| 大芯径光纤整形飞秒激光脉冲空间分布的研究 |
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| 引用本文： | 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). |
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| 作者姓名： | 王向林 侯洵 魏志义 |
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| 作者单位： | 1. 西安交通大学电子与信息工程学院,西安,710049;西安交通大学陕西省信息光子技术重点实验室,西安,710049
2. 中国科学院物理研究所光物理重点实验室,北京,100190 |
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| 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(100μm)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.
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| 关 键 词： | 飞秒激光 大芯径光纤 光束空间整形 自聚焦 |
Spatial Shaping of Femtosecond Laser Pulse in Large-core Optical Fiber |
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| 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). |
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| Authors: | WANG Xiang-lin HOU Xun WEI Zhi-yi |
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| 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 100μm 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. |
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| Keywords: | Femtosecond laser Large-core optical fiber Spatial shaping Self-focusing |
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