Nd:YAG脉冲激光器双光路时分复用系统研究

Nd:YAG Pulsed Laser Double-Pass Time-Sharing Multiplexing System

为满足多光路、多工位激光加工需求,采用Nd:YAG脉冲激光器为光源,研制出激光器双光路时分复用系统。提出了时分复用的具体实施方案,设计出能够实现时分复用分光的可控30°旋转分光装置以及对装置的工作状态实现实时控制的时分复用控制电路,并确定了系统的工作时序。最终在不降低输出功率的前提下,实现了激光的时分复用、双光路输出。实验利用能量计采集数据,对光路耦合效率进行计算,实验表明,在电流为50A、脉宽为4ms、能量为7.3J时,A路耦合效率为85.21%,B路耦合效率为85.23%,满足多工位加工需求。最后结合实际应用,将所设计的两光路,一路用于焊接,一路用于熔覆。

In order to satisfy the need of multi-pass and multi-station laser processing, Nd： YAG pulsed laser is chosen as the light source and the laser double-pass time-sharing multiplexing system is developed. A concrete implementation scheme for time-sharing multiplexing is put forward, and in order to achieve time-sharing multiplexing beam splitting, controllable 30~ revolving beam splitting device is designed, besides, a time-sharing multiplexing control circuit is designed to achieve real-time control of the device, and the system working time sequence is determined. In this way, time-sharing multiplexing and multi-pass output can be realized under the premise of not reducing the output power. Energy meter is used to collect data for calculating the light path coupling efficiency. The results of experiments show that when the current is 50 A and pulse width is 4 ms, the coupling efficiency of path A is 85.21% and that of path B is 85.23%, in the state of which the demand of multi-station processing can be met. And combined with practical applications, two splitting light paths are designed, one is used for welding and the other for melting and coating.