By measuring Raman scattering spectra of KTiOPO_(4)(KTP)crystal with several configurations,we found the orientation of polarizability tensor in flux-grown KTP(KTP_(F))was perpendicular to the orientation of polarizab...By measuring Raman scattering spectra of KTiOPO_(4)(KTP)crystal with several configurations,we found the orientation of polarizability tensor in flux-grown KTP(KTP_(F))was perpendicular to the orientation of polarizability tensor in hydrothermally grown KTP(KTP_(H)).Fluorescent and Raman spectra of KTP were measured from room temperature to 4.2K.The appearance of peaks at 135cm^(-1) and 8OOcm^(-1) at 77K and the temperature dependence of Raman spectrum lines are discussed.展开更多
200keV Hg ions were implanted in potassium titanyl phosphate (KTiOPO4 or KTP) at different angles of 0°，45°,60°and 75°,The lateral spread of Hg ions in KTP was measured by Rutherford backscatterin...200keV Hg ions were implanted in potassium titanyl phosphate (KTiOPO4 or KTP) at different angles of 0°，45°,60°and 75°,The lateral spread of Hg ions in KTP was measured by Rutherford backscattering of 2.1 MeV He ions.The obtained results are compared with the transport of ions in matter(TRIM'89) prediction.The lateral spread is found in a good agreement with TRIM'89 prediction.展开更多
为实现1.06μm波长激光向人眼安全1.57μm激光的能量转移,同时在输出光束中保留原1.06μm波长的泵浦光,以得到双波长激光的混合输出。本文从光参量振荡器(OPO)的基本原理出发,对磷酸氧钛钾(KTP)晶体的光学参量振荡(OPO)获得重频双波长...为实现1.06μm波长激光向人眼安全1.57μm激光的能量转移,同时在输出光束中保留原1.06μm波长的泵浦光,以得到双波长激光的混合输出。本文从光参量振荡器(OPO)的基本原理出发,对磷酸氧钛钾(KTP)晶体的光学参量振荡(OPO)获得重频双波长激光输出的过程进行了理论分析和实验研究。采用内腔OPO(IOPO),工作在重频20 Hz下,获得了1.57μm和1.06μm双波长激光混合输出能量大于38 m J,其中1.57μm波长信号光20 m J,脉宽5 ns;1.06μm泵浦光18 m J,脉宽6 ns,并且波形未出现外腔OPO所观察到的中央凹陷,实验结果与理论分析相吻合。展开更多
The average power of a Pockels cell is limited by thermal effects arising from the optical absorption of the laser pulse. These thermal effects can be managed by configuring the switch as a plasma-electrode thin plate...The average power of a Pockels cell is limited by thermal effects arising from the optical absorption of the laser pulse. These thermal effects can be managed by configuring the switch as a plasma-electrode thin plate Pockels ceil, which works under heat-capacity operation. Simulation results show that, based on KD＊P （in thickness 0.5 cm） at an average power loading of 1 kW, the aperture integrated depolarization loss at 1.06 um is less than 10% in 5min working time.展开更多
In this paper,by comparing the three possible combinations of the basic structure unit TiO_(6) octahedra,a simple model is proposed to explain the cause of the formation of the bicrystal structure in KTiOPO_(4)(KTP)cr...In this paper,by comparing the three possible combinations of the basic structure unit TiO_(6) octahedra,a simple model is proposed to explain the cause of the formation of the bicrystal structure in KTiOPO_(4)(KTP)crystals.The theoretical morphology of KTP crystal is studied and the rate of the appearance possibilities of different faces are obtained.The relationships between bicrystal structure and crystal properties are discussed.展开更多
文摘通过1 064 nm激光泵浦KTP晶体光参量振荡(OPO)技术获得了高峰值功率2.7μm波段激光输出,对实验结果开展了详细的分析。泵浦源为电光调Q Nd:YAG激光器,光参量振荡器谐振腔采用单谐振结构,将两块相同的KTP晶体光轴相向放置以补偿走离效应,KTP晶体按?=0°,θ=62°切割以获得波长2.7μm波段激光输出,采用Ⅱ(B)类相位匹配(o→o+e)以利用较大的非线性系数。在泵浦能量为89 m J,脉宽10 ns的条件下,获得脉冲能量7.5 m J,波长2.67μm,脉宽8.5 ns的激光输出。
基金Project supported by the National Science Fundation of China。
文摘By measuring Raman scattering spectra of KTiOPO_(4)(KTP)crystal with several configurations,we found the orientation of polarizability tensor in flux-grown KTP(KTP_(F))was perpendicular to the orientation of polarizability tensor in hydrothermally grown KTP(KTP_(H)).Fluorescent and Raman spectra of KTP were measured from room temperature to 4.2K.The appearance of peaks at 135cm^(-1) and 8OOcm^(-1) at 77K and the temperature dependence of Raman spectrum lines are discussed.
基金Supported by National Natural Science Fundation of China
文摘200keV Hg ions were implanted in potassium titanyl phosphate (KTiOPO4 or KTP) at different angles of 0°，45°,60°and 75°,The lateral spread of Hg ions in KTP was measured by Rutherford backscattering of 2.1 MeV He ions.The obtained results are compared with the transport of ions in matter(TRIM'89) prediction.The lateral spread is found in a good agreement with TRIM'89 prediction.
文摘为实现1.06μm波长激光向人眼安全1.57μm激光的能量转移,同时在输出光束中保留原1.06μm波长的泵浦光,以得到双波长激光的混合输出。本文从光参量振荡器(OPO)的基本原理出发,对磷酸氧钛钾(KTP)晶体的光学参量振荡(OPO)获得重频双波长激光输出的过程进行了理论分析和实验研究。采用内腔OPO(IOPO),工作在重频20 Hz下,获得了1.57μm和1.06μm双波长激光混合输出能量大于38 m J,其中1.57μm波长信号光20 m J,脉宽5 ns;1.06μm泵浦光18 m J,脉宽6 ns,并且波形未出现外腔OPO所观察到的中央凹陷,实验结果与理论分析相吻合。
基金Supported by the Science Foundation of CAEP under Grant No 20050436.
文摘The average power of a Pockels cell is limited by thermal effects arising from the optical absorption of the laser pulse. These thermal effects can be managed by configuring the switch as a plasma-electrode thin plate Pockels ceil, which works under heat-capacity operation. Simulation results show that, based on KD＊P （in thickness 0.5 cm） at an average power loading of 1 kW, the aperture integrated depolarization loss at 1.06 um is less than 10% in 5min working time.
基金Supported by a grant for Key Research Projection Climbing Program from the State Science and Technology Commission of China。
文摘In this paper,by comparing the three possible combinations of the basic structure unit TiO_(6) octahedra,a simple model is proposed to explain the cause of the formation of the bicrystal structure in KTiOPO_(4)(KTP)crystals.The theoretical morphology of KTP crystal is studied and the rate of the appearance possibilities of different faces are obtained.The relationships between bicrystal structure and crystal properties are discussed.
