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相关概念视频

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

240
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
240
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

262
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
262

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相关实验视频

Updated: May 9, 2025

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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无模式多波长拉曼光纤激光器的模式结构演变.

Yanxin Li, Jiancheng Deng, Sergei K Turitsyn

    Optics letters
    |May 1, 2025
    PubMed
    概括

    研究人员使用萨格纳克循环镜 (SLM) 开发了一种无模多波长拉曼光纤激光器 (MRFL). 这种激光通过将纵向模式扩展到无模式状态来实现稳定的时间强度分布.

    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
    • 纤维激光器 纤维激光器

    背景情况:

    • 多波长拉曼纤维激光器 (MRFL) 对各种应用至关重要.
    • 激光射线的纵向模式结构直接影响激光辐射的时间性质.

    研究的目的:

    • 为了演示无模多波长拉曼光纤激光器 (MRFL).
    • 调查低反射的萨格纳克环镜 (SLM) 在实现无模状态和稳定的时间强度分布方面的作用.

    主要方法:

    • 在激光腔内使用低反射的萨格纳克循环镜 (SLM).
    • 分析不同功率的纵向模式结构的演变.

    主要成果:

    • 在低功率下,MRFL显示一个离散的多纵向模式结构.
    • 增加功率会导致模式扩大,重叠和脱节.
    • 低反射的SLM有效地促进过渡到无模式状态.
    • 无模的MRFL显示了一个高度稳定的时间强度分布.

    结论:

    • 介绍了一种基于低反射 SLM 的新型无模 MRFL 设计.

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    Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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    Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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  • SLM 便于控制纵向模式结构,从而提高时间稳定性.
  • 这项工作为多波长光纤激光器的稳定无模式运行提供了途径.