We report on a radially polarized and passively Q-switched Nd:YAG/Cr4 :YAG laser. The bulk Nd:YAG crystal is bonded with......

为解决光学系统中普遍存在的菲涅耳反射问题，提高光的透射率，设计了一种二维矩形SiO2光子晶体结构光栅。采用勒让德多项式展开法对该......