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Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
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Laser frequency stabilization using a commercial wavelength meter.

Luc Couturier1, Ingo Nosske1, Fachao Hu1

  • 1Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China.

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Summary
This summary is machine-generated.

A new laser frequency stabilization scheme using a solid Fizeau interferometer wavelength meter achieves high stability for cooling and trapping strontium atoms. This method offers precise laser control for atomic physics applications.

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Area of Science:

  • Atomic, Molecular, and Optical (AMO) Physics
  • Laser Physics and Spectroscopy

Background:

  • Precise laser frequency control is crucial for atomic spectroscopy, cooling, and trapping.
  • Existing methods may have limitations in stability, accuracy, or operational complexity.

Purpose of the Study:

  • To characterize a laser frequency stabilization scheme utilizing a novel wavelength meter.
  • To assess the performance of the stabilization scheme for cooling and trapping strontium atoms.

Main Methods:

  • Characterization of a wavelength meter based on solid Fizeau interferometers.
  • Implementation of a frequency stabilization loop for a frequency-doubled Ti-sapphire laser at 461 nm.
  • Evaluation of single-channel and multi-channel operation using a fiber switch.

Main Results:

  • Achieved an absolute Allan deviation below 10-9 with a 1 MHz standard deviation over 10 hours for the stabilized laser.
  • Demonstrated excellent stability in single-channel operation for cooling and trapping strontium atoms.
  • Observed correlations between atomic fluorescence fluctuations and laser frequency excursions in multi-channel operation.

Conclusions:

  • The Fizeau interferometer-based wavelength meter provides a robust scheme for laser frequency stabilization.
  • The scheme is effective for laser cooling and trapping of strontium atoms.
  • Potential applications extend to various atomic and molecular laser spectroscopy, cooling, and trapping experiments.