National Engineering Center for Laser Processing, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
Fig. 7. Burned patterns of acrylic. (a) Laser burned pattern of resonator of combined axicon; laser burned pattern with a polarizer, the polarization directions of the resonator are (b) vertical, (c) horizontal, (d) at 135° direction and (e) at 45° direction, respectively