Alpha-In2se3 Wideband Optical Modulator For Pulsed Fiber Lasers

With the magnetron-sputtering deposition method, a phase indium selenide (alpha-In2Se3) was developed into a saturable absorber (SA) with wideband saturable absorption property at 800, 1560, and 1930 nm. After inserting the alpha-In2Se3 SA into erbium-doped fiber laser (EDFL) and thulium-doped fiber laser (TDFL) systems, we can easily obtain stable soliton pulse trains. The pulse duration/pulse energy/slope efficiency for EDFL and TDFL were 276 fs/2.03 nJ/15.8% and 1.02 ps/7.1 nJ/23.5%, respectively. These results showed that the MSD-grown alpha-In2Se3 could be regarded as high efficiency material to be applied in ultrafast photonics. (c) 2018 Optical Society of America