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High-precision, accurate optical frequency reference using a Fabry-Perót diode laser.

Hongrok Chang1, Krishna Myneni2, David D Smith3

  • 1General Atomics, Electromagnetic Systems, 678 Discovery Dr., Huntsville, Alabama 35806, USA.

The Review of Scientific Instruments
|July 3, 2017
PubMed
Summary
This summary is machine-generated.

This study presents a stable and accurate diode laser system for optical spectroscopy. The Fabry-Perót laser, locked to rubidium resonances, achieves high frequency stability and accuracy for precision measurements.

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Area of Science:

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

Background:

  • High-frequency stability and accuracy are crucial for precision spectroscopy.
  • Diode lasers offer compact and tunable optical sources but often require stabilization.

Purpose of the Study:

  • To demonstrate a temperature and current-tuned Fabry-Perót diode laser system with high frequency stability and accuracy.
  • To characterize the spectral linewidth, frequency stability, and accuracy of the developed optical source.
  • To showcase its application in precision measurements of atomic energy levels.

Main Methods:

  • Utilizing a Fabry-Perót diode laser system tuned by temperature and current.
  • Locking the laser frequency to Doppler-free hyperfine resonances of the 87Rb D2 line.
  • Employing beat signal measurements between two such laser sources for stability analysis.

Main Results:

  • Achieved a frequency stability of 1.1 kHz with a minimum Allan deviation of 4×10-12 at τ=15 s.
  • Demonstrated a frequency accuracy of 60 kHz at τ=300 s.
  • Successfully used the optical source for precision measurement of hyperfine level frequency spacings in 87Rb.

Conclusions:

  • The developed diode laser system provides a highly stable and accurate optical source.
  • This system is suitable for precision measurements in atomic spectroscopy and can establish accurate frequency scales.