Velocity Measurement Based on Laser Doppler Effect

A novel method for velocity measurement is presented. In this scheme, a parallel-linear-polarization dual- frequency laser is incident on the target and senses the target velocity with both the frequencies, which can increase the maximum measurable velocity significantly. The theoretical analysis and verification experiment of the novel method are presented, which show that high-velocity measurement can be achieved with high precision using this method.     

基于角锥棱镜的非平面单频环形腔本征态分析

对基于角锥棱镜的非平面单频环行激光器的本征态问题进行了详细讨论,通过参考光线研究了该环形腔的光路闭合情况.腔内允许存在的四个本征椭圆偏振态,由于模式竞争,最终仅存一个本征模式振荡,从而实现单频运转.通过对腔内环路矩阵结构的分析,得出该环形腔中线偏振模式的产生需要系统的光路结构对称.对角锥棱镜的圆柱部分施加磁场,随着磁场的增大,对称光路结构中的本征态结构发生变化,并在适当磁场处出现线偏振模式.     

角锥型全固态非平面环形激光器473 nm单频运转

提出并实现了由热键合直角棱镜与角锥棱镜构成的新型946 nm及473 nm单频非平面环形激光器.直角棱镜由无掺杂的YAG晶体和2 mm厚的Nd∶YAG晶体热键合形成,可提供激光增益、光路闭合及对946 nm激光起偏等多种复合功能.角锥棱镜由熔融石英材料构成,在环形永磁铁作用下,提供法拉第旋转作用.实验上实现了该结构的946 nm腔内倍频,并获得了473 nm单频单向激光输出.     

角锥型全固态非平面环形激光器473 nm单频运转

提出并实现了由热键合直角棱镜与角锥棱镜构成的新型946 nm及473 nm单频非平面环形激光器.直角棱镜由无掺杂的YAG晶体和2 mm厚的Nd∶YAG晶体热键合形成,可提供激光增益、光路闭合及对946 nm激光起偏等多种复合功能.角锥棱镜由熔融石英材料构成,在环形永磁铁作用下,提供法拉第旋转作用.实验上实现了该结构的946 nm腔内倍频,并获得了473 nm单频单向激光输出.