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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
4.0K

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相关实验视频

Updated: Apr 30, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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槽式基于波导,极化不敏感,热光学相移器.

WenKang Wang, YanFeng Zheng, JiaWang Feng

    Optics letters
    |February 28, 2025
    PubMed
    概括

    使用垂直槽波导的光子相变换器实现了极化不敏感的操作. 这一突破使双极化光学开关具有最小的功率差异,提高光子设备的性能.

    科学领域:

    • 光子学 是一个光子学.
    • 材料科学 材料科学 材料科学
    • 电气工程 电气工程

    背景情况:

    • 热光学 (TO) 相位变换器对于光学切换至关重要.
    • 在光子学中实现极化不敏感仍然是一个挑战.
    • 垂直槽波导提供独特的模式限制特性.

    研究的目的:

    • 提出和演示极化不敏感的热光相变换器.
    • 为设计用于双极化操作的光子设备.
    • 为了使极化独立的光学开关.

    主要方法:

    • 设计垂直槽波导以对 TE 和 TM 模式等同 TO 系数.
    • 通过测量MZI光学开关中的电开关功率来表征TO系数.
    • 实验验证开发的双极化光学开关的性能.

    主要成果:

    • 工程槽波导设计实现了TE0和TM0模式的几乎相同的TO系数.
    • 在两种极化模式之间观察到的切换功率差异小于0.3%.
    • 开发的光学交换机表现出强大的极化独立性能.

    结论:

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    • 垂直槽波导对于创建极化不敏感的TO相移器是有效的.
    • 拟议的相位转换器显示出实现极化独立光子开关的巨大潜力.
    • 这项工作推动了高性能,极化无极光子集成电路的开发.