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报道了1030nm高功率被动锁模皮秒脉冲掺镱光纤激光器。该激光器为全光纤结构,采用主振荡功率放大(MOPA)技术,由皮秒种子源与三级掺镱光纤放大器组成。种子源使用半导体可饱和吸收镜(SESAM)进行被动锁模,输出脉冲中心波长为1030.4nm、3dB光谱宽度为0.15nm、脉冲宽度为30.7ps、重复频率为29.0MHz、输出功率为30mW。通过三级掺镱光纤放大器后,最终在30μm/250μm双包层掺镱光纤中实现了平均功率为101W的皮秒脉冲激光输出,3dB光谱宽度为1.46nm,脉冲宽度为36.6ps,放大器斜率效率为76.7%,单脉冲能量为3.48μJ,峰值功率为97kW,光束质量M2=2.78。
Reported a 1030nm high power passive mode-locked picosecond-pulse ytterbium-doped fiber laser. The laser is an all-fiber structure, using the main oscillator power amplifier (MOPA) technology, the picosecond seed source and three Ytterbium-doped fiber amplifier. The seed source is passively mode-locked using a semiconducting saturable absorption mirror (SESAM). The output pulse has a center wavelength of 1030.4 nm, a 3dB spectral width of 0.15 nm, a pulse width of 30.7 ps, a repetition frequency of 29.0 MHz and an output power of 30 mW. After three Yb-doped fiber amplifiers, the picosecond pulse laser output with an average power of 101W was achieved in a 30μm / 250μm double-clad Yb-doped fiber. The 3dB spectral width was 1.46nm, the pulse width was 36.6ps, the slope efficiency of the amplifier 76.7%, single-pulse energy of 3.48 μJ, peak power of 97 kW and beam quality of M2 = 2.78.