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首页> 外文会议>RIAO/OPTILAS 2004 >High-efficiency acoustic-induced Q-switched erbium doped fiber laser
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High-efficiency acoustic-induced Q-switched erbium doped fiber laser

机译：高效声致调Q掺光纤激光器

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摘要

We report a high efficiency and high repetition rate acoustic-induced Q-switched Er-doped-fiber laser. Two fiber Bragg gratings were used as cavity mirrors, whilst the active Q-Switching was performed by temporally controlling the Q-cavity factor by coupling light from the core mode to cladding modes using flexural acoustic waves. The acousto-optic attenuator was implemented by applying a RF signal to a piezoelectric disc and using an aluminum horn to focus the acoustic wave in a tapered fiber. The RF signal that drives the piezoelectric disc was amplitude modulated with a rectangular wave of variable frequency and duty cycle. Q-switched laser pulses of ～1 W peak power, 0.1-2 μs pulse width and continuously variable frequency up to 100 kHz, were obtained. The laser efficiency of energy conversion was as high as 20 %.
机译：我们报告了一种高效率和高重复频率的声诱导调Q掺Er光纤激光器。两个光纤布拉格光栅用作腔镜，而主动Q切换是通过使用弯曲声波将光从纤芯模式耦合到包层模式来临时控制Q腔因子来执行的。声光衰减器是通过将RF信号施加到压电盘上并使用铝制喇叭将声波聚焦在锥形光纤中来实现的。用可变频率和占空比的矩形波对驱动压电盘的RF信号进行幅度调制。获得了〜1 W峰值功率，0.1-2μs脉冲宽度和高达100 kHz的连续可变频率的Q开关激光脉冲。能量转换的激光效率高达20％。

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