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相关概念视频

What is a Mode?01:07

What is a Mode?

20.3K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
20.3K
Ion Exchange01:17

Ion Exchange

1.6K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.6K
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

1.9K
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.
1.9K
Switching of BJT01:22

Switching of BJT

982
Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
982
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

1.1K
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
1.1K
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

1.2K
Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
1.2K

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相关实验视频

Updated: May 4, 2026

Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

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使用模式交换器进行模式操纵的灵活添加-丢弃多重复合器.

Yaxin Yu, Zhenzhao Guo, Lei Zhang

    Optics express
    |February 20, 2026
    PubMed
    概括

    本研究介绍了一种紧的,灵活的模式操纵方案,使用智能算法来实现模式划分多重复合 (MDM) 系统. 新方法提高了光学互连能力,并为未来的高密度光学通信提供了可扩展性.

    科学领域:

    • 光子学和光学工程 光子学和光学工程
    • 集成光学 集成光学 集成光学
    • 光学通信是指光学通信.

    背景情况:

    • 模式划分多重复合 (MDM) 系统需要灵活的模式操纵来实现先进的光学互连.
    • 当前的MDM系统在多模波导中访问特定的低级模式时面临限制.

    研究的目的:

    • 为MDM系统展示一个紧而灵活的模式操纵方案.
    • 使用智能算法开发和实验验证模式交换器 (ME) 和模式添加掉落多重复合器 (MADM).
    • 提供一个可扩展的策略来操纵光通信中的更高阶模式.

    主要方法:

    • 使用智能算法设计和优化模式交换器 (ME).
    • 基于贝齐尔曲线形状波导的ME和MADM设备的制造和实验性表征.
    • 插入损失 (IL),交叉声 (CT) 和操作波长范围的分析.

    主要成果:

    • 制造的ME设备 (ME01/23,ME02/13,ME03/12) 在广泛的波长范围内实现了低于1.8dB的IL和比-10dB更好的CT.
    • 在C频段内,MADM显示IL低于2.4dB,CT超过-10.0dB.
    • 所有设备都显示出一个紧的足迹 (<6 × 3 μm2).

    更多相关视频

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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    相关实验视频

    Last Updated: May 4, 2026

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
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    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

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    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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    结论:

    • 拟议的方案为MDM系统提供了高效和灵活的模式操作.
    • 该技术克服了访问特定低级模式的局限性,使得高级模式可扩展.
    • 这项工作为下一代高密度光通信系统奠定了基础.