Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

85
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...
85
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

98
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...
98
Gain01:15

Gain

181
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
181
Molecular Orbital Theory I02:35

Molecular Orbital Theory I

32.1K
Overview of Molecular Orbital Theory
32.1K
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

171
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...
171
Properties of Fourier Transform II01:24

Properties of Fourier Transform II

218
The Fourier Transform (FT) is an essential mathematical tool in signal processing, transforming a time-domain signal into its frequency-domain representation. This transformation elucidates the relationship between time and frequency domains through several properties, each revealing unique aspects of signal behavior.
The Frequency Shifting property of Fourier Transforms highlights that a shift in the frequency domain corresponds to a phase shift in the time domain. Mathematically, if x(t) has...
218

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

A multi-branched EMS mutant of Isodon lophanthoides var. graciliflorus exhibits significant differences in phytohormones and diterpenoids.

BMC plant biology·2026
Same author

Sunlight-Driven Olefin Epoxidation via a Bromide Radical-Mediated Process.

Journal of the American Chemical Society·2026
Same author

Wavelength-responsive in situ redox chemistry enables stable CO<sub>2</sub> photocatalysis.

Nature communications·2026
Same author

Pavlov's experiment-inspired optical neural networks based on dual-color fluorescence switching effect.

National science review·2026
Same author

Intrinsic distributed sensing using wavelength-multiplexed QPSK signals in fiber-optic communication.

Optics express·2026
Same author

Warm-start or cold-start? A comparison of generalizability in gradient-based hyperparameter tuning.

Neural networks : the official journal of the International Neural Network Society·2026
Same journal

Long-term stabilization of intensity-difference squeezing from four-wave mixing in rubidium vapor.

Optics express·2026
Same journal

Robust 3D topography measurement of large-range high-aspect-ratio structures based on dual-domain statistical filtering in SD-OCT.

Optics express·2026
Same journal

Broadband transmissive terahertz metasurface for simultaneous quad-mode OAM multiplexing.

Optics express·2026
Same journal

Leveraging two-dimensional materials for high-sensitivity optical sensors: quasi-bound states in the continuum within hybrid metasurfaces.

Optics express·2026
Same journal

Resolution investigation for dual-spherical-wave optical scanning holographic microscopy: methods and performance.

Optics express·2026
Same journal

Robustness of parallel subnetwork-filtered diffractive deep neural networks.

Optics express·2026
查看所有相关文章

相关实验视频

Updated: Jul 6, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.8K

基于高阶轨道角动量模式的相位移关键通信,使用相位差调制.

Jiafu Chen, Zebin Huang, Peipei Wang

    Optics express
    |January 5, 2024
    PubMed
    概括
    此摘要是机器生成的。

    轨道角动量 (OAM) 模式通信面临着局限性. 一个新的相差调制策略可指数地提高调制顺序,以高精度实现超高顺序转换键 (SK).

    更多相关视频

    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

    9.0K
    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
    14:18

    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

    Published on: February 28, 2016

    11.4K

    相关实验视频

    Last Updated: Jul 6, 2025

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
    08:39

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

    Published on: January 28, 2019

    9.8K
    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

    9.0K
    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
    14:18

    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

    Published on: February 28, 2016

    11.4K

    科学领域:

    • 光学通信是指光学通信的应用.
    • 量子信息科学是一种量子信息科学.

    背景情况:

    • 轨道角动量 (OAM) 模式为高阶转键 (SK) 通信提供直角性.
    • 叠加OAM模式受到模式场不匹配和分歧的限制.

    研究的目的:

    • 为了克服基于OAM的SK调制订单限制.
    • 引入一种新的相差调制策略,以提高通信能力.

    主要方法:

    • 提出了一个相差调制策略,引入相差自由度 (DoF).
    • 利用模式干扰对可调节参数相位差异的灵敏度.
    • 通过在叠加的OAM模式中操纵干扰状态来生成可编码的空间模式.

    主要成果:

    • 通过使用仅3种OAM模式,实现了超高阶相位转换键 (PSK) 的调制顺序高达4x10^4.
    • 证明了99.9%的解码准确度.
    • 由于OAM和相差DoF的独立性,可编码模式呈指数级增长.

    结论:

    • 相差调制策略有效地打破了基于OAM的SK调制顺序限制.
    • 这种方法可以实现超高阶的PSK通信.
    • 进一步增加OAM模式可以指数地提高通信能力.