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相关概念视频

Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

592
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
592

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相关实验视频

Updated: Jul 1, 2025

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
15:04

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两光子卢比时钟检测到776nm光的光.

River Beard, Kyle W Martin, John D Elgin

    Optics express
    |March 5, 2024
    PubMed
    概括

    研究人员使用两光子过渡开发了一个紧的鲁比光学原子钟. 这个新的时钟通过检测776nm光来稳定,并使用多像素光子计数器来提高可移植性.

    科学领域:

    • 原子,分子和光学物理学
    • 计量学和测量科学 计量学和测量科学

    背景情况:

    • 光学原子钟提供了高精度的计时.
    • 开发紧和便携式原子钟对于下一代应用至关重要.
    • 卢比原子钟是可制造,小尺寸,重量和功率 (SWaP) 设备的候选者.

    研究的目的:

    • 报告第一个通过检测776nm光稳定的双光子钟.
    • 为了证明使用多像素光子计数器 (MPPC) 作为原子钟反环中的光倍增管 (PMT) 的低压替代品.

    主要方法:

    • 使用776nm光检测稳定一个双光子原子钟.
    • 将多像素光子计数器 (MPPC) 集成到时钟激光器的反循环中.
    • 用MPPC系统对时钟的性能进行表征.

    主要成果:

    • 成功实现了两光子钟的成功实施.
    • 演示776nm光检测用于时钟稳定.
    • 验证MPPC作为PMT可行的低压替代方案,用于时钟激光反.

    结论:

    • 开发的双光子钟是便携式,可制造的计时解决方案的有希望的候选人.

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  • 使用MPPC提供了一条通往更小,更节能的原子钟的道路.
  • 这项工作推动了下一代光学原子钟的开发,其SWaP减少.