In this paper, lawsone (2-hydroxy-1,4-naphthoquinone), a natural dye material is proposed and demonstrated as a saturable absorber (SA) for passive Q-switching operation in Erbium-doped fiber laser (EDFL) cavity. The lawsone-based SA was fabricated using a liquid-phase exfoliation technique. A tiny piece of the lawsone film was then cut and slot-in between two fiber ferrules so that it can easily be incorporated into a laser cavity as a Q-switcher. A stable Q-switched pulse train operation was observed with the repetition rate of 80 kHz and pulse width as narrow as 1.7 µs at 1564 nm wavelength. The maximum pulse energy and average power were obtained to be 53 nJ and 4.3 mW, respectively. The results indicate that the lawsone material can be a suitable SA for Q-switched pulse laser operating at the 1.5-µm region. To the best of our knowledge, this is the first time lawsone material is utilized as a SA device for generating Q-switched pulse.

在本文中，提出并证明了天然染料材料拉索酮（2-羟基-1,4-萘醌），并作为掺Er光纤激光器（EDFL）腔中被动Q切换操作的可饱和吸收剂（SA）。使用液相剥离技术制造了基于Lawone的SA。然后，将一小片Lawone薄膜切开并插入两个光纤插芯之间，以便可以轻松地将其作为Q切换器并入激光腔中。观察到稳定的Q开关脉冲序列操作，其重复频率为80 kHz，在1564 nm波长处的脉冲宽度窄至1.7 µs。获得的最大脉冲能量和平均功率分别为53 nJ和4.3 mW。结果表明，该Lawone材料可以作为在1.5 µm区域工作的Q开关脉冲激光器的合适SA。据我们所知，