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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,...
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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

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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...
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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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Video Experimental Relacionado

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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Multiplexadores adicionales flexibles para la manipulación de modos utilizando intercambiadores de modos.

Yaxin Yu, Zhenzhao Guo, Lei Zhang

    Optics express
    |February 20, 2026
    PubMed
    Resumen

    Este estudio introduce un esquema de manipulación de modo compacto y flexible utilizando algoritmos inteligentes para sistemas de multiplexación por división de modo (MDM). El nuevo enfoque mejora la capacidad de interconexión óptica y ofrece escalabilidad para futuras comunicaciones ópticas de alta densidad.

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    Área de la Ciencia:

    • Fotónica y Ingeniería Óptica.
    • La óptica integrada es una óptica integrada.
    • Las comunicaciones ópticas de las comunicaciones ópticas.

    Sus antecedentes:

    • Los sistemas de multiplexación por división de modo (MDM, por sus siglas en inglés) requieren una manipulación de modo flexible para las interconexiones ópticas avanzadas.
    • Los sistemas MDM actuales se enfrentan a limitaciones en el acceso a modos específicos de orden bajo dentro de las guías de onda multimodo.

    Objetivo del estudio:

    • Demostrar un esquema de manipulación de modo compacto y flexible para sistemas MDM.
    • Desarrollar y verificar experimentalmente los intercambiadores de modo (ME) y los multiplexadores de modo agregado (MADM) utilizando algoritmos inteligentes.
    • Proporcionar una estrategia escalable para manipular modos de orden superior en las comunicaciones ópticas.

    Principales métodos:

    • Diseño y optimización de intercambiadores de modos (EM) utilizando algoritmos inteligentes.
    • Fabricación y caracterización experimental de dispositivos ME y MADM basados en guías de onda de perfil de curva de Bézier.
    • Análisis de las pérdidas de inserción (IL), del crosstalk (CT) y de los rangos de longitudes de onda operativas.

    Principales resultados:

    • Los dispositivos ME fabricados (ME01/23, ME02/13, ME03/12) lograron IL por debajo de 1,8 dB y CT mejor que -10 dB en amplios rangos de longitud de onda.
    • Los MADM demostraron IL por debajo de 2.4 dB y CT superior a -10.0 dB dentro de la banda C.
    • Todos los dispositivos exhibieron una huella compacta (< 6 × 3 μm2).

    Conclusiones:

    • El esquema propuesto ofrece una manipulación de modo eficiente y flexible para los sistemas MDM.
    • La tecnología supera las limitaciones en el acceso a modos específicos de orden inferior, permitiendo la escalabilidad de modos de orden superior.
    • Este trabajo sienta las bases para la próxima generación de sistemas de comunicación óptica de alta densidad.