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Updated: Jun 19, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Compact Kerr-lens mode-locked resonators.

B E Bouma, J G Fujimoto

    Optics Letters
    |October 30, 2009
    PubMed
    Summary

    We explored compact titanium-doped aluminum oxide (Ti:Al2O3) laser designs for improved Kerr-lens mode locking. A novel cavity design with an intracavity lens achieved self-starting mode locking by utilizing nonastigmatic modes.

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    Area of Science:

    • Laser Physics
    • Optics
    • Materials Science

    Background:

    • Kerr-lens mode locking (KLM) is a crucial technique for generating ultrashort laser pulses.
    • Compact laser resonators are desirable for practical applications.
    • Optimizing KLM in Ti:Al2O3 lasers requires careful consideration of cavity design and optical aberrations.

    Purpose of the Study:

    • To compare compact three-element Ti:Al2O3 laser resonator designs for enhanced Kerr-lens mode locking.
    • To demonstrate a novel compact cavity design for improved KLM.
    • To investigate the role of nonastigmatic modes and chromatic aberration in KLM.

    Main Methods:

    • Comparison of different compact three-element Ti:Al2O3 laser resonator configurations.
    • Implementation of a novel cavity design incorporating an intracavity lens.
    • Analysis of Kerr-lens action and mode properties (astigmatic vs. nonastigmatic).
    • Investigation of group-velocity dispersion effects due to chromatic aberration.

    Main Results:

    • Demonstration of a novel compact cavity design that enhances Kerr-lens action.
    • Achievement of self-starting mode locking using nonastigmatic modes.
    • Identification and demonstration of a new group-velocity dispersion mechanism originating from intracavity chromatic aberration.

    Conclusions:

    • The novel compact cavity design significantly improves Kerr-lens mode locking in Ti:Al2O3 lasers.
    • Nonastigmatic modes are effective in achieving self-starting mode locking.
    • Chromatic aberration of intracavity focusing elements introduces a new GVD mechanism relevant for laser design.

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