Source: http://www.opticsjournal.net/Articles/Abstract?aid=OJ180831000011PmSpVr
Timestamp: 2019-04-20 19:06:07+00:00

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We experimentally demonstrate a long-term stable two-dimensional saturable absorption material under ambient conditions—multi-layer antimonene feasible for the mid-infrared spectral region—for the first time to our knowledge. The multi-layer antimonene material prepared using a liquid-phase exfoliation method was coated on a quartz/CaF2 for characterizations and an Au mirror as a reflection-type saturable absorber (SA) device. It has a modulation depth of 10.5%, a saturation peak intensity of 0.26 GW/cm2, and a non-saturation loss of 19.1% measured at 2868.0 nm using the typical power-dependent method. By introducing the SA device into a linear-cavity Ho3+/Pr3+-codoped fluoride fiber laser at 2865.0 nm, stable Q-switched pulses were obtained. It generated a maximum output power of 112.3 mW and pulse energy of 0.72 μJ, while the shortest pulse duration and largest repetition rate were 1.74 μs and 156.2 kHz, respectively. The long-term stability of the SA device was also checked using the same laser setup within 28 days. The results indicate that multi-layer antimonene is a type of promising long-term stable SA material under ambient conditions that can be applied in the mid-infrared spectral region.
基金项目：National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61722503, 61435003, 61421002); Open Fund of Science and Technology on Solid-State Laser Laboratory; Fundamental Research Funds for the Central Universities (ZYGX2016J068); International Scientific Cooperation Project of Sichuan Province (2017HH0046); National Key R&D Program of China (YS2018YFB110012); Natural Science Foundation of Zhejiang Province10.13039/501100004731 (LQ18A040004).
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