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arXiv 1201.2652physics.optics
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用于主动成像系统的高功率二极管泵浦调Q Er3 +:YAG单晶光纤laser

High-power diode-pumped Q-switched Er3+:YAG single-crystal fiber laser for active imaging system

Igor Martial, Julien Didierjean, François Balembois, Patrick Georges

摘要:

我们描述了一个有效的激光发射从直接生长的Er 3+:YAG单晶光纤,使用连续波(CW)激光二极管在1532 nm的共振泵浦。在纵向泵浦下,获得了12.5W的1645 nm激光输出,斜率效率为32%,是目前报道的直接生长Er:YAG单晶光纤激光器的最高输出功率。使用离轴泵浦方案,CW输出功率可以达到7.3 W,并且在Q开关操作中,激光器在1 kHz的重复频率下产生持续时间为38 ns的2 mJ脉冲,其中M^{2}因子低于1.8。据我们所知,这是第一个直接生长的Er ~(3+):YAG单晶光纤调Q激光器。在双侧泵浦方案中,获得了1617 nm的激光发射,输出功率高达5.7 W,代表了二极管泵浦的Er:YAG激光器在该波长处所获得的最高输出功率。

英文摘要:

We describe an efficient laser emission from a directly grown Er3+:YAG single-crystal fiber that is resonantly pumped using a continuous-wave (CW) laser diode at 1532 nm. In a longitudinal pumping, it emits 12.5 W at 1645 nm with a slope efficiency of 32%, which is the highest ever reported for a directly grown Er:YAG single-crystal fiber laser. Using an off-axis pumping scheme, CW output powers up to 7.3 W can be reached and in Q-switched operation, the laser produces 2 mJ pulses with a duration of 38 ns at the repetition rate of 1 kHz with an M^{2} factor below 1.8. To our knowledge this is the first directly grown Er3+:YAG single-crystal fiber Q-switched laser. In dual-side pumping scheme a laser emission at 1617 nm is achieved with output powers up to 5.7 W representing the highest output power ever achieved by a diode-pumped Er:YAG laser at this wavelength.

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