School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore.
Opt Lett. 2011 Jun 1;36(11):2089-91. doi: 10.1364/OL.36.002089.
We present an all-fiber bidirectional passively mode-locked soliton laser with what we believe is a novel cavity configuration. Using a four-port circulator, we incorporate two different semiconductor saturable absorber mirrors (SESAMs) into the laser cavity, which enables bidirectional mode locking. The laser allows the generation of two independent countercirculating mode-locked pulse trains, each with an individual fundamental repetition rate that can be adjusted by varying the SESAM pigtail length. Two countercirculating pulse trains with repetition rates of 21.3 and 15.2 MHz are obtained simultaneously. By controlling the intracavity loss imposed on these two pulse trains, either one of the two pulse trains can be switched on or off. The bidirectional operation with other repetition rates is also demonstrated.
我们提出了一种全光纤双向被动锁模孤子激光器，其腔结构具有新颖性。我们使用四端口环形器将两个不同的半导体可饱和吸收镜（SESAMs）集成到激光腔中，从而实现双向锁模。该激光允许产生两个独立的反向循环锁模脉冲串，每个脉冲串的基本重复率都可以通过改变 SESAM 尾纤长度来调节。我们同时获得了重复率为 21.3MHz 和 15.2MHz 的两个反向循环脉冲串。通过控制施加在这两个脉冲串上的腔内损耗，可以打开或关闭其中一个脉冲串。我们还展示了其他重复率下的双向操作。
