Multilayer black phosphorus as saturable absorber for an Er:Lu_2O_3 laser at ∼3 μm

• DOI: 10.1364/prj.4.000181
• Publication Date: 2016-09-02T13:59:35Z
• Authors: Mingqi Fan; Tao Li; Shengzhi Zhao; Guiqiu Li; Xiaochun Gao; Kejian Yang; Dechun Li; Christian Kränkel
• Keywords: Saturable absorption; Exfoliation joint; Black Phosphorus; Pulse duration; Q-switching

Multilayer black phosphorus (BP) nanoplatelets of different thicknesses were prepared by the liquid phase exfoliation method and deposited onto yttrium aluminum garnet substrates to form saturable absorbers (SAs). These characterized with respect their thickness-dependent absorption properties at 3 μm. The BP-SAs employed in a passively Q-switched Er:Lu2O3 laser 2.84 μm. By using BP exfoliated solvents, stable pulses as short 359 ns generated an average output power up 755 mW. repetition rate experiment was 107 kHz, corresponding pulse energy 7.1 μJ. results prove that have great potential for optical modulation mid-infrared range.