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Related Experiment Video

Updated: May 7, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Published on: January 28, 2019

Feedback control of optical beam spatial profiles using thermal lensing.

Zhanwei Liu, Paul Fulda, Muzammil A Arain

    Applied Optics
    |October 3, 2013
    PubMed
    Summary

    This study presents adaptive thermal lensing for laser beam control. A segmented heater actively adjusts beam size, position, and steering for enhanced stability.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Adaptive Optics

    Background:

    • Precise control over laser beam spatial profiles is crucial for many optical applications.
    • Traditional methods for beam shaping and steering can be complex and limited in dynamic range.

    Purpose of the Study:

    • To develop and demonstrate a novel method for active laser beam control using adaptive thermal lensing.
    • To enable precise adjustments of beam size, position, and steering.

    Main Methods:

    • Utilized a transmissive optical element with a segmented electrical heater to induce controllable thermal gradients.
    • Generated adaptive thermal lenses, including cylindrical lens capabilities, for beam manipulation.
    • Implemented a feedback control loop with the thermal lensing device as an actuator.

    Main Results:

    • Successfully demonstrated active control over the laser beam's spatial profile.
    • Achieved stabilization of beam size and position through the feedback control loop.
    • Showcased the capability to steer the laser beam in both horizontal and vertical planes.

    Conclusions:

    • Adaptive thermal lensing with a segmented heater offers a versatile and effective approach for active laser beam control.
    • The developed system provides dynamic stabilization and steering capabilities.
    • This method has potential applications in various laser-based technologies requiring precise beam management.