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Microcontroller based scanning transfer cavity lock for long-term laser frequency stabilization.

S Subhankar1, A Restelli1, Y Wang1

  • 1Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, College Park, Maryland 20742, USA.

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Summary
This summary is machine-generated.

We developed a digital scanning transfer cavity lock (STCL) for stable laser frequencies. This system corrects for environmental changes, achieving high accuracy for laser stabilization and atomic transition interrogation.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Laser Physics and Technology
  • Digital Control Systems

Background:

  • Long-term laser frequency stabilization is crucial for precision measurements.
  • Environmental factors can cause significant laser frequency drifts.
  • Existing methods may lack compactness or dynamic range.

Purpose of the Study:

  • To present a compact, all-digital implementation of a scanning transfer cavity lock (STCL).
  • To achieve long-term laser frequency stabilization with environmental drift correction.
  • To enable accurate interrogation of atomic transitions using a dynamically scanning laser.

Main Methods:

  • An interrupt-driven state machine was employed for STCL control.
  • Real-time environmental data was used to correct slave laser frequency drifts.
  • Demonstrated dynamic scanning of the slave laser while maintaining frequency lock.

Main Results:

  • Achieved an accuracy of 0.9 MHz for laser frequency stabilization.
  • Demonstrated successful correction of frequency drifts caused by environmental changes.
  • Validated the capability for wide-range dynamic frequency scanning with stable lock.

Conclusions:

  • The compact, all-digital STCL offers robust long-term laser frequency stabilization.
  • The system effectively compensates for environmental perturbations.
  • This technology enables precise atomic transition studies through dynamic laser tuning.