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関連する概念動画

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...
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関連する実験動画

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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モード交換器を使用したモード操作のための柔軟なアドドロップマルチプレクサー.

Yaxin Yu, Zhenzhao Guo, Lei Zhang

    Optics express
    |February 20, 2026
    PubMed
    まとめ

    この研究は,モード分割複合 (MDM) システムのためのインテリジェントアルゴリズムを使用して,コンパクトで柔軟なモード操作スキームを導入します. この新しいアプローチは,光学相互接続能力を向上させ,将来の高密度光通信のスケーラビリティを提供します.

    科学分野:

    • フォトニクスと光学工学
    • インテグレーテッド光学 (Integrated Optics) とは
    • オプティカル・コミュニケーションズ (OPC)

    背景:

    • モード分割マルチプレキシング (MDM) システムは,高度な光学相互接続のために柔軟なモード操作を必要とします.
    • 現在のMDMシステムは,マルチモード波導体内の特定の低次元のモードにアクセスする際の制限に直面しています.

    研究 の 目的:

    • MDMシステムのコンパクトで柔軟なモード操作スキームを実証する.
    • インテリジェントアルゴリズムを使用してモード交換器 (MEs) とモードアドドロップマルチプレクサー (MADMs) を開発し,実験的に検証する.
    • 光通信における上級モードの操作のためのスケーラブルな戦略を提供すること.

    主な方法:

    • インテリジェントアルゴリズムを用いたモード交換器 (MEs) の設計と最適化.
    • ベジエの曲線プロフィール波導体に基づくMEおよびMADMデバイスの製造と実験的特徴付け.
    • 挿入損失 (IL),クロストーク (CT),および動作波長範囲の分析.

    主要な成果:

    • 製造されたME装置 (ME01/23,ME02/13,ME03/12) は,幅広い波長範囲でILを1.8dB未満,CTを-10dB以上を達成しました.

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    関連する実験動画

    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
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    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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  • MADMでは,C帯内でILが2.4dB未満とCTが-10.0dBを超えるC帯でILを示した.
  • すべてのデバイスは,コンパクトな足跡 (<6 × 3 μm2) を示した.

    • 結論:

    • 提案されたスキームは,MDMシステムの効率的かつ柔軟なモード操作を提供します.
    • この技術は,特定の低次元のモードへのアクセスにおける制限を克服し,高次元のモードのスケーラビリティを可能にします.
    • この研究は,次世代の高密度光通信システムの基礎を築く.