Ultrafast optical beam deflection in a pump probe configuration

• Published in: Chinese physics B Vol. 25; no. 9; pp. 268 - 275
• Main Author: 梁玲亮 田进寿 汪韬 吴胜利 李福利 王俊锋 高贵龙
• Format: Journal Article
• Language: English
• Published: 01.09.2016
• Subjects: 亥姆霍兹方程; 光束偏转; 分辨特性; 探测装置; 时间分辨率; 材料色散; 泵浦; 群速度色散
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/25/9/090602

Propagation of a signal beam in an Al Ga As/Ga As waveguide multiple-prism light deflector is theoretically investigated by solving the scalar Helmholtz equation to obtain the dependences of the temporal and spatial resolvable characteristics of the ultrafast deflector on the material dispersion of Ga As including group velocity dispersion and angular dispersion,interface reflection,and interface scattering of multiple-prism deflector.Furthermore,we experimentally confirm that,in this ultrafast beam deflection device,the deflecting angle of the signal light beam is linear with the pump fluence and the temporal resolution of the ultrafast deflection is 10 ps.Our results show that the improvement of the temporal and spatial resolvable performances is possible by properly choosing the structural parameters and enhancing the quality of the device.