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中文摘要：
研制了高功率全光纤结构2μm波段掺铥皮秒脉冲光纤激光器。该激光器采用了主振荡功率放大（MOPA）结构设计,种子源采用790nm的多模半导体激光器作为抽运源、双包层掺铥光纤作为激光增益介质、半导体可饱和吸收镜（SESAM）作为锁模器件,从而实现了重复频率为10.4MHz的皮秒激光脉冲输出,其最大平均输出功率为15mW。种子源经过一级掺铥光纤放大器后,获得了1.1W高平均功率输出,相应的单脉冲能量高达105nJ,激光脉冲宽度为9ps,峰值功率为11.6kW。此时测得激光脉冲的中心波长为1963nm,3dB光谱带宽为0.5nm。
英文摘要：
A high-power 2.0μm thulium-doped ultrafast all-fiber master oscillator power amplifier （MOPA） is developed. The seed source is a thulium-doped double-clad single-mode fiber laser passively mode-locked by a semiconductor saturable absorber mirror （SESAM）. It produces about 15 mW average output power with 10.4 MHz repetition rate. A thulium-doped all-fiber amplifier is used to boost average output power to 1.1 W, corresponding to the single pulse energy of 105 nJ. The pulse width is measured to be 9 ps, the center wavelength and the spectral bandwidth are 1963 nm and 0.5 nm respectively. To the best of our knowledge, this is the first report for all-fiber thulium-doped ultrafast fiber laser with watts-level average output power.
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