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Characteristics of a Q-switched multicore photonic crystal fiber laser with a very large mode field area

机译:具有很大模式场面积的调Q多芯光子晶体光纤激光器的特性

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摘要

We model and characterize the behavior of a Q-switched fiber laser. The fiber is a doped multicore photonic crystal fiber having six cores in a ring-type geometry. The fiber laser is Q-switched using an intracavity acousto-optic modulator. Using a mode filtering technique in the far field, a mode very close to the fundamental in-phase supermode is obtained with a mode field area of 4200 (mu)m~(2) and a divergence of 9 mrad. Pulses with energies of up to 2.2 mJ and durations of 26 ns (limited by end facet damage) at a repetition rate of 10 kHz are obtained.
机译:我们对调Q光纤激光器的行为进行建模和表征。该光纤是具有六个呈环形几何形状的纤芯的掺杂多芯光子晶体光纤。使用腔内声光调制器对光纤激光器进行Q开关。在远场中使用模式滤波技术,可获得非常接近于基本同相超模的模式,其模式场面积为4200μm〜(2),并且发散度为9mrad。以10 kHz的重复频率获得能量高达2.2 mJ,持续时间为26 ns(受端面破坏限制)的脉冲。

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