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相关概念视频

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

335
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...
335

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相关实验视频

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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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多种模式操作光纤激光模式 - - 通过非线性多模式干扰锁定非线性多模式干扰.

Gang Deng, Qiaochu Yang, Silun Du

    Optics express
    |March 5, 2024
    PubMed
    概括

    研究人员开发了一种新的光纤激光器,使用非线性多模干扰和吸收器来产生五种不同的脉冲模式. 这种多功能激光技术对超快速光子应用具有前景.

    科学领域:

    • 光学和光子学 在光学和光子学.
    • 激光物理 激光物理
    • 材料科学 材料科学 材料科学

    背景情况:

    • 模式锁定激光器对于超快光学至关重要.
    • 开发多功能和吸收器是控制激光动态的关键.
    • 非线性多模干扰提供了独特的光物质相互作用可能性.

    研究的目的:

    • 为了演示一个全纤维被动模式锁定激光器与一个新的和吸收器.
    • 为了研究使用这种激光生成多个脉冲模式.
    • 探索超快光子学中非线性多模干扰和吸收器的潜力.

    主要方法:

    • 使用了一种非线性多模干扰和吸收器,由分级索引多模纤维构建.
    • 在全纤维,被动模式锁定配置中操作激光器.
    • 在没有外部过器的情况下,在不同的分散模式中研究脉冲生成.

    主要成果:

    • 成功生成了五种不同的脉冲模式:消散性单子,Q开关矩形脉冲,消散性单子共振,类似噪声的脉冲和明暗脉冲对.
    • 具有高脉冲能量 (1.15 nJ),宽带宽 (17.98 nm) 和短持续时间 (2.78 ps) 的消耗性单子的特征.
    • 观察到显著的脉冲持续时间和能量消耗性单子共振 (5.21 ns,4.53 nJ) 和类似噪声的脉冲 (48.06 ns,5.12 nJ).

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    结论:

    • 开发的非线性多模干扰和吸收器使光纤激光器中的多功能脉冲产生成为可能.
    • 激光系统在产生各种脉冲格式方面表现出灵活性,包括复杂的明亮-黑暗脉冲对.
    • 混合分级索引多模式纤维和吸收器提供了可扩展性和简单性,使其对超高速光子学具有吸引力.