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报道了基于半导体可饱和吸收镜锁模的大模场面积双包层掺镱光子晶体光纤(PCF)激光器。激光器采用环形腔结构,腔内无色散补偿机理,使其工作在全正色散锁模状态,在耦合进入光子晶体光纤的功率为12.2W时获得了脉冲宽度为3.3ps,重复频率高达93.33MHz的稳定锁模脉冲激光输出,中心波长为1027nm,3dB线宽为1nm,在耦合进入光子晶体光纤的功率为14W时获得最高输出功率150mW,激光器可连续稳定工作2h以上,没有出现失锁现象。在不同实验条件中,观察到调Q锁模和脉冲分裂现象,并分别给出了分析和解释。
A large-mode-area double-clad ytterbium-doped photonic crystal fiber (PCF) laser based on semiconductor saturable absorption mirror mode-locking was reported. The laser adopts the ring cavity structure, the cavity has no dispersion compensation mechanism, which makes it work in the all positive dispersion mode-locked state. When the power coupled into the photonic crystal fiber is 12.2W, the pulse width is 3.3ps and the repetition frequency is up to 93.33MHz Stable mode-locked pulsed laser output with a center wavelength of 1027 nm and a 3dB line width of 1 nm achieves a maximum output power of 150 mW at a coupled power of 14 W into the photonic crystal fiber. The laser can work continuously for more than 2 h with no lock-out. In different experimental conditions, Q-mode-locking and pulsed splitting were observed and analyzed and explained separately.