Femtosecond mode-locked laser at 1.5 μm region using topological semimetals NbAs nanosheets
Femtosecond mode-locked laser at 1.5 μm region using topological semimetals NbAs nanosheets
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DOI：
10.1016/j.optlastec.2024.110784
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发表时间：
2024-03-01
影响因子：
5
通讯作者：
Chen，Li
中科院分区：
文献类型：
--
作者：
Li，Zhen;Long，Hui;Chen，Li
For the first time, NbAs nanosheets are used as a saturable absorber for fiber laser mode locking, achieving high efficiency saturation absorption. NbAs nanosheets are prepared through a liquid-phase exfoliation method, and the following nonlinear optical testing is performed with a self-built twin balanced detection device, with a modulation depth of 3.92 %. Additionally, NbAs nanosheets are embedded in erbium-doped fiber laser as saturable absorber to produce stable laser output with excellent performance. NbAs nanosheets based saturable absorber can achieve a pulse width of 640 fs. Compared with other topological materials, weyl semi-metal NbAs nanosheets based saturable absorber shows narrower pulses and broader linewidths. Those results hold significant importance for exploring the potential applications of NbAs in ultrafast fiber lasers.
