Title :
Measurements of laser temporal profile and polarization-dependent quantum efficiency
Author :
Yan, Lixin ; Du, Yingchao ; Huang, Wenhui ; Tang, Chuanxiang ; Lin, Yuzheng ; Cheng, Jianping
Author_Institution :
Tsinghua Univ., Beijing
Abstract :
The ultrashort ultraviolet (UV) laser system and the optical transport line for driving the photocathode RF gun at Accelerator Laboratory of Tsinghua University are introduced in the article. Temporal profile of the UV pulse was measured by non-colinear difference frequency generation (DFG) between the UV pulse itself and the jitter-free residual IR laser pulse after third harmonic generation (THG) process. Experiments to measure the dependence of quantum efficiency (QE) on laser polarization state are also performed. Results show that in our case the ratio of QE between p- and s- polarization is more than 2.6.
Keywords :
laser variables measurement; light polarisation; optical harmonic generation; photocathodes; solid lasers; Accelerator Laboratory of Tsinghua University; DFG; THG process; jitter-free residual IR laser pulse; laser polarization state; laser temporal profile measurements; noncolinear difference frequency generation; optical transport line; p-polarization; photocathode RF gun; quantum efficiency; s-polarization; third harmonic generation; ultrashort ultraviolet laser system; Cathodes; Frequency measurement; Laboratories; Nonlinear optics; Optical harmonic generation; Optical polarization; Optical pulse generation; Performance evaluation; Pulse measurements; Radio frequency;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440979
