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A simple laser locking system based on a field-programmable gate array.

N B Jørgensen1, D Birkmose1, K Trelborg1

  • 1Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark.

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Summary
This summary is machine-generated.

We developed a simple, user-friendly digital laser frequency stabilization system using a field-programmable gate array (FPGA). This FPGA-based system offers precise laser locking for scientific applications like atom trapping.

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Area of Science:

  • Atomic, Molecular & Optical Physics
  • Laser Physics & Photonics
  • Control Systems Engineering

Background:

  • Laser frequency stabilization is vital for precision scientific and industrial tasks.
  • Digital electronics, particularly field-programmable gate arrays (FPGAs), are increasingly replacing analog systems for laser stabilization.

Purpose of the Study:

  • To develop a hardware-simplified, user-friendly digital laser frequency stabilization system.
  • To provide a cost-effective and efficient alternative to commercial and existing custom-built solutions.

Main Methods:

  • Implemented frequency modulation, lock-in detection, and a proportional-integral-derivative controller on an FPGA.
  • Minimized additional electronic components for a streamlined design.
  • Integrated a host-computer interface for comprehensive remote control.

Main Results:

  • Achieved a laser linewidth of 0.7 ± 0.1 MHz.
  • Demonstrated a fast settling time of 10 ms.
  • Verified performance comparable to existing laser systems used in atom trapping and cooling.

Conclusions:

  • The developed FPGA-based system offers a simple, efficient, and user-friendly solution for laser frequency stabilization.
  • The system's performance meets the demanding requirements of advanced applications such as atom trapping and cooling.
  • This digital approach represents a significant advancement over traditional analog stabilization methods.