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相关概念视频

Open and closed-loop control systems01:17

Open and closed-loop control systems

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Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
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Updated: Sep 13, 2025

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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一个多循环自动锁定系统与超稳定激光的全数字电子.

Can Xia1,2,3, DanYang Zhu1,2,3, Yaodong Hu1,2,3

  • 1Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China.

The Review of scientific instruments
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概括
此摘要是机器生成的。

一个新的数字自动锁定系统通过集成多个控制循环来增强超稳定激光器 (USL). 该系统实现了高频稳定性和快速重新锁定,满足了苛刻的USL应用要求.

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科学领域:

  • 激光物理 激光物理
  • 光学工程是指光学工程.
  • 数字电子数字电子数字电子

背景情况:

  • 超稳定激光器 (USL) 需要复杂的多循环系统来实现高性能.
  • 现有的系统通常依赖于模拟电子,限制了集成和灵活性.

研究的目的:

  • 展示一个高度集成的,全数字的自动锁定系统,用于USLs.
  • 为了提高USL频率控制的稳定性,可靠性和自动化.

主要方法:

  • 使用现场可编程门阵列 (FPGA) 实现多循环自动锁定系统.
  • 集成高速模拟到数字和数字到模拟转换器,用于精确的控制.
  • 使用数字伺服控制用于Pound-Drever-Hall (PDH),光纤噪声消除 (FNC) 和光功率稳定 (LPS) 循环.

主要成果:

  • 为快速反循环实现了1.3MHz的全数字开放循环带宽.
  • 在载体锁定模式下显示的频率不稳定性为1.5 × 10-15 (1秒),在偏移锁定模式下显示的频率不稳定性为2.5 × 10-15 (1秒).
  • 据报道,75 dB (FNC) 和40 dB (LPS) 的噪声抑制在1 Hz.

结论:

  • 数字自动锁定系统成功稳定了激光频率,并证明了快速重新锁定 (<10秒).
  • 该系统的数字性质对频率不稳定性 (1秒内2.9×10-16) 的贡献最小.
  • 这种灵活可靠的数字系统满足了高级USL应用的严格要求.