声光调Q纳秒脉冲全光纤超连续谱光源

基于声光调Q技术的纳秒脉冲光纤激光超连续谱光源系统为全光纤结构，使用普通的传能光纤作为超连续谱的产生介质，通过改变泵浦功率和调制频率，可获得不同的超连续谱输出。实验结果表明：泵浦功率越大，调制频率越低，传能光纤越长，光谱展宽越宽。当传能光纤为200 m、调制频率为1 kHz、占空比为1.0%、泵浦功率为4.68 W时，获得谱线宽度超过700 nm的超连续谱输出。该系统可作为超连续谱光源的一种参考方案。

Supercontinuum source using Q-switched all-fiber nanosecond pulsed laser based on acousto-optical modulation

The laser system based on Q-switched technique of acousto-optical modulation is all-fiber using passive fibers as media to generate supercontinuum, which can output different-width supercontinuum only by adjusting the pump power and repetition rate. With higher pump power, lower repetition rate, longer passive fiber, a wider supercontinuum is obtained. The supercontinuum range can be extended by splicing a passive fiber, and the supercontinuum width exceeds 700 nm when the passive fiber is 200 m long at 1 kHz modulation frequency, 1.0% duty and 4.68 W pump power. The all-fiber nanosecond pulsed laser has simple configuration with fully fiberized cavities without the need for free-space components, allowing for robust and compact system designs. Its parameters can be easily adjusted by the acousto-optical modulator, which greatly extends the applications in industrial deployment.