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Updated: Nov 12, 2025

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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10 W injection-locked single-frequency continuous-wave titanium:sapphire laser.

Tetsushi Takano, Hisashi Ogawa, Chiaki Ohae

    Optics Express
    |March 17, 2021
    PubMed
    Summary

    Researchers developed a high-power continuous-wave injection-locked titanium:sapphire laser. This laser achieves 10 W single-frequency oscillation with excellent transverse mode quality and 51% slope efficiency.

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    Area of Science:

    • Laser physics
    • Quantum optics

    Background:

    • High-power tunable lasers are essential for quantum physics research.
    • Achieving good longitudinal and transverse modes in high-power lasers is challenging.

    Purpose of the Study:

    • To develop a high-power continuous-wave injection-locked titanium:sapphire laser.
    • To optimize laser cavity configuration for improved mode quality and efficiency.

    Main Methods:

    • Utilized a low-loss cavity configuration with only a laser crystal.
    • Investigated the effect of thermal lensing in the laser crystal.
    • Adjusted crystal holder temperature and pump power to control thermal lens focal length.

    Main Results:

    • Achieved 10 W single-frequency oscillation.
    • Demonstrated good transverse mode quality.
    • Obtained a slope efficiency of 51%.

    Conclusions:

    • A high-power, single-frequency titanium:sapphire laser with excellent mode quality was successfully demonstrated.
    • Control over thermal lensing is key to optimizing laser performance.
    • This laser system is a valuable tool for quantum physics applications.