Abstract
We use optogalvanic method to measure the ionization degree in the hydrocarbon-free rubidium DPAL gain medium. The results show that the ionization degree increases as pump intensity and helium pressure increase, and presents rollover as rubidium concentration increases. A maximal ionization degree of has been obtained with pump intensity of , temperature of 150°C and helium pressure of 500 Torr. Theoretical estimation shows that energy pooling is the main process rather than photoexcitation for the subsequent ionization processes.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Xiaofan Zhao, Zining Yang, Weihong Hua, Hongyan Wang, and Xiaojun Xu
Opt. Express 25(8) 9458-9470 (2017)
Lun Ge, Weihong Hua, Hongyan Wang, Zining Yang, and Xiaojun Xu
Opt. Lett. 38(2) 199-201 (2013)
Rui Wang, Zining Yang, Hongyan Wang, and Xiaojun Xu
Opt. Lett. 42(4) 667-670 (2017)