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Self-corrected chip-based dual-comb spectrometer.

Nicolas Bourbeau Hébert, Jérôme Genest, Jean-Daniel Deschênes

    Optics Express
    |April 7, 2017
    PubMed
    Summary
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    We developed a stable, chip-based dual-comb spectrometer using two lasers. Its self-correction algorithm simplifies operation and enables high-resolution molecular spectroscopy.

    Area of Science:

    • Optics and Photonics
    • Spectroscopy
    • Laser Technology

    Background:

    • Dual-comb spectroscopy (DCS) offers high resolution but often requires complex systems.
    • Existing DCS instruments can be bulky and rely on external reference lasers for stability.

    Purpose of the Study:

    • To develop a compact, self-stabilized dual-comb spectrometer on a single chip.
    • To implement a novel self-correction algorithm for simplified operation and enhanced stability.
    • To demonstrate the instrument's capability for high-resolution molecular spectroscopy.

    Main Methods:

    • Integration of two passively mode-locked waveguide lasers on an Er-doped ZBLAN chip.
    • Development of a self-correction algorithm utilizing the ambiguity function to process interferograms.

    Related Experiment Videos

  • Acquisition of a molecular spectrum without external reference lasers or active control systems.

    • Main Results:

    • Achieved a highly stable dual-comb system on a single chip.
    • Demonstrated a simplified self-correction method, reducing reliance on external systems.
    • Obtained mode-resolved spectra with timing discrepancies as low as 50 attoseconds compared to reference laser methods.
    • Successfully acquired a 20 nm wide, high-resolution molecular spectrum.

    Conclusions:

    • The chip-based dual-comb spectrometer offers a simplified, stable, and compact platform.
    • The self-correction algorithm significantly eases instrument deployment and commercialization.
    • This technology is suitable for developing fieldable comb spectrometers in the near- and mid-infrared spectrum.