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Related Experiment Video

Updated: Oct 17, 2025

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Widely tunable external-cavity surface-emitting laser using various methods.

Lin Mao, Xiaojian Zhang, Renjiang Zhu

    Applied Optics
    |October 6, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a widely tunable optically pumped vertical-external-cavity surface-emitting laser. Different tuning elements achieved wavelength coverage up to 45 nm, demonstrating versatile laser tuning capabilities.

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    Area of Science:

    • Optics and Photonics
    • Semiconductor Lasers
    • Quantum Well Technology

    Background:

    • Optically pumped vertical-external-cavity surface-emitting lasers (VECSELs) are crucial for various applications.
    • Tuning the oscillating wavelength of VECSELs is essential for wavelength-agile systems.
    • Resonant periodic gain structures in VECSELs enable efficient light generation.

    Purpose of the Study:

    • To investigate and demonstrate a widely tunable optically pumped VECSEL.
    • To explore different methods for achieving broad wavelength tuning in VECSELs.
    • To analyze the wavelength tuning mechanism using novel tuning elements.

    Main Methods:

    • Fabrication of a VECSEL with multiple quantum wells in the active region.
    • Integration of a birefringent filter (2 mm thickness) into a straight-line cavity.
    • Incorporation of an uncoated Fabry-Perot etalon (0.15 mm thickness).
    • Introduction of an inserted blade as a novel tuning element.

    Main Results:

    • Achieved a maximum wavelength coverage of 45 nm using a birefringent filter.
    • Demonstrated an 8 nm tuning range with a Fabry-Perot etalon.
    • Reported an 11 nm tuning range using an inserted blade, with analysis of the tuning mechanism.

    Conclusions:

    • The study successfully demonstrated a widely tunable optically pumped VECSEL.
    • Birefringent filters offer extensive wavelength coverage, while etalons provide narrower tuning ranges.
    • The inserted blade presents a novel and effective method for VECSEL wavelength tuning.