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首页> 外文期刊>Optical engineering >Hundred-watts-level monolithic narrow linewidth linearly-polarized fiber laser at 1018 nm
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Hundred-watts-level monolithic narrow linewidth linearly-polarized fiber laser at 1018 nm

机译：百瓦级单片窄线宽线性偏振光纤激光器，波长为1018 nm

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摘要

We theoretically and experimentally demonstrated an all-fiber, hundred-watts-level, linearly-polarized, narrow spectral linewidth laser amplifier at a central wavelength of 1018 nm based on master oscilla-tor-power amplifier configuration, which is composed of a laser oscillator and one stage of the fiber amplifier. The laser system can generate 104-W output power with 3- and 20-dB spectral linewidth of ～0.073 and ～0.25 nm, respectively, and a higher polarization extinction ratio of ～17.89 dB at 1018.3 nm was obtained. Theoretical analysis based on the rate equations was used to optimize the parameters of 1018-nm ytterbium-doped fiber laser system for the maximum suppression of amplified spontaneous emission (ASE). The ASE was well depressed based on the optimization for the parameters of the laser system including the seed power, seed spectrum, gain fiber length in the amplifier, etc. And ～27-dB signal-to-noise ratio was achieved at the maximum output power. The slope efficiency for the amplifier stage can reach 79%, and near-diffraction-limited beam quality (M_x~2 ～ 1.617 and M_y~2 ～ 1.635) was Obtained.
机译：我们在理论上和实验上演示了基于主振荡-功率放大器配置的全光纤，百瓦级，线性偏振，窄谱线宽的激光放大器，其中心波长为1018 nm，该放大器由激光振荡器组成和光纤放大器的一级。该激光系统可以产生104W的输出功率，其3和20 dB的光谱线宽分别为〜0.073和〜0.25 nm，并且在1018.3 nm处获得了更高的偏振消光比〜17.89 dB。基于速率方程的理论分析用于优化1018 nm掺fiber光纤激光器系统的参数，以最大程度地抑制放大的自发辐射（ASE）。通过优化激光系统的参数（包括种子功率，种子光谱，放大器中的增益光纤长度等），ASE受到了很好的抑制。在最大输出时信噪比达到了〜27 dB功率。放大器级的斜率效率可以达到79％，并获得了近衍射极限的光束质量（M_x〜2〜1.617和M_y〜2〜1.635）。

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