High efficiency and high-energy intra-cavity beam shaping laser. (18th August 2015)

• Record Type: Journal Article
• Authors: Yang, Hailong; Meng, Junqing; Chen, Weibiao
• Is Part Of: Laser physics. Volume 25:Number 9(2015:Sep.)
• Publication Date: 2015-08-18
• Subjects: intra-cavity beam shaping -- flat-top beam -- radial birefringent element; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1054-660X/25/9/095005
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: We present a technology of intra-cavity laser beam shaping with theory and experiment to obtain a flat-top-like beam with high-pulse energy. A radial birefringent element (RBE) was used in a crossed Porro prism polarization output coupling resonator to modulate the phase delay radially. The reflectively of a polarizer used as an output mirror was variable radially. A flat-top-like beam with 72.5 mJ, 11 ns at 20 Hz was achieved by a side-pumped Nd:YAG zigzag slab laser, and the optical-to-optical conversion efficiency was 17.3%.