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Stabilized (3)He-(20)Ne transverse Zeeman laser.

N Umeda, M Tsukiji, H Takasaki

    Applied Optics
    |March 11, 2010
    PubMed
    Summary

    This study reveals distinct tuning behaviors in 633-nm lasers using natural neon versus neon-20. Researchers achieved high frequency stability in a (3)He-(20)Ne laser, paving the way for accurate wavelength standards.

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    Area of Science:

    • Laser Physics
    • Spectroscopy
    • Quantum Optics

    Background:

    • Internal mirror lasers operating at 633 nm are crucial for metrology.
    • Understanding the tuning characteristics of these lasers is essential for frequency stabilization.
    • Isotopic composition of neon affects laser performance.

    Purpose of the Study:

    • Investigate the tuning characteristics of 633-nm lasers using natural Ne and neon-20.
    • Analyze power, intramode beat frequency, and polarization tuning curves.
    • Determine parameters for frequency stabilization of a (3)He-(20)Ne laser.

    Main Methods:

    • Experimental study of 633-nm internal mirror lasers.
    • Comparison of tuning curves for natural Ne and neon-20.
    • Application of a transverse magnetic field to collapse axial modes.
    • Frequency stabilization using a cooling fan and constant intramode beat monitoring.

    Main Results:

    • Observed S-shaped tuning curves for polarization (natural Ne) and intramode beat frequency (neon-20).
    • Determined characteristic parameters of the intramode beat frequency tuning curve.
    • Achieved frequency stabilization with a fluctuation of 3 x 10(-10) via Allan variance analysis.
    • Demonstrated potential for absolute accuracy and interinstrumental reproducibility.

    Conclusions:

    • Isotopic composition significantly influences laser tuning characteristics.
    • A stabilized (3)He-(20)Ne transverse Zeeman laser offers a reliable wavelength standard.
    • The study provides a foundation for developing highly accurate laser-based measurement systems.

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