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首页> 外文期刊>Applied optics >High-power single-frequency 1014.8 nm Yb-doped fiber amplifier working at room temperature
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High-power single-frequency 1014.8 nm Yb-doped fiber amplifier working at room temperature

机译：室温下工作的大功率单频1014.8 nm掺Yb光纤放大器

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摘要

A single-frequency 1014.8 nm Yb-doped fiber amplifier working at room temperature was investigated in detail with respect to gain fiber length, fiber geometry, and fiber host material, which can be frequency quadrupled to 253.7 nm for laser cooling of mercury. After optimization, an up to 8.06 W laser was achieved with a single-stage amplifier, and 19.3 W power was obtained with another boost amplifier, using polarization-maintaining Yb-doped single-mode fiber with a 10 μm core and 125 μm inner clad. The amplified spontaneous emission was 25 dB lower than the signal in the final output of the laser system. The laser has a linewidth of ～24 kHz without noticeable broadening after amplification. Further power scaling is limited by stimulated Brillouin scattering.
机译：针对增益光纤的长度，光纤的几何形状和光纤主体材料，对在室温下工作的单频1014.8 nm掺Yb光纤放大器进行了详细研究，可以将其频率翻倍至253.7 nm，以便对汞进行激光冷却。经过优化后，使用具有10μm纤芯和125μm内包层的偏振保持Yb掺杂单模光纤，单级放大器可达到8.06 W的激光，另一个升压放大器可获得19.3 W的功率。 。放大后的自发发射比激光系统最终输出中的信号低25 dB。激光的线宽为〜24 kHz，放大后不会明显变宽。受激布里渊散射限制了进一步的功率缩放。

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