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Related Experiment Video

Updated: Jun 9, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

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Published on: February 28, 2016

Acousto-optic mode locking of 3-microm Er lasers.

H J Eichler, J Albertz, F Below

    Applied Optics
    |August 25, 2010
    PubMed
    Summary

    Erbium-doped YAG and YLF lasers were actively mode-locked using a TeO(2) modulator. Er:YLF produced shorter, more stable pulses, while Er:YAG showed higher efficiency in free-running mode.

    Area of Science:

    • Laser Physics
    • Materials Science

    Background:

    • Erbium-doped lasers are crucial for various applications.
    • Mode-locking is essential for generating ultrashort laser pulses.

    Purpose of the Study:

    • To actively mode-lock Er:YAG and Er:YLF lasers.
    • To compare the performance of Er:YAG and Er:YLF lasers under mode-locking conditions.

    Main Methods:

    • Active mode-locking using a tellurium dioxide (TeO(2)) acousto-optic modulator.
    • Utilizing a lithium niobate (LiNbO(3)) transducer with 4 W of electrical driving power for Er:YLF.

    Main Results:

    • Er:YLF lasers generated shorter and more stable mode-locked pulses.
    • Er:YAG lasers exhibited a higher slope efficiency of 0.8% in free-running operation.

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  • Mode-locked pulse durations under 700 picoseconds (ps) were achieved with Er:YLF.

    • Conclusions:

    • Er:YLF lasers are advantageous for generating high-quality, stable ultrashort pulses.
    • Er:YAG lasers offer superior slope efficiency in free-running configurations.
    • The choice between Er:YAG and Er:YLF depends on specific application requirements for pulse characteristics and efficiency.