一种基于沃拉斯顿棱镜的多角度激光分束方法

A new splitting method of laser beam based on Wollaston prisms

提出一种基于沃拉斯顿棱镜的多角度激光分束方法。利用沃拉斯顿棱镜和双透镜组合,将飞秒激光单脉冲分束为多角度传输、具有飞秒或者更长时间间隔的多个激光脉冲;分束角度调节灵活,能量利用率高,结构简单。采用本文方法搭建了飞秒激光超快全息记录系统,并记录了4路复用的干涉条纹。实验结果表明,本文所提出的分束系统可以应用于超快全息记录系统。

Focusing on the growing demands for number and quality of laser beams, a novel method of laser beams splitting based on Wollaston prisms is proposed. In this method, a single femtosecond laser pulse beam is transformed into pulses of multi-angle transmission with femtoseeond or longer interval u- sing Wollaston prisms and two lenses. The angles of laser beams splitting can be adjusted flexibly, the energy utilization rate is high,and its structure is simple. A setup of femtosecond laser holographic recording system is constructed on the basis of the approach, and the four-way multiplexing interference fringes are recorded. The experimental results show that the proposed system can be applied in ultrafast holographic recording system.