Digital PDH locking: A modern approach to laser frequency stabilization

Overview

The Pound-Drever-Hall (PDH) method is ubiquitous in fields requiring laser frequency stabilization, including atomic physics, spectroscopy, and precision measurement. But since PDH locking systems are traditionally assembled manually from various components, they often present challenges for researchers due to time constraints and adaptability issues, leading to maintenance difficulties and signal distortion.

In this presentation, we provide a pedagogical introduction to the PDH locking technique and create a system using reconfigurable, FPGA-based instrumentation. We combine multiple instruments, including the Moku Laser Lock Box, on a single device, to create a bespoke environment that emulates a real optical system. 

You’ll see how this digital-first approach simplifies the laser locking process while automating maintenance against disturbances and delivering higher-quality data. Expect to learn how an integrated approach enables:

• Instant tuning of control loop parameters on cascaded paths.
• Multiple preconfigured locking stages. 
• Instant, single-click locking. 

Together, the easy-to-use Moku software interface, suite of FPGA-based instruments, and powerful hardware provide flexible new ways to improve SNR, consolidate legacy test equipment, and significantly reduce time to innovation. The webinar includes a presentation, demonstration, and live Q&A session.

For expert tips on optimizing your PDH locking setup, performing RIN measurements, and determining the best FPGA-based Moku device for your research, check out our blog.

Webinar details

• Title: Digital PDH locking: A modern approach to laser frequency stabilization
  
• Date recorded: October 17, 2024
• Speaker: John Miller