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相关概念视频

Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

148
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
148
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

137
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
137
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

226
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
226

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Updated: Sep 11, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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具有低随机相位误差的12通道局域网波长分割多重处理器.

Zixu Xu, Dongyue Sun, Jingyu Zhao

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    概括
    此摘要是机器生成的。

    研究人员开发了一种12通道化波长分裂多重复合器 (WDM),其相位误差显著减少. 这一进步提高了光通信容量和性能,无需校准.

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    科学领域:

    • 光子学和光学工程 光子学和光学工程
    • 材料科学 材料科学 材料科学

    背景情况:

    • 波长分割复杂化 (WDM) 对于高容量的光通信至关重要.
    • 化 (SiN) 由于其低的热光系数和透明度,为光子集成电路提供了优势.

    研究的目的:

    • 在化平台上演示一个12通道的WDM设备.
    • 为了最大限度地减少马赫-泽恩德干扰仪的随机相位误差,以提高设备性能.
    • 展示化在先进光通信组件中的潜力.

    主要方法:

    • 在300纳米厚的化平台上使用马赫-泽恩德干扰仪制造12通道的WDM.
    • 对干扰仪中的相位误差贡献者的详细分析.
    • 实施有针对性的结构优化,以减轻相位错误.

    主要成果:

    • 实现了70%的随机相位错误减少.
    • 显示出卓越的设备性能: -0.87dB插入损失, -17dB交叉声和2.3nm 1-dB带宽.
    • 观察到高的制造公差 (22 pm/nm) 和优异的芯片内和芯片间可重复性.
    • 由于化的特性,估计低温依赖的中心波长转移 (11 pm/K).

    结论:

    • 开发的化WDM表现出卓越的性能和可重复性.
    • 结构优化有效地减少相位错误,增强设备的功能.
    • 这项工作强调化是高容量,被动光通信设备的有希望的材料.