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Related Experiment Videos

Passive athermalization of multimode interference devices for wavelength-locking applications.

Victor I Ruiz-Perez, Daniel A May-Arrioja, Jose R Guzman-Sepulveda

    Optics Express
    |April 7, 2017
    PubMed
    Summary

    This study presents a simple, material-based method for athermalization in fiber optics using multimode interference (MMI) devices. This innovation ensures temperature-independent laser operation with unprecedented stability.

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    Area of Science:

    • Photonics and Optical Engineering
    • Fiber Optics Technology
    • Laser Systems

    Background:

    • Fiber optic devices often suffer from temperature-dependent performance, limiting their stability and applications.
    • Multimode Interference (MMI) devices offer unique spectral filtering properties but require thermal management.
    • Existing thermal compensation techniques can be complex or compromise device performance.

    Purpose of the Study:

    • To develop a passive, material-based athermalization technique for all-fiber architectures.
    • To achieve temperature-independent operation of MMI devices while maintaining their spectral characteristics.
    • To demonstrate a simple and effective method for thermal compensation in fiber lasers.

    Main Methods:

    • Cascading multimode interference (MMI) devices.

    Related Experiment Videos

  • Incorporating an in-line, liquid-core multimode section with variable length for thermal compensation.
  • Fabricating a wavelength-locked MMI laser incorporating the athermalization unit.

    • Main Results:

    • Demonstrated passive, material-based athermalization of all-fiber MMI devices.
    • Achieved temperature-independent operation by preserving the MMI filter-like spectral response.
    • Fabricated a wavelength-locked MMI laser with an ultra-low sensitivity of -0.1 pm/°C.

    Conclusions:

    • The proposed in-line thermal compensation unit is straightforward to design and fabricate.
    • This approach significantly enhances the temperature stability of fiber optic devices, particularly MMI lasers.
    • The achieved sensitivity is an order of magnitude lower than previously reported methods, opening new possibilities for stable fiber optic systems.