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Related Experiment Video

Updated: Jan 8, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Phase-change material based external cavity laser for frequency modulated continuous wave LiDAR.

Yining Liang, Miao Xv, Shenghong Xie

    Optics Express
    |December 19, 2025
    PubMed
    Summary

    We developed a new external cavity laser (ECL) using a phase-change material (PCM) for fast, wide-range frequency tuning. This technology enhances resolution and speed for light detection and ranging applications.

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    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science

    Background:

    • External cavity lasers (ECLs) are crucial for tunable light sources.
    • Phase-change materials (PCMs) offer unique optical properties for device applications.

    Purpose of the Study:

    • To propose and simulate a novel ECL architecture.
    • To leverage the properties of antimony trisulfide (Sb2S3) for rapid frequency tuning.

    Main Methods:

    • Integration of a waveguide Bragg grating (WBG) with a Sb2S3 PCM layer.
    • Simulations to evaluate frequency tuning range and linewidth.

    Main Results:

    • Achieved a tunable frequency range of up to 100 GHz.
    • Demonstrated a narrow output lasing linewidth of approximately 41.06 kHz.

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  • Utilized the fast and reversible phase-switching of Sb2S3.

    • Conclusions:

    • The proposed ECL design enables efficient, wide-range frequency tuning.
    • Potential for enhanced resolution and ranging speed in light detection and ranging (LiDAR).
    • Highlights the utility of Sb2S3 PCMs in tunable laser systems.