Liu Pei, Zhang Zhaowei
Opt Lett. 2019 Aug 15;44(16):3988-3991. doi: 10.1364/OL.44.003988.
We report a broadband optical parametric oscillator (OPO) pumped by a Yb-doped fiber laser system. By utilizing a 300 μm long magnesium-doped periodically poled LiNbO crystal as the parametric gain medium and configuring the OPO as a chirped-pulse oscillator, we obtained mid-infrared emission having an instantaneous bandwidth covering 3084-4466 nm. This result represents, to the best of our knowledge, the widest instantaneous bandwidth obtained from a Yb-fiber-laser-pumped singly resonant OPO, demonstrating the immense potential of chirped-pulse oscillation in scaling the instantaneous bandwidth of ultra-fast OPOs. Moreover, we performed a numerical simulation of chirped-pulse OPOs (CPOPOs) and revealed that the spectral profile of the output from a CPOPO was relevant to both the parametric gain profile of the nonlinear crystal and the intra-cavity high-order dispersion.
我们报道了一种由掺镱光纤激光系统泵浦的宽带光学参量振荡器（OPO）。通过使用一块300μm长的掺镁周期极化铌酸锂晶体作为参量增益介质，并将OPO配置为啁啾脉冲振荡器，我们获得了覆盖3084 - 4466nm的瞬时带宽的中红外发射。据我们所知，该结果代表了从掺镱光纤激光泵浦的单谐振OPO获得的最宽瞬时带宽，证明了啁啾脉冲振荡在扩展超快OPO瞬时带宽方面的巨大潜力。此外，我们对啁啾脉冲OPO（CPOPO）进行了数值模拟，并揭示了CPOPO输出的光谱轮廓与非线性晶体的参量增益轮廓和腔内高阶色散都有关。
