Theoretical research of time dependent pulsed diode-pumped Rb vapor laser

Abstract A time dependent 3D model for pulsed diode-pumped Rb vapor laser is established by using the methods of circular cutting and alternating-direction implicit (ADI). The model is validated by comparing with Zhao’s experiment. The spatiotemporal distributions of intensities of pump light and laser, and population densities of different energy levels are presented and discussed in a single-pulse diode-pumped Rb vapor laser. The lasing dynamics and characteristics of a multi-pulse diode-pumped Rb vapor laser are also calculated and analyzed, and results show that higher peak power and average power of each laser pulse can be obtained if the pump power is greater. Moreover, for constant pump pulse width, the peak power of subsequent laser pulses (in addition to the first pulse) increases with increasing time interval between two adjacent pump pulses. For constant time interval between two adjacent pump pulses, the large pump pulse width is not conducive to improving the peak power of subsequent laser pulses.