High-efficiency passively Q-switched neodymium-doped fiber laser operation at 1360.61 nm with bismuth selenide as saturable absorber

A high-efficiency Bi2Se3-based passively Q-switched Nd-doped fiber laser was demonstrated. The passively Q-switched operation produced a maximum average output power of 21.7 mW under a pulse repetition rate of 195.3 kHz, corresponding to a pulse energy of 111.2 nJ, which is much higher than the results obtained previously. Our results proved that CVD-Bi2Se3 is an excellent candidate for demonstrating large-energy pulse operations. In addition, this is the first demonstration focusing on the application of 2D materials for obtaining pulse fiber laser operation within a 1.3 µm region.