Alpha-phase indium selenide saturable absorber for a femtosecond all-solid-state laser
Alpha-phase indium selenide saturable absorber for a femtosecond all-solid-state laser
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发表时间：
2019
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通讯作者：
Ruihua Wang
中科院分区：
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作者：
xiaoli Sun;Jingliang He;Bingnan Shi;Baitao Zhang;Kejian Yang;Chengqing Zhang;Ruihua Wang
We successfully fabricated the high-quality few-layered.α-In2Se3 and investigated its carrier dynamics and nonlinear.optical absorption properties by pump–probe and openaperture Z-scan technologies. Intra- and inter-band relaxation times were determined to be 7.2 ps and 270 ps,.respectively, and the effective nonlinear absorption coefficient.was measured as βeff −3.9 × 103 cm∕GW (1064 nm)..Based on α-In2Se3 saturable absorber, a continuous-wave.mode-locking operation was realized. Pulse duration, repetition rate, and maximum output power were measured to be.352 fs, 42.4 MHz, and 0.56 W, corresponding to pulse energy.of 13.2 nJ and peak power of 37.5 kW. To the best of our.knowledge, this is the first demonstration of non-transition.metal chalcogenides applied in ultrafast all-solid-state bulk.lasers. This work well verified that α-In2Se3 should be a.promising optical modulator candidate for all-solid-state.lasers.
