迟和相位移,但仅限于级联的第一级设计,增加复杂性.
  • 现有的第一阶级APF通常基于有损的波导.

研究的目的:

  • 提出和演示一种新的二级光学全通波器 (APF).
  • 为了克服与级联第一阶级APF相关的复杂性和尺寸的局限性.
  • 为了实现显著的可调节时间延迟和光学信号处理的相位转移.

主要方法:

  • 使用在绝缘体平台制造二级APF.
  • 集成的马赫-泽恩德干扰仪辅助微波振器.
  • 在二级和一级APF功能之间重新配置的演示.

主要成果:

  • 通过使用二级APF,实现可调节的时间延迟从553到948ps,幅度变化<1.7dB.
  • 演示了一种微波光子相位变换器,可从0到3.27π调节相位变化,RF功率变化<2.4dB.
  • 将设备重新配置为一级APF,提供可调节的时间延迟从257到429ps,幅度变化小于0.9dB.

结论:

  • 拟议的二阶APF为高阶光学过提供了灵活而紧的解决方案.
  • 这项技术为操作光学信号提供了一种新的方法,具有增强的性能.
  • 该设备的可重新配置性质提高了它在各种光子应用中的实用性.