| 色散对被动锁模飞秒固体激光器输出脉冲的影响 |
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| 引用本文： | 曹轶乐,杨伯君,于 丽,张晓光.色散对被动锁模飞秒固体激光器输出脉冲的影响[J].激光与红外,2005,35(6):400-403. |
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| 作者姓名： | 曹轶乐 杨伯君 于 丽 张晓光 |
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| 作者单位： | 北京邮电大学理学院,北京,100876 |
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| 基金项目： | 国家自然科学基金(60378011)。 |
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| 摘 要： | 文中采用饱和吸收体的快饱和模型,使用分步傅利叶方法对描述固体激光器的Haus
主方程进行了数值求解,讨论了色散和自相位调制对脉冲形成的影响。当激光器达到稳定状态时,输出脉冲近似为变换极限的双曲正割脉冲,时间带宽积在0. 315附近。计算结果表明,随着群时延色散绝对值的降低,输出脉宽近线性减小,此数值结论与已有实验结果定性一致。
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| 关 键 词： | 飞秒脉冲固体激光器 群时延色散 分步傅利叶方法 自相 |
| 文章编号： | 1001-5078(2005)06-0400-04 |
The Influence of Dispersion on Output Pulse of Passively Mode-locking Femtosecond Solid State Lasers |
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| GAO Yi-le,YANG Bo-jun,YU Li,ZHANG Xiao-guang.The Influence of Dispersion on Output Pulse of Passively Mode-locking Femtosecond Solid State Lasers[J].Laser & Infrared,2005,35(6):400-403. |
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| Authors: | GAO Yi-le YANG Bo-jun YU Li ZHANG Xiao-guang |
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| Abstract: | The Haus master equation which described the femtosecond pulse solid laser dynamics is studied numerically adopting the fast saturable absorber model, and the effects of dispersion and self phase modulation on pulse shaping are discussed. The profile of pulse is transform limited hyperbolic secant closely, while the laser is on steady state, and the time-bandwidth product is about 0315. The conclusion shows that the pulse width decreases nearly linearly while the absolute value of group delay dispersion decreases, and it is consistent with the result of experiments qualitatively. |
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| Keywords: | femtosecond pulse solid state lasers group delay dispersion split-step-Fourier method self phase modulation pulse width |
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