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Related Experiment Video

Updated: Sep 7, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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Ultra-compact diode-pumped single-frequency Ti:sapphire laser.

Alexander A Lagatsky, Gerald M Bonner, Peter J Schlosser

    Optics Letters
    |June 16, 2022
    PubMed
    Summary

    Researchers developed an ultra-compact, single-frequency titanium-sapphire (Ti:sapphire) laser using direct diode pumping. This compact laser achieves a narrow linewidth, making it suitable for various scientific applications.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Titanium-sapphire (Ti:sapphire) lasers are widely used for tunable laser light generation.
    • Achieving single-frequency operation in compact laser systems presents significant engineering challenges.
    • Direct diode pumping offers an efficient and compact alternative to traditional lamp or Ti:sapphire pump lasers.

    Purpose of the Study:

    • To develop an ultra-compact single-frequency Ti:sapphire laser.
    • To investigate the feasibility of direct diode pumping for Ti:sapphire lasers.
    • To achieve stable single-longitudinal-mode operation in a miniature laser resonator.

    Main Methods:

    • Utilized a miniature plane-parallel resonator for the Ti:sapphire laser.
    • Employed a volume Bragg grating as an output coupler to ensure single-longitudinal-mode operation.

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    Last Updated: Sep 7, 2025

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    Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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  • Used InGaN laser diodes (470 nm and 490 nm, 6.7 W combined power) for direct diode pumping.

    • Main Results:

    • Achieved single-frequency operation at 813.4 nm with a maximum output power of 700 mW.
    • Measured a free-running laser linewidth of 2.4 MHz.
    • Reduced the laser linewidth to approximately 180 kHz when locked to an external reference cavity.

    Conclusions:

    • Demonstrated the successful development of an ultra-compact, diode-pumped, single-frequency Ti:sapphire laser.
    • The use of a volume Bragg grating is effective for achieving single-frequency operation in miniature resonators.
    • The developed laser system exhibits a narrow linewidth suitable for high-precision applications.