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Confocal Fluorescence Microscopy01:16

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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相关实验视频

Updated: May 6, 2026

Quasi-light Storage for Optical Data Packets
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一个连续波拉曼激光器.

Haisheng Rong1, Richard Jones, Ansheng Liu

  • 1Intel Corporation, 2200 Mission College Blvd, CHP3-109, Santa Clara, California 95054, USA. haisheng.rong@intel.com

Nature
|February 18, 2005
PubMed
概括
此摘要是机器生成的。

研究人员通过减少非线性光学损失开发了一种连续波拉曼激光器. 这一突破克服了光子学的一个主要障碍,为先进的光电子设备提供稳定,可调节的激光输出.

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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
  • 半导体物理 半导体物理

背景情况:

  • 的间接带隙限制了光发射效率,这给基于的光子学带来了挑战.
  • 刺激拉曼散射已经使激光成为可能,但由于非线性光学损失,它以前仅限于脉冲操作.

研究的目的:

  • 为了展示一个连续波 (CW) 拉曼激光器.
  • 为了克服波导体中二光子吸收 (TPA) 诱导的自由载体吸收 (FCA) 的局限性.

主要方法:

  • 在波导体中集成了一个反偏向的p-i-n二极管,以减轻TPA诱导的FCA.
  • 在波导面上使用多层介电薄膜来形成激光腔.
  • 用于激发光放大和激光的拉曼散射.

主要成果:

  • 实现了稳定的单模式激光输出,侧模式抑制超过55dB.
  • 证明了小于80 MHz的狭窄线宽.
  • 观察到激光值取决于p-i-n反向偏差电压和激光波长.

结论:

  • 成功演示了第一个连续波拉曼激光器.
  • 整合一个反偏向的p-i-n二极管有效地减少了中的非线性光学损失.
  • 这一进步是基于的光电子学和集成光学领域的一个重要里程碑.