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相关概念视频

IR Spectrometers01:25

IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
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在瓦特级别的超相稳定红外光源.

Simon Reiger, Mikhail Mamaikin, Dmitrii Kormin

    Optics letters
    |February 15, 2024
    PubMed
    概括

    研究人员开发了一种新的红外激光源,用于研究光物质相互作用. 这种新系统提供了高功率和特殊的波形稳定性,不需要复杂的稳定,从而实现了先进的应用.

    科学领域:

    • 激光物理和光子学 激光物理和光子学
    • 超快的光学 超快的光学
    • 非线性光学是非线性光学.

    背景情况:

    • 超短的红外脉冲对于光物质相互作用研究至关重要.
    • 传统的方法,如多阶段参数放大,与波形稳定性作斗争.
    • 活动稳定系统增加了高能红外脉冲生成的复杂性.

    研究的目的:

    • 开发一个稳定的,高功率的红外激光源在1.8微米.
    • 克服现有产生超短红外脉冲的方法的局限性.
    • 为了实现先进的应用,如子周期脉冲合成.

    主要方法:

    • 采用了1.03微米的用伊特添加伊特花 (Yb:YAG) 薄盘激光技术.
    • 采用混合两阶段的光谱扩展方案.
    • 在单个非线性晶体内实现的脉冲内差频率生成.

    主要成果:

    • 产生了以1.8微米为中心的红外脉冲,具有瓦特级平均功率.
    • 实现了低于20mrad的被动载体外相稳定性.
    • 证明了中央波长的广泛可调性.
    • 产生了一个跨越500nm到2.5μm的多八度连续.

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    Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
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    结论:

    • 开发的单晶非线性方法为高功率红外脉冲产生提供了更简单,更稳定的替代方案.
    • 该系统的被动稳定性和可调性与先进的振荡器相当.
    • 这种激光源为具有前所未有的波形稳定性的子周期脉冲合成铺平了道路.