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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
Switching of BJT01:22

Switching of BJT

406
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...
406

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相关实验视频

Updated: Jun 24, 2025

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
08:48

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

Published on: November 22, 2019

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单频轨道角动量可从微芯片激光器切换模式.

Chen Li, Ziyu Hua, Qing Wang

    Optics letters
    |June 2, 2024
    PubMed
    概括

    我们开发了一种紧的激光器,可以在1μm波长下产生可切换的单频轨道角动量 (OAM) 模式. 这种多功能OAM源实现了各种模式的高保真性,推进了光学技术.

    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

    背景情况:

    • 轨道角动量 (OAM) 模式为光学应用提供了独特的特性.
    • 有效地生成可切换,单频OAM模式仍然是一个挑战.

    研究的目的:

    • 展示一种用于直接生成单频可切换OAM模式的新方法.
    • 开发一个紧的和多功能OAM激光源.

    主要方法:

    • 使用一个Nd:YVO4微芯片激光器,在1μm波长运行.
    • 使用轴子和镜头将808nm激光二极管光束塑成环形形状.
    • 调整了束参数,以控制OAM模式的振荡和音量.

    主要成果:

    • 成功生成了单频可切换OAM模式 (delay±1>和delay±2>),其保真度超过96%.
    • 通过调整环状束的直径和功率来调整OAM模式的能力.
    • 由于微芯片激光器的短腔,实现了单频输出.

    结论:

    • 介绍了一种紧而通用的单频OAM激光源.
    • 开发的技术在古典和量子光子学中有潜在的应用.

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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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    Last Updated: Jun 24, 2025

    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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  • 这项工作为先进的光通信和传感系统铺平了道路.