A high pulse repetition frequency（PRF）, high energy Ho：YAG laser directly pumped by a Tm-doped fiber laser and its application to a mid-infrared ZnGeP_2（ZGP） optical parametric oscillator（OPO） is demonstrated.T...A high pulse repetition frequency（PRF）, high energy Ho：YAG laser directly pumped by a Tm-doped fiber laser and its application to a mid-infrared ZnGeP_2（ZGP） optical parametric oscillator（OPO） is demonstrated.The maximum polarized 2.09 μm laser pulse energy is 13.46 mJ at a PRF of 1 k Hz. The corresponding peak power reaches 504 kW. In a double-resonant ZGP-OPO, a maximum mid-infrared laser pulse energy of 1.25 m J,corresponding to a peak power of 79 kW, is accomplished at a PRF of 3 kHz. The nonlinear conversion efficiency reaches 41.7%. The nonlinear slope efficiency reaches 53.3%.展开更多
In this work,we prepared ZnGeP2(ZGP)photocatalyst using single flat temperature zone(SFT)method in a vacuum quartz ampoule.The XRD,SEM,EDS,DRS and XPS were used to characterize the crystal structure,morphology,element...In this work,we prepared ZnGeP2(ZGP)photocatalyst using single flat temperature zone(SFT)method in a vacuum quartz ampoule.The XRD,SEM,EDS,DRS and XPS were used to characterize the crystal structure,morphology,elemental content,optical absorption and band gap structure of ZGP.The results of photocatalytic hydrogen evolution and apparent quantum efficiency show that ZGP is a promising photocatalyst for hydrogen production both under visible and near-infrared light irradiation.In addition,it is also found that adding the common stabilizer H3PO2 and ultrasonic treatment can efficiently improve the photocatalytic activity and stability of ZGP.展开更多
基金Supported by the National Natural Science Foundation of China Grant No 10604040, SRF for ROCS, SEM, the YSRF of Shanxi Grant No 2007021002, the Oversea Science Foundation of Shanxi, the Air Force Office of Scientific Research （USA） under Grant No F49620-03-1-0010
文摘对称分析和一个简单的摇契约模型为 V-Zn (-) 被介绍。在 ZnGeP2，识别能自然地在二个在附近附近的 P 原子上解释缺点波浪功能的本地化，，的可能的 Jahn 出纳失真机制为电子推出了原子双回声实验。
基金supported by the National Natural Science Foundation of China(No.61275146)the National Key Research and Development Program of China(No.2016YFB0402104)
文摘A high pulse repetition frequency（PRF）, high energy Ho：YAG laser directly pumped by a Tm-doped fiber laser and its application to a mid-infrared ZnGeP_2（ZGP） optical parametric oscillator（OPO） is demonstrated.The maximum polarized 2.09 μm laser pulse energy is 13.46 mJ at a PRF of 1 k Hz. The corresponding peak power reaches 504 kW. In a double-resonant ZGP-OPO, a maximum mid-infrared laser pulse energy of 1.25 m J,corresponding to a peak power of 79 kW, is accomplished at a PRF of 3 kHz. The nonlinear conversion efficiency reaches 41.7%. The nonlinear slope efficiency reaches 53.3%.
基金the National Natural Science Foundation of China(Grant Nos.21832005,51602179,51972195,21972078,and U1832145)the Major Special Projects of Shandong Province(public welfare,2019GGX103026)。
文摘In this work,we prepared ZnGeP2(ZGP)photocatalyst using single flat temperature zone(SFT)method in a vacuum quartz ampoule.The XRD,SEM,EDS,DRS and XPS were used to characterize the crystal structure,morphology,elemental content,optical absorption and band gap structure of ZGP.The results of photocatalytic hydrogen evolution and apparent quantum efficiency show that ZGP is a promising photocatalyst for hydrogen production both under visible and near-infrared light irradiation.In addition,it is also found that adding the common stabilizer H3PO2 and ultrasonic treatment can efficiently improve the photocatalytic activity and stability of ZGP.
