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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Updated: Jul 3, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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广角非均光学相位阵列采用紧和高效的天线设计.

Omar E Elsheikh1, Mohamed A Swillam2

  • 1Nanophotonics Research Laboratory, Department of Physics, The American University in Cairo, New Cairo Avenue, 11835, Cairo Governorate, Egypt. omarelsheikh@aucegypt.edu.

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|February 15, 2024
PubMed
概括
此摘要是机器生成的。

研究人员为LIDAR开发了高效的光学天线,通过非统一的阵列和遗传算法优化实现了160°的转向范围. 这克服了以前在方向盘范围和分辨率之间进行的权衡.

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科学领域:

  • 光子学是指光子学的使用方法.
  • 光学工程是指光学工程.
  • 天线设计天线设计

背景情况:

  • 光学相位阵列 (OPA) 对激光雷达至关重要,但在转向范围和分辨率之间经常面临权衡.
  • 化格天线提供效率,紧性和宽光束,与光子学兼容.
  • 不统一的光学相位阵列显示了增强方向盘范围和分辨率的希望.

研究的目的:

  • 提供高效的光学天线,克服当前OPA系统的局限性.
  • 为了实现用于LIDAR应用的高分辨率的宽方向光.
  • 为了证明一个紧而高效的OPA解决方案与CMOS光子学兼容.

主要方法:

  • 设计和制造了两个高效的光学天线.
  • 使用一个二维的非均阵列 (10x10元件) 来增强光束方向.
  • 使用遗传算法优化数组元素位置.

主要成果:

  • 在中心频率实现了94%和93.5%的上升功率效率.
  • 获得了宽的全宽半最大光束配置 (例如,8.88° x 78.05°).
  • 证明了宽带宽 (1400-1700nm) 在S,C和L频段的效率>80%.
  • 实现了一个无别名的阵列,其转向范围为160°,光束宽度为0.5°,侧叶水平为-11dB.

结论:

  • 开发的光学天线在效率和光束转向方面显著超过了最先进的性能.
  • 由遗传算法优化的非统一阵列设计有效地扩大了方向盘范围,同时保持了分辨率.
  • 这项工作为小型,高效的OPA提供了一个可行的解决方案,为LIDAR和其他应用程序提供了广泛的转向能力.