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Active Q switching of a fiber laser with a microsphere resonator

机译:具有微球谐振器的光纤激光器的主动Q切换

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摘要

We propose and demonstrate an active Q-switched fiber laser using a high-Q microsphere resonator as the Q-switching element. The laser cavity consists of an Er-doped fiber as the gain medium, a glass microsphere reflector (coupled through a fiber taper) at one end of the cavity, and a fiber Bragg grating reflector at the other end. The reflectivity of the microsphere is modulated by changing the gap between the microsphere and the fiber taper. Active Q switching is realized by oscillating the microsphere in and out of contact with the taper. Using this novel technique, we have obtained giant pulses (maximum peak power approx102 W, duration approx160 ns) at a low pump-power threshold (approx3 mW).
机译:我们提出并演示了使用高Q微球谐振器作为Q开关元件的有源Q开关光纤激光器。激光腔由掺Er光纤作为增益介质,在腔的一端有一个玻璃微球反射器(通过光纤锥耦合),在另一端有一个布拉格光栅反射器。微球的反射率是通过改变微球和纤维锥度之间的间隙来调节的。主动Q切换是通过使微球体与锥体接触和不接触而实现的。使用这种新颖的技术,我们以低的泵浦功率阈值(约3 mW)获得了巨脉冲(最大峰值功率约102 W,持续时间约160 ns)。

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