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Frequency measuring system using mirror gap stabilized Fabry-Perot interferometer.

Nobuo Nishimiya1, Yoko Yamaguchi, Yoshinobu Ohrui

  • 1Department of Electronic and Computer Engineering, Tokyo Institute of Polytechnics, Iiyama 1583, Atsugi City 243-0297, Kanagawa, Japan. nisimiya@ee.t-kougei.ac.jp

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|January 30, 2004
PubMed
Summary

This study stabilized a Fabry-Perot interferometer using two laser diodes for precise frequency markers. These markers offer high accuracy for applications in atomic physics and metrology.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Quantum Metrology
  • Laser Spectroscopy

Background:

  • Accurate frequency standards are crucial for scientific advancements.
  • Fabry-Perot interferometers are sensitive optical devices.
  • Stabilization techniques are needed to maintain precision.

Purpose of the Study:

  • To stabilize the mirror gap of a Fabry-Perot interferometer.
  • To utilize stabilized interferometer fringe signals as precise frequency markers.
  • To achieve high accuracy in frequency measurements.

Main Methods:

  • Stabilization of the interferometer mirror gap using two laser diodes.
  • Locking lasers to specific hyperfine transitions of Rubidium-87 (87Rb).
  • Adjusting mirror gap length to achieve simultaneous zero-cross points at two line positions.

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Main Results:

  • Simultaneous zero-cross points generated at two distinct 87Rb line positions.
  • Obtained fringe signals serve as frequency markers with accuracies of the order of 10^10.
  • Uncertainty of markers near reference lines is approximately +/- 5 MHz, based on Cesium D1 line measurements.

Conclusions:

  • The developed method provides a robust technique for creating highly accurate frequency markers.
  • The stabilized Fabry-Perot interferometer is a valuable tool for frequency metrology.
  • This approach enhances precision in spectroscopic measurements and frequency standard applications.