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Micro-integrated diode laser modules enabling mode-hop-free tuning and long-term frequency stabilization.

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    Summary
    This summary is machine-generated.

    We developed a compact laser module for quantum technologies, achieving a 22 GHz tuning range and improved frequency stability. This robust hybrid micro-integrated external cavity diode laser-master oscillator power amplifier (ECDL-MOPA) laser module offers enhanced performance for advanced applications.

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    Area of Science:

    • Quantum Technology
    • Laser Physics
    • Optical Engineering

    Background:

    • Quantum technologies require highly stable and tunable laser sources.
    • Existing laser modules often lack the required compactness and stability for field applications.

    Purpose of the Study:

    • To develop a robust and compact hybrid micro-integrated laser module for quantum technology applications.
    • To demonstrate a wide mode-hop-free frequency tuning range and improved frequency stability.

    Main Methods:

    • Design and fabrication of a hybrid micro-integrated external cavity diode laser-master oscillator power amplifier (ECDL-MOPA) laser module operating at 767 nm.
    • Implementation of a control loop utilizing spectroscopy of a frequency-selective element for mode-hop-free tuning.
    • Stabilization of the laser frequency to an internal volume holographic Bragg grating.

    Main Results:

    • Achieved a 22 GHz mode-hop-free frequency tuning range, extendable beyond 100 GHz.
    • Demonstrated a technical linewidth of ~165 kHz at 1 ms and a minimum overlapping Allan deviation of 6e-10 at 6s.
    • Reduced frequency drift by an order of magnitude, achieving a stability of 7e-9 at 10^5s.

    Conclusions:

    • The developed ECDL-MOPA laser module is a robust and compact solution for quantum technology applications.
    • The demonstrated tuning range and frequency stability meet critical requirements for advanced quantum systems.
    • Hybrid micro-integration offers a promising path towards miniaturized and high-performance laser sources.