Zhang Yusheng, Huang Lin, Cui Yudong, Liu Xueming
Opt Lett. 2020 Sep 1;45(17):4835-4838. doi: 10.1364/OL.394544.
Real-time measurement of ultrafast pulses together with high temporal resolution and long recording length is an urgent requirement of all optical communication systems and nonlinear science. Here, external motion dynamics of soliton pairs in mode-locking ultrafast fiber lasers can be single-shot characterized with long recording length, by using an asynchronous four-wave-mixing (FWM)-based temporal magnifier (AFTM) system. Recording length of more than one thousand roundtrips can be achieved through the AFTM system. Temporal propagation dynamics of soliton pairs with tunable separations are observed, revealing that soliton pairs with narrower separation display vibration-like dynamics, while the two solitons with wider separation remain relatively unchanged. We believe our results will provide a promising solution for real-time measurement of ultrafast pulse and can offer novel insights for ultrafast transient dynamics in nonlinear optics.
对超快脉冲进行具有高时间分辨率和长记录长度的实时测量是所有光通信系统和非线性科学的迫切需求。在此，通过使用基于异步四波混频（FWM）的时间放大镜（AFTM）系统，可以单次表征锁模超快光纤激光器中孤子对的外部运动动力学，且记录长度很长。通过AFTM系统可实现超过一千次往返的记录长度。观察到具有可调间距的孤子对的时间传播动力学，结果表明间距较窄的孤子对呈现类似振动的动力学，而间距较宽的两个孤子则相对保持不变。我们相信我们的结果将为超快脉冲的实时测量提供一个有前景的解决方案，并能为非线性光学中的超快瞬态动力学提供新的见解。
