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    We developed a novel fiber-delay-line-stabilized laser using a dual Mach-Zehnder interferometer. This system effectively suppresses laser frequency noise caused by temperature fluctuations, improving stability.

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    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Interferometry

    Background:

    • Fiber-delay-line-stabilized lasers are crucial for various applications but are susceptible to temperature-induced frequency fluctuations.
    • Existing stabilization methods often require complex thermal management systems.

    Purpose of the Study:

    • To demonstrate a temperature-insensitive fiber-delay-line-stabilized laser.
    • To reduce laser frequency noise caused by environmental temperature changes.
    • To enable more compact and efficient laser systems.

    Main Methods:

    • Utilizing a dual Mach-Zehnder interferometer (MZI) with polarization maintaining fibers (PMFs).
    • Employing two orthogonal polarization components within the MZI, each experiencing unique phase shifts with temperature changes.
    • Implementing a heterodyne signal for laser frequency locking and another for temperature-induced frequency fluctuation compensation.

    Main Results:

    • Achieved significant suppression of laser frequency fluctuations, reducing them by at least 25 times.
    • Demonstrated an effective method for mitigating temperature-induced laser frequency noise.
    • Validated the dual MZI approach for real-time frequency compensation.

    Conclusions:

    • The developed dual MZI-based FDL-stabilized laser offers robust temperature insensitivity.
    • This technology enables the realization of compact laser systems with reduced thermal shielding requirements.
    • The method significantly decreases thermal equilibrium time, enhancing system responsiveness.