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相关概念视频

Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

76
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
76

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相关实验视频

Updated: Jun 5, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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可编程λ/2-pitch光学相位阵列的优化

Ankita Sharma1,2, John N Straguzzi1, Tianyuan Xue1,2

  • 1Max Planck Institute of Microstructure Physics, Halle (Saale), Germany.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
概括

我们开发了一种启发式优化方法,以改善光学相位阵列 (OPA) 中的单叶辐射. 这种技术可以纠正光学非理想性,提高光束质量,用于无别名的外平面发射应用.

关键词:
交叉语音 交叉语音 交叉语音 交叉语音 交叉语音光学相位阵列是一种光学相位阵列.优化的优化优化优化.可编程光子学是可以编程的.光子学是一种光子学.

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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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相关实验视频

Last Updated: Jun 5, 2025

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科学领域:

  • 光子学 是一个光子学.
  • 集成光学 集成光学 集成光学
  • 光学工程是指光学工程.

背景情况:

  • 在光学相位阵列 (OPA) 中实现单叶辐射是具有挑战性的,因为发射器的距离密集,以及光学交叉声.
  • 制造变化和波导间交叉声降低了OPA的性能,限制了它们的实际应用.

研究的目的:

  • 提出和验证一个启发式优化方法用于OPAs中的振幅和相位控制.
  • 为了减轻光学非理想性,并通过抑制侧叶实现单叶辐射.

主要方法:

  • 启发性优化了光学集成电路中每个格子天线的振幅和相位.
  • 采用1毫米长的网格,距离775纳米,可在1450-1650纳米波长范围内工作.
  • 在广的视野 (FOV) 上评估了二维 (2D) 梁转向性能.

主要成果:

  • 在127° × 47°的FOV范围内,实现了110° × 28°的广泛的2D光束转向范围.
  • 显示了8.2dB的平均侧叶抑制,将34.5%的功率集中到主叶.
  • 达到 14.5 dB 的侧叶抑制峰值,主叶的功率为 50%.

结论:

  • 启发式优化方法有效地纠正了OPA中的光学非理想性.
  • 这种方法可以实现无别名的外平面发射,适合先进的光子应用.
  • 这种技术在密集的发射器阵列中显著提高了光束质量和功率度.