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Towards direct 100-fs visible output at 750 nm from holmium fiber lasers: soliton dynamics and dispersion optimization

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  • Shi, Wei
  • Fei, Yaolin
  • Li, Wensong

Abstract

We present theoretical modeling and design of a visible nonlinear polarization rotation (NPR) mode-locked fiber laser operating at 750 nm for femtosecond pulse generation. The laser employs Ho3+:ZBLAN fiber as the gain medium, which offers a significantly broader emission bandwidth (∼13 nm) compared to conventional visible gain media, enabling the potential for 100-fs pulse generation directly from the cavity. Our numerical model is based on coupled full-vector Ginzburg-Landau equations incorporating fiber birefringence, group velocity dispersion, Kerr nonlinearity, and gain saturation effects. The ring-cavity configuration includes a dispersion delay line (DDL) for dispersion compensation, addressing the positive group velocity dispersion of Ho3+:ZBLAN fiber at 750 nm. Through systematic parametric analysis, dispersion-managed soliton formation is demonstrated under near-zero net cavity dispersion, yielding 102-fs pulses with a 15-nm spectral bandwidth. These findings establish a practical route to direct, ultrafast visible-fiber sources and provide a comprehensive soliton-dynamics framework for optimizing Holmium fiber lasers in the visible.

Suggested Citation

  • Shi, Wei & Fei, Yaolin & Li, Wensong, 2026. "Towards direct 100-fs visible output at 750 nm from holmium fiber lasers: soliton dynamics and dispersion optimization," Chaos, Solitons & Fractals, Elsevier, vol. 204(C).
    • Handle: RePEc:eee:chsofr:v:204:y:2026:i:c:s096007792501793x
    DOI: 10.1016/j.chaos.2025.117779
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