Huang J Y, Zhuang W Z, Huang W C, Su K W, Huang K F, Chen Y F
Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan.
Opt Express. 2011 May 9;19(10):9364-70. doi: 10.1364/OE.19.009364.
We investigate the performance of a hybrid Q-switched (HQS) fiber laser that is constructed with a low RF-power driven acousto-optic (AO) Q-switch and an AlGaInAs semiconductor saturable absorber. Compared to a pure passively Q-switched (PQS) fiber laser, the ratio of timing jitter to pulse period can be significantly reduced from 2% to 0.3% in the regime of far above threshold. On the other hand, the prelasing effect in a pure actively Q-switched fiber laser can be considerably improved. More importantly, the maximum pulse energy of the HQS fiber laser can be increased approximately 25% in comparison with the result of the PQS fiber laser. At a pump power of 24 W, the highest pulse energy is up to 0.56 mJ with the pulse duration of 50 ns at the repetition rate of 23 kHz.
我们研究了一种混合调Q（HQS）光纤激光器的性能，该激光器由低射频功率驱动的声光（AO）调Q开关和AlGaInAs半导体可饱和吸收体构成。与纯被动调Q（PQS）光纤激光器相比，在远高于阈值的情况下，定时抖动与脉冲周期的比率可从2%显著降低至0.3%。另一方面，纯主动调Q光纤激光器中的预激射效应可得到显著改善。更重要的是，与PQS光纤激光器的结果相比，HQS光纤激光器的最大脉冲能量可增加约25%。在泵浦功率为24 W时，最高脉冲能量可达0.56 mJ，脉冲持续时间为50 ns，重复频率为23 kHz。
