This paper proposes a theoretical scheme to synthesize white laser source based on the cascaded sum frequency generation (CSFG) model with stimulated Raman adiabatic passage (STIRAP). In the CSFG model, the signal laser, intermediate laser and output laser correspond to red, green and blue (RGB) lasers respectively. The results show that in general the red laser is completely converted to the blue laser, and there is no apparent intermediate green laser. Moreover, under the counterintuitive order, the pump parameters have a wider adjustment range of system conversion efficiency than the coupling delay parameters. We synthesize the white laser source through the following steps. First, we change the pump intensity to roughly adjust the conversion efficiency of the system, and then vary the coupling delay parameters to fine-tune RGB lasers output power ratio. Compared with the scheme based on frequency conversion with Stark-chirped rapid adiabatic passage to synthesize white laser source, the RGB lasers output of the new scheme can achieve better stability. The results of the investigation can provide a theoretical foundation for the research of novel optical devices.

本文提出了一种基于级联和频生成（CSFG）模型与受激拉曼绝热通道（STIRAP）合成白色激光源的理论方案。在CSFG模型中，信号激光器、中间激光器和输出激光器分别对应红、绿、蓝（RGB）激光器。结果表明，一般情况下红色激光完全转换为蓝色激光，没有明显的中间绿色激光。而且，在违反直觉的顺序下，泵浦参数比耦合延迟参数具有更宽的系统转换效率调整范围。我们通过以下步骤合成白色激光源。首先，我们改变泵浦强度来粗略调整系统的转换效率，然后改变耦合延迟参数以微调 RGB 激光器输出功率比。与基于变频和Stark-chirp快速绝热通道合成白色激光源的方案相比，新方案的RGB激光器输出具有更好的稳定性。研究结果可为新型光学器件的研究提供理论基础。