Pawliszewska Maria, Martynkien Tadeusz, Przewłoka Aleksandra, Sotor Jarosław
Opt Lett. 2018 Jan 1;43(1):38-41. doi: 10.1364/OL.43.000038.
In this Letter, we demonstrate an all-fiber holmium-doped laser operating in the stretched-pulse regime. As a result of dispersion management, the laser is capable of generating 190 fs pulses with a bandwidth of 53.6 nm. The pulses centered at 2060 nm reach 2.55 nJ of energy. Mode-locking is achieved with a multilayer graphene saturable absorber (SA). The Letter also presents the measurement of group velocity dispersion of active (Nufern SM-HDF-10/130), passive (SMF28), and dispersion-compensating (Nufern UHNA4) fibers in a 1.8-2.1 μm range. To the best of our knowledge, this is the first report on an all-fiber, stretched-pulse laser operating beyond 2 μm with nanomaterial-based SA.
在本信函中，我们展示了一种工作在拉伸脉冲模式下的全光纤掺钬激光器。通过色散管理，该激光器能够产生带宽为53.6 nm的190 fs脉冲。中心波长为2060 nm的脉冲能量达到2.55 nJ。采用多层石墨烯可饱和吸收体（SA）实现锁模。本信函还给出了有源光纤（Nufern SM-HDF-10/130）、无源光纤（SMF28）和色散补偿光纤（Nufern UHNA4）在1.8 - 2.1μm范围内群速度色散的测量结果。据我们所知，这是关于基于纳米材料的可饱和吸收体的全光纤、拉伸脉冲激光器在2μm以上波段工作的首次报道。
