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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Related Experiment Video

Updated: Nov 12, 2025

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Published on: July 12, 2017

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Nonlinear dynamics in intra-cavity pumped thin-disk lasers.

Sarah Trinschek, Christian Vorholt, Ulrich Wittrock

    Optics Express
    |March 17, 2021
    PubMed
    Summary

    Complex laser power dynamics in intra-cavity pumped Yb:YAG thin-disk lasers were observed. These nonlinear dynamics, arising from gain media cross-saturation, can be controlled by resonator length and exhibit multi-stability.

    Area of Science:

    • Laser physics
    • Nonlinear dynamics
    • Thin-disk laser technology

    Background:

    • Intra-cavity pumped lasers exhibit complex behaviors due to gain media cross-saturation.
    • Yb:YAG thin-disk lasers are widely used in various applications requiring high power output.

    Purpose of the Study:

    • To experimentally investigate and theoretically analyze the nonlinear dynamics of an intra-cavity pumped Yb:YAG thin-disk laser.
    • To understand the influence of gain media cross-saturation on laser power fluctuations.

    Main Methods:

    • Utilized a rate-equation model for theoretical analysis.
    • Conducted experiments on an intra-cavity pumped Yb:YAG thin-disk laser system.
    • Varied resonator length to observe effects on laser dynamics.

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    Main Results:

    • Observed continuous-wave operation, periodic pulse trains, and chaotic power fluctuations.
    • Demonstrated that dynamics arise intrinsically, not from external perturbations.
    • Showed control over operational modes via resonator length, revealing hysteresis and multi-stability.

    Conclusions:

    • Gain media cross-saturation is a key factor driving complex nonlinear dynamics in these lasers.
    • Resonator length offers a method for controlling laser operation modes.
    • The system exhibits inherent multi-stability and hysteresis, crucial for laser design and application.