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相关概念视频

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

323
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...
323
Power System Distribution01:25

Power System Distribution

234
Power system distribution involves delivering electrical energy from power plants to consumers through a network of transmission and distribution systems. The process begins at power plants, where energy from coal, gas, nuclear, water, and wind is converted into electrical energy. These plants use three-phase generators, typically rated between 50 to 1300 MVA, with terminal voltages ranging from a few kV to 20 kV, depending on the size and age of the units.
The transmission system is designed...
234
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

345
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...
345
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

133
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
133

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相关实验视频

Updated: Jun 24, 2025

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

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模式选择性功率分割器用于模式分割多重复合光学网络.

Yuyang Gao, Jian Cui, Xian Zhou

    Optics express
    |June 11, 2024
    PubMed
    概括
    此摘要是机器生成的。

    我们开发了一种全光纤模式选择性功率分离器 (MSPS) 的新产品,用于模式分区复杂化网络中的多发射. 该设备为非圆形对称的LP模式提供稳定,任意分割比,增强光学性能监控.

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    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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    相关实验视频

    Last Updated: Jun 24, 2025

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    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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    科学领域:

    • 光学工程是指光学工程.
    • 光子学 是一个光子学.
    • 电信 电信服务 电信服务 电信服务

    背景情况:

    • 模式划分多重复合 (MDM) 网络通过利用多个空间模式实现更高的数据容量.
    • 有效的模式操纵对于MDM系统中的多播和监控等高级功能至关重要.
    • 现有的选择模式设备往往缺乏稳定性或灵活性,以适应非圆形对称模式.

    研究的目的:

    • 为非圆对称的LP模式提出和演示一个全纤维模式选择性功率分割器 (MSPS).
    • 为了实现独立于输入模式定向的任意功率分割比率.
    • 为了提高MDM应用的模式选择性合器的稳定性和性能.

    主要方法:

    • 对MSPS运行的三个关键条件的理论分析.
    • 设计不对称的双核少模式定向合器,使用少模式和双模式纤维.
    • 对LP31MSPS的数值模拟,使用各种分裂比.
    • 90/10 LP31 MSPS的制造,采用缩和抛光技术.

    主要成果:

    • 证明了核心至核心距离和合长度控制任意分裂比.
    • 确认不对称结构确保了目标LP模式的选择性功率分割.
    • 与传统设备相比,制造的LP31MSPS表现出明显改善的分裂比稳定性.

    结论:

    • 拟议的全光纤MSPS是MDM网络中多发射和光学性能监控的可行解决方案.
    • 该设备的设计允许在非圆形对称的LP模式中实现灵活和稳定的功率分割.
    • 这一进步有助于更高容量的光通信系统的实际实施.