脉宽为41飞秒的石墨烯锁模Cr:ZnS激光器。

Graphene mode-locked Cr:ZnS laser with 41 fs pulse duration.

作者信息

Tolstik Nikolai, Sorokin Evgeni, Sorokina Irina T

出版信息

Opt Express. 2014 Mar 10;22(5):5564-71. doi: 10.1364/OE.22.005564.

DOI:10.1364/OE.22.005564

Abstract

We report the ultrashort-pulse Cr:ZnS laser mode-locked by graphene-based saturable absorber mirror. Using the combination of bulk material and a chirped mirror, we demonstrate the shortest reported so far mid-IR pulses of only 5.1 optical cycles (41 fs) centered at 2.4 µm with 190 nm spectral bandwidth. The pulse spectrum almost completely fills the water-free atmospheric window. The output parameters reach 2.3 nJ pulse energy and 250 mW average output power at 108 MHz repetition rate.

摘要

我们报道了基于石墨烯的可饱和吸收镜锁模的超短脉冲Cr:ZnS激光器。通过结合块状材料和啁啾镜，我们展示了迄今为止报道的最短的中红外脉冲，仅5.1个光学周期（41飞秒），中心波长为2.4 µm，光谱带宽为190 nm。脉冲光谱几乎完全覆盖了无水大气窗口。在108 MHz重复频率下，输出参数达到2.3 nJ脉冲能量和250 mW平均输出功率。