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Related Experiment Videos

Doppler-free spectroscopy using a continuous-wave optical frequency synthesizer.

Hajime Inaba1, Takeshi Ikegami, Feng-Lei Hong

  • 1National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan. h.inaba@aist.go.jp

Applied Optics
|June 30, 2006
PubMed
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This study demonstrates a continuous-wave (cw) optical frequency synthesizer, achieving precise frequency control for atomic clock applications. The novel system enables continuous tuning and Doppler-free spectroscopy of the cesium D1 line.

Area of Science:

  • Quantum Optics
  • Atomic Physics
  • Metrology

Background:

  • Precise frequency control is crucial for advanced applications like atomic clocks and spectroscopy.
  • Continuous-wave optical parametric oscillators (cw-OPOs) offer potential for generating tunable laser light.
  • Integrating cw-OPOs with optical frequency combs and atomic clocks enhances frequency stability and accuracy.

Purpose of the Study:

  • To demonstrate a continuous-wave (cw) optical frequency synthesizer.
  • To achieve phase locking between a cw-OPO, an optical frequency comb, and an atomic clock.
  • To enable tunable, high-precision spectroscopy using the synthesized optical frequency.

Main Methods:

  • A monolithic-type cw optical parametric oscillator (cw-OPO) was employed.

Related Experiment Videos

  • The cw-OPO was phase-locked to an optical frequency comb, which was in turn phase-locked to an atomic clock.
  • An electro-optic modulator was used for continuous frequency shifting over a 10 GHz range.

    • Main Results:

    • A stable cw optical frequency synthesizer was successfully demonstrated.
    • Continuous frequency tuning over 10 GHz was achieved.
    • Doppler-free spectroscopy of the cesium D1 line at 895 nm was performed with a 5 MHz linewidth, matching the natural linewidth.

    Conclusions:

    • The developed optical frequency synthesizer provides precise and continuously tunable optical frequencies.
    • The system's accuracy was validated by reproducing the natural linewidth and center frequency of the cesium D1 line.
    • This technology holds promise for advancements in metrology, spectroscopy, and quantum information processing.