强激光与粒子束2013，Vol.25Issue(8)：1893-1896,4.DOI:10.3788/HPLPB20132508.1893
kW级主振荡功率放大光纤激光器输出特性
Output characteristics of kW master-oscillator power amplifier fiber laser
张利明 1周寿桓 1赵鸿 1张昆 1张大勇 1朱辰 1梁琳 1李尧 1王雄飞1
作者信息
- 1. 华北光电技术研究所固体激光技术重点实验室,北京100015
- 折叠
摘要
Abstract
The method of controlling mode with which a single mode laser output is achieved under high power is analyzed.Using master-oscillator power amplifier (MOPA),the continuous and single mode laser of 1.08 μm wavelength,1.05 kW maximum output power is obtained.The laser spectrum and beam quality as functions of laser power are studied.The results indicate that the center wavelength and beam quality remain unchanged,and the spectrum width broadens with the increase of laser power.The reason for the broadening of laser spectrum width is that as laser power becomes higher,the change of refractive index of fiber grating core increases,which induces the spectrum broadening of master oscillator stage.Also,the noise induced by the spectrum broadening of master oscillator stage is amplified in amplifier stage,which combined with spontaneous radiation induced by amplifier makes the spectrum width of amplifier stage broaden.Moreover,the reason that the beam quality worsens is that part of the laser transmitting in the fiber core leaks to inner cladding due to fiber bending.关键词
光纤激光器/单模/光谱/光束质量Key words
fiber laser/single mode/spectrum/beam quality分类
信息技术与安全科学引用本文复制引用
张利明,周寿桓,赵鸿,张昆,张大勇,朱辰,梁琳,李尧,王雄飞..kW级主振荡功率放大光纤激光器输出特性[J].强激光与粒子束,2013,25(8):1893-1896,4.
