利用脉宽为200 ns, 重复频率为3.3 kHz, 功率可调的声光调Q激光器抽运高非线性的光子晶体光纤, 产生了覆盖600 nm到1500 nm展宽的超连续谱(SC), 分析了其产生的原因。研究表明, 在零色散波长抽运时, 光谱展宽以自相位调制为主, 同时三阶色散的影响显著, 传输脉冲发生振荡。研究还发现, 抽运光的峰值功率越高, 得到的超连续谱现象越明显, 展宽越宽。

The supercontinuum (SC) from 600 nm to 1500 nm is generated in the highly nonlinear photonic crystal fiber, pumped by acoustic-optic Q-switch pulses with a duration of 200 nm, a repetition rate of 3.3 kHz and tunable power. And the generation causes are also analysised. It is shown that when the pump wavelength overlaps with the zero- dispersion wavelength self-phase modulation and third-order dispersion plays an important role, the propagating pulses will oscillate. With the increasing of the peak power of pump pulse , the pectral width becomes wider.