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Updated: Jun 25, 2026

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Phosphorus-doped fiber for flat octave spanning supercontinuum generation.

Yang Zhang, Jiangming Xu, Junrui Liang

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    |February 15, 2024
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    Researchers achieved flat fiber supercontinuum (SC) generation using phosphorus-doped fiber. This method broadens the spectrum and reduces power fluctuations, benefiting applications like optical coherence tomography.

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    Area of Science:

    • Nonlinear optics
    • Materials science

    Background:

    • Raman scattering significantly extends fiber supercontinuum (SC) spectra to longer wavelengths.
    • Optimizing SC generation requires careful selection of nonlinear media to control spectral properties.

    Purpose of the Study:

    • To demonstrate flat SC generation using a phosphorus-doped fiber.
    • To leverage the broad Raman gain spectrum of phosphorus-doped fiber for enhanced SC properties.

    Main Methods:

    • Utilized a phosphorus-doped fiber as the nonlinear medium for SC generation.
    • Characterized the generated SC spectrum and spectral power density.

    Main Results:

    • Achieved flat SC generation spanning 850 to 2150 nm.
    • Exhibited spectral power density fluctuation below 7 dB within 1.1-2.0 µm.
    • Demonstrated a 300 nm broader wavelength span and 5 dB lower fluctuation compared to germanium-doped fiber.

    Conclusions:

    • Phosphorus-doped fiber offers significant advantages for spectrally flat SC generation.
    • The enhanced SC properties are crucial for applications in optical coherence tomography, absorption spectroscopy, and telecommunication.