双波长泵浦铯原子窄线宽激光的理论研究

Theoretical Study of Dual-Wavelength-Pumped Cesium Atom Narrow Linewidth Laser

为了进一步优化铯原子1469.9 nm激光的线宽,提出利用455.5 nm和1360.6 nm激光共同泵浦铯原子的方案.研究了铯原子能级布居几率随455.5 nm和1360.6 nm激光拉比频率的变化,模拟了455.5 nm和1360.6 nm泵浦光作用下,1469.9 nm激光线宽随腔损率、输出激光功率的变化.计算结果表明,相比只用455.5 nm激光泵浦,布居几率提高很多.

In order to further optimize the linewidth of Cesium atom 1469.9 nm laser,this paper proposed to use 455.5 nm and 1360.6 nm laser to jointly pump Cesium atom.The relationship between the population probability of Cesium atomic energy level and 455.5 nm and 1360.6 nm laser Rabi frequency was studied in detail,and the variation of 1469.9 nm laser linewidth with cavity loss rate and output laser power was simulated under the condition of 455.5 nm and 1360.6 nm pump light.Calculations showed that compared to using only 455.5 nm laser pumping,using 455.5 nm and 1360.6 nm laser pumping has a much higher population probability.