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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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Phase-locked scanning interferometer for frequency stabilization of multiple lasers.

Alexei A Tonyushkin1, Adam D Light, Michael D Di Rosa

  • 1Los Alamos National Laboratory, Chemistry Division, MS J567, Los Alamos, New Mexico 87545, USA.

The Review of Scientific Instruments
|January 1, 2008
PubMed
Summary

We developed a simple, cost-effective method to stabilize optical cavities using phase-sensitive detection. This technique achieves high length stability, crucial for precision laser applications.

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Precision Measurement

Background:

  • Stabilizing optical cavities is essential for precise laser frequency control.
  • Conventional methods often require complex setups and significant equipment.
  • Piezo-driven cavities are common but challenging to stabilize effectively.

Purpose of the Study:

  • To present a simple and economical scheme for stabilizing and tuning piezo-driven optical cavities.
  • To achieve high length stability comparable to master lasers.
  • To reduce the cost and complexity of stabilizing multiple continuous-wave lasers.

Main Methods:

  • Driving the piezo actuator at its mechanical resonance (5 kHz).
  • Employing a feedback circuit with phase-sensitive detection of master laser transmission.
  • Utilizing an amplitude equivalent to one free spectral range for piezo drive.

Main Results:

  • Achieved a minimum Allan deviation of approximately 10 kHz (20 parts per trillion length stability).
  • The cavity-lock circuit bandwidth is limited by the piezo resonance frequency (1.4 kHz).
  • Stabilized cavity length reached its minimum Allan deviation within 30 seconds.

Conclusions:

  • The developed scheme offers a simple, cost-effective solution for optical cavity stabilization.
  • The method provides high length stability, suitable for precision laser systems.
  • This technique simplifies the stabilization of multiple continuous-wave lasers across different wavelengths.