物理学报Issue(13)：1-6,6.DOI:10.7498/aps.63.134205
780W全光纤窄线宽光纤激光器
780 W narrow linewidth all fib er laser
张利明 1张浩彬 1周寿桓 1赵鸿 1张昆 1郝金坪 1张大勇 1朱辰 1李尧 1王雄飞1
作者信息
- 1. 固体激光技术重点实验室，北京 100015
- 折叠
摘要
Abstract
High-power narrow linewidth fiber lasers are extensively applied in coherent detection and power-spectrum beam combination etc. The suppressing method of stimulated Brillouin scattering is analyzed. And the theory of sinusoidal phase modulation is analyzed also. A single frequency laser is broadened to become a 2.9 GHz linewidth seed by sinusoidal phase modulation technology. The power of the seed is then boosted from 50 mW to 780 W through a three-stage power amplifiber configuration. Central wavelength and linewidth of the laser are 1064.34 nm and 2.9 GHz respectively, with an optical-optical efficiency being 79%. And the beam quality is M 2x =1.44 and M 2y =1.43. The output powers before and after phase modulation are compared with each other. And the reason why output power increases is analyzed. The stimulated Brillouin scattering threshold is promoted by added longitudinal mode. Finally, the output power is promoted after phase modulation, so that the output power of this laser is only limited by the pump power. If the pump power is increased, the higher output power of narrow linewidth fiber laser will be achieved.关键词
光纤激光器/窄线宽/相位调制/近单模Key words
fiber laser/narrow linewidth/phase modulation/nearly single mode引用本文复制引用
张利明,张浩彬,周寿桓,赵鸿,张昆,郝金坪,张大勇,朱辰,李尧,王雄飞..780W全光纤窄线宽光纤激光器[J].物理学报,2014,(13):1-6,6.
