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相关概念视频

UV–Vis Spectroscopy: Beer–Lambert Law01:09

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The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The...
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Bandpass Sampling01:17

Bandpass Sampling

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In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
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UV–Vis Spectrum01:30

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When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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在基于多模光纤的吸收器中带宽诱导的和.

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    此摘要是机器生成的。

    多模式纤维和吸收器可以产生超快的激光脉冲. 新的发现表明,非线性相互作用和波长依赖的传输,而不仅仅是跨式非线性,是它们功能的关键.

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    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
    • 非线性光学是非线性光学.

    背景情况:

    • 多模式纤维 (MMF) 和吸收器对于模式锁定激光器至关重要,使得超快脉冲产生成为可能.
    • 以前的研究集中在连续波 (CW) 分析上,主要将和吸收归因于横向模式之间的非线性相互作用.

    研究的目的:

    • 调查基于MMF的设备中和吸收背后的机制.
    • 确定单模光纤 (SMF) 非线性和MMF波长依赖传输的作用.
    • 评估CW分析对长期货币市场基金的充分性.

    主要方法:

    • 基于货币货币基金的和吸收器的实验调查.
    • 分析非线性相互作用和波长依赖的线性传输.
    • 将CW极限分析与不同长度的MMF实验结果进行比较.

    主要成果:

    • 通过SMF非线性和MMF波长依赖的线性传输实现和吸收,即使具有最小的跨式非线性.
    • 在CW分析中发现,对于长期的货币市场基金来说,这还不够,即使当跨式联运非线性是显著的.
    • 证明了货币市场基金和吸收的新机制.

    结论:

    • 货币货币基金的和吸收器的机制比以前想象的要复杂得多,涉及到小型货币基金的非线性和货币货币基金的传输特性.
    • 了解这些机制对于推进超快激光技术至关重要.
    • 开辟了开发超高速光学控制的新型可编程设备的途径.