Q-switched oscillation in thulium-doped fiber lasers using preloaded dynamic microbending technique
Q-switched oscillation in thulium-doped fiber lasers using preloaded dynamic microbending technique
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DOI：
10.1007/s00340-017-6875-8
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
H. Sakata;N. Takahashi;Y. Ushiro
中科院分区：
文献类型：
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作者：
H. Sakata;N. Takahashi;Y. Ushiro
我们演示了调Q脉冲产生掺铥光纤激光器通过引入压电驱动的微弯与预加载应力。我们采用了一对波纹芯片，每个连接在压电致动器（PA），以夹持光纤在环形激光谐振腔。掺铥光纤由波长为1.63 μm的半导体激光器抽运，通过关断功率放大器产生波长约为1.9 μm的调Q激光脉冲。通过优化功率放大器的预加载和关断周期，提高了激光脉冲的输出性能。在161 mW的泵浦功率下，获得了峰值功率为2.8 W，脉宽为900 ns的调Q脉冲。我们期望光纤内Q开关技术将为环境传感和医疗应用提供高效的激光系统。
We demonstrate Q-switched pulse generation in thulium-doped fiber lasers by introducing piezoelectric-driven microbend with preloaded stress. We employed a pair of corrugated chips each attached on piezoelectric actuators (PAs) to clamp the fiber in a ring laser resonator. The thulium-doped fiber is pumped by a laser diode emitting at 1.63 μm and generates the Q-switched laser pulses at around 1.9 μm by switching off the PAs. The laser pulse performance is improved by optimizing the preload and switch-off period for the PAs. The Q-switched pulses with a peak power of 2.8 W and a pulsewidth of 900 ns are observed for a launched pump power of 161 mW. We expect that the in-fiber Q-switching technique will provide efficient laser systems for environmental sensing and medical applications.