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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Long-range tunable diode laser.

S Filimonov, J Borysow

    Applied Optics
    |October 22, 2010
    PubMed
    Summary

    A new tuning method for pseudo-external-cavity diode lasers offers a wide continuous tuning range of 120 GHz. This simple mechanism, using a turning wedge, significantly enhances laser tunability without external cavity locking.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Semiconductor Devices

    Background:

    • Single-mode diode lasers are crucial for various applications.
    • Achieving wide, continuous tuning ranges in diode lasers remains a challenge.
    • Existing tuning mechanisms often require complex setups or external cavities.

    Purpose of the Study:

    • To develop a novel and simple tuning mechanism for single-mode, pseudo-external-cavity diode lasers.
    • To experimentally validate the predicted continuous tuning range.
    • To demonstrate enhanced tunability without external cavity locking.

    Main Methods:

    • A pseudo-external-cavity diode laser was designed using a commercial laser diode chip.
    • A diffraction grating was employed for optical feedback.
    • A turning wedge was integrated within the laser cavity as the primary tuning element.

    Main Results:

    • Model calculations predicted a continuous tuning range of up to 300 GHz.
    • Experimental results demonstrated a continuous tuning range of approximately 120 GHz at constant current and temperature.
    • The achieved tuning range is several times greater than previously reported values for similar systems.
    • The total tuning range can extend up to 20 nm, depending on the laser diode type.

    Conclusions:

    • The developed tuning mechanism provides a simple and effective method for achieving wide continuous tuning in diode lasers.
    • The pseudo-external-cavity design with an internal turning wedge offers significant advantages in laser tunability.
    • This technology has the potential to advance applications requiring precise and broad wavelength selection in diode lasers.

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