Design and analysis of spectral beam combining system for fiber lasers based on a concave grating

• Published in: Optoelectronics letters Vol. 8; no. 1; pp. 33 - 36
• Main Author: 吴卓亮 赵尚弘 楚兴春 张茜 占生宝 马丽华
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University of Technology 2012
• Subjects: Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; 凹面光栅; 基础; 掺镱光纤激光器; 激光光谱; 系统; 组束; 结构设计; 频谱; Fiber Laser; Volume Bragg Grating; Waist Radius; Diffraction Efficiency; Gain Bandwidth
• ISSN: 1673-1905; 1993-5013
• DOI: 10.1007/s11801-012-1093-4

A novel fiber laser spectral beam combining scheme based on a concave grating is presented. The principle of the presented system is analyzed, and a concave grating with blazed structure for spectral beam combining is designed. The combining potential of the system is analyzed, and the results show that 39 Yb-doped fiber laser can be spectrally beam combined via the designed system. By using scalar diffraction theory, the combining effect of the system is analyzed. The results show that the diffraction efficiency of the designed concave grating is higher than 72% over the whole gain bandwidth, and the combining efficiency is 73.4%. With output power of 1 kW for individual fiber laser, combined power of 28.6 kW can be achieved.