Chinese Optics Letters, 2017, 15 (11): 111401, Published Online: Jul. 19, 2018
Population inversion in sodium D 2 transition based on sodium-ethane excimer pairs
Abstract
Sodium-ethane excimer pairs are studied and proved to be a great choice of excimer pumped sodium laser (XPNaL) gain media. The lifetime of the sodium D 2 line is studied in a sodium-ethane excimer system excited by a 553 nm laser, and the observed phenomenon of lifetime lengthening is discussed. Amplified spontaneous emission (ASE) of the sodium D 2 line is successfully obtained, and its time-resolved and spectroscopic characteristics are studied experimentally. According to the intensity of the ASE signal under different sodium vapor atom densities, the sodium D 2 line gain feature of sodium-ethane excimer pairs excited by the 553 nm laser is concluded.
Shu Hu, Baodong Gai, Jingwei Guo, Pengyuan Wang, Xueyang Li, Hui Li, Jinbo Liu, Shan He, Xianglong Cai, Dong Liu, Ying Chen, Fengting Sang, Yuqi Jin. Population inversion in sodium