Indium selenide(InSe)is a typical layered metal-chalcogenide semiconductor that has potential for developing ultrafast optoelectronic devices.In this work,InSe-polyvinyl alcohol(InSe-PVA)film is employed as saturable ...Indium selenide(InSe)is a typical layered metal-chalcogenide semiconductor that has potential for developing ultrafast optoelectronic devices.In this work,InSe-polyvinyl alcohol(InSe-PVA)film is employed as saturable absorber and prepared by mixing InSe nanosheets solution and polyvinyl alcohol solution.The nonlinear absorption properties of the InSe saturable absorber(InSe-SA)are investigated,showing that the nonsaturable absorption and modulation depth are 37.5%and 9.55%,respectively.Traditional soliton lasers are generated in erbium-doped fiber(EDF)laser-employed InSe as a mode-locker.The central wavelength and pulse duration of the traditional soliton pulse are 1568.73 nm and 2.06 ps,respectively,under a repetition rate of 1.731 MHz.The maximum average output power is 16.4 mW at the pump power of 413 mW.To the best of our knowledge,this is the first demonstration of a traditional soliton pulse with InSe as a mode-locker.The experimental results further demonstrate that InSe is an outstanding nonlinear absorption material in ultrafast fiber laser.展开更多
基金Project supported by the National Natural Science Foundation of China(Nos.11904213,11704226,and 11704227)。
文摘Indium selenide(InSe)is a typical layered metal-chalcogenide semiconductor that has potential for developing ultrafast optoelectronic devices.In this work,InSe-polyvinyl alcohol(InSe-PVA)film is employed as saturable absorber and prepared by mixing InSe nanosheets solution and polyvinyl alcohol solution.The nonlinear absorption properties of the InSe saturable absorber(InSe-SA)are investigated,showing that the nonsaturable absorption and modulation depth are 37.5%and 9.55%,respectively.Traditional soliton lasers are generated in erbium-doped fiber(EDF)laser-employed InSe as a mode-locker.The central wavelength and pulse duration of the traditional soliton pulse are 1568.73 nm and 2.06 ps,respectively,under a repetition rate of 1.731 MHz.The maximum average output power is 16.4 mW at the pump power of 413 mW.To the best of our knowledge,this is the first demonstration of a traditional soliton pulse with InSe as a mode-locker.The experimental results further demonstrate that InSe is an outstanding nonlinear absorption material in ultrafast fiber laser.
