基于相位调制的光谱控制系统设计

Design of Spectrum Control System Based on Phase Modulation

摘要:

光纤激光系统目前有着较为广泛的应用，而针对不同的应用场景，对于系统的输出光谱线宽有着不同的需求；为了解决同一套系统可以同时满足不同应用场景的需求，对光纤激光系统光谱控制技术进行了研究；设计并搭建了基于噪声调制激光相位的光谱控制系统，并对该研究方向进行了理论仿真实验，构建了基于相位调制激光光谱控制的理论仿真模型；同时在硬件上应用射频放大技术实现了高功率白噪声的产生，应用高精度温控驱动对系统内部模块的温度进行精准控制，应用高精度功率驱动使系统输出光功率精准可调，既保证系统整体的稳定性，又保证系统精准的调谐能力，经过实验验证实现了输出激光线宽从10GHz~100GHz的宽可调谐范围。

Abstract:

Fiber laser system is currently widely used, and for different application scenarios, there are different requirements for the output spectrum linewidth of the system. In order to solve the problem that the same system can meet the needs of different application scenarios at the same time, conducted research on fiber laser system spectrum control technology. Designed and built a spectrum control system based on noise modulated laser phase, conducted theoretical simulation experiments on this research direction, and constructed a theoretical simulation model based on phase modulated laser spectrum control. At the same time, radio frequency amplification technology is applied to the hardware to achieve the generation of high-power white noise, and high-precision temperature control driver is used to accurately control the temperature of the internal modules of the system. The application of high-precision power drive makes the system output optical power accurately adjustable, which not only ensures the overall stability of the system, but also ensures the precise tuning capability of the system. After experimental verification, a wide tunable range of output laser linewidth from 10 GHz to 100 GHz has been achieved.