光子学报, 2009, 38 (11): 2738, 网络出版: 2010-05-10
大芯径光纤整形飞秒激光脉冲空间分布的研究
Spatial Shaping of Femtosecond Laser Pulse in Large-core Optical Fiber
摘要
通过将1 kHz重复频率的飞秒放大激光脉冲耦合到大芯径(100 μm)阶跃光纤, 在27 mm长的光纤中产生了环形空间光强分布, 并在3 160 mm的长光纤中观察到平台型的空间光强分布, 通过自聚焦效应对该现象进行了解释.结果表明,通过选择合适的光纤, 可以实现对放大飞秒激光脉冲的有效空间整形, 从而达到改善光束质量的效果.
Abstract
The experimental research on spatial shaping by injecting the amplified femtosecond laser pulse at the repetition rate of 1 kHz into a step fiber with core diameter of 100 μm is reported.Beam profiles with ring and tap-top distributions are observed in the fibers with length in 27 mm and 3 160 mm,respectively,which are explained by the self-focusing effect.A method is introduced to shape the beam profile of femtosecond amplified laser pulse by choice suitable fiber,therefore it can be used to improve the beam quality.王向林|wangxianglin.06@stu.xjtu.edu.cn
王向林, 侯洵, 魏志义. 大芯径光纤整形飞秒激光脉冲空间分布的研究[J]. 光子学报, 2009, 38(11): 2738. WANG Xiang-lin, HOU Xun, WEI Zhi-yi. Spatial Shaping of Femtosecond Laser Pulse in Large-core Optical Fiber[J]. ACTA PHOTONICA SINICA, 2009, 38(11): 2738.