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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Active stabilization of a diode laser injection lock.

Brendan Saxberg1, Benjamin Plotkin-Swing1, Subhadeep Gupta1

  • 1Department of Physics, University of Washington, P.O. Box 351560, Seattle, Washington 98195-1560, USA.

The Review of Scientific Instruments
|July 3, 2016
PubMed
Summary

This study introduces an electronic stabilization device for semiconductor diode laser optical injection locking. The method ensures robust, high-power laser output, simplifying applications like Ytterbium atom cooling.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Laser Technology
  • Quantum Optics

Background:

  • Optical injection locking is crucial for semiconductor diode lasers but sensitive to environmental and operational fluctuations.
  • Maintaining stable laser output power and mode purity is challenging in applications requiring high precision.

Purpose of the Study:

  • To develop and demonstrate an electronic stabilization device for semiconductor diode laser optical injection locking.
  • To enhance the robustness and reliability of injection-locked diode lasers.

Main Methods:

  • Utilized the peak height of a laser's transmission signal on a scanning Fabry-Perot cavity as a discriminator.
  • Implemented a two-component feedback algorithm adjusting diode current for optimal injection lock.
  • Tested the device on a 399 nm diode laser for Ytterbium atom cooling.

Main Results:

  • Successfully stabilized the optical injection lock of a semiconductor diode laser.
  • Demonstrated robustness against thermal drifts and fast recovery from beam occlusion.
  • Achieved and maintained maximum optical power in the injected mode.

Conclusions:

  • The developed electronic stabilization device significantly improves diode laser injection lock performance.
  • This technique reduces the need for extensive passive stabilization, benefiting various laser applications.
  • The method is particularly advantageous for systems employing multiple injection-locked diode lasers.