Theoretical analyses for an alkali laser pumped by a pulsed light source

Diode-pumped alkali lasers (DPALs) have drawn much attention since they were proposed in 2001. Until now, most theoretical studies have related to the DPALs pumped by a continuous wave or a square-wave light source, but the theoretical reports for a DPAL pumped by a pulsed source still keep rare. In this study, the authors set up a kinetic model for a pulsed DPAL with the high energy transition and ionization processes taken into account. The spontaneous emission that coupled with the lasing mode is theoretically analyzed in the simulation. Additionally, the authors improve the algorithm to simulate the averaged laser intensity in time domain. Our theoretical results and experimental data in two published literatures coincide with each other and the correctness of our kinetic model can be demonstrated. The study should be useful for the design of an efficient pulse-pumped DPAL.