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<p>A scheme for a continuous-wave (CW) all-fiber polarization-maintaining (PM) holmium-doped laser at 2.05/2.09&#xa0;μm with high efficiency core-pumped by a thulium-doped fiber (TDF) laser is proposed. In the simulation, a rate equation model for the Ho laser is established to provide a theoretical guidance for the experiment. In the experiment, the TDF pumping source for the holmium-doped fiber (HDF) laser has an output wavelength of 1.94&#xa0;μm and an output power of 55&#xa0;W. The HDF laser is designed as a linear cavity structure with center wavelengths of 2049.4&#xa0;nm and 2088.6&#xa0;nm, maximum output powers of 37.5&#xa0;W and 36.3&#xa0;W, and the corresponding slope efficiencies of 75.3% and 72.9%, respectively. In the all-fiber PM HDF laser system, a high-quality laser output with a polarization extinction ratio (PER) of 15.3 dB, power stability of 0.32%, and beam quality (M<sup>2</sup>) of 1.18 is achieved.</p>

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All-fiber core-pumped polarization-maintaining Ho-doped laser at 2.05/2.09 μm with high efficiency

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月24日

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  • Dongming Zhang,
  • Yunpeng Wang,
  • Xinyu Cai,
  • Weinan Yan,
  • Wentao Zhou,
  • Hailin Hu,
  • Yang Li,
  • Pingxue Li

摘要

A scheme for a continuous-wave (CW) all-fiber polarization-maintaining (PM) holmium-doped laser at 2.05/2.09 μm with high efficiency core-pumped by a thulium-doped fiber (TDF) laser is proposed. In the simulation, a rate equation model for the Ho laser is established to provide a theoretical guidance for the experiment. In the experiment, the TDF pumping source for the holmium-doped fiber (HDF) laser has an output wavelength of 1.94 μm and an output power of 55 W. The HDF laser is designed as a linear cavity structure with center wavelengths of 2049.4 nm and 2088.6 nm, maximum output powers of 37.5 W and 36.3 W, and the corresponding slope efficiencies of 75.3% and 72.9%, respectively. In the all-fiber PM HDF laser system, a high-quality laser output with a polarization extinction ratio (PER) of 15.3 dB, power stability of 0.32%, and beam quality (M2) of 1.18 is achieved.