飞秒激光脉冲倍频特性的数值模拟

J4 ›› 2013, Vol. 30 ›› Issue (4): 466-472.

飞秒激光脉冲倍频特性的数值模拟

姜宝华, 黄章超, 吕福云

1青岛黄海学院电子与信息工程学院，山东青岛 266427； 2南开大学物理科学学院，天津 300071

出版日期:2013-07-28 发布日期:2013-07-06
通讯作者: 姜宝华（1979-），女，山东青岛人，讲师，从事非线性频率变换方面的研究。 E-mail:jbh789@163.com
基金资助:
国家自然科学基金基于PPMgLN微结构波导倍频的超短脉冲全光纤激光光源（60677013）

Numerical simulation of frequency doubling of femtosecond pulses

Jiang Baohua, Huang Zhangchao, Lv Fuyun

1 Qingdao Huanghai College，Qingdao 266427, China; 2 College of Physical Science, Nankai University, Tianjin 300071, China

Published:2013-07-28 Online:2013-07-06

摘要/Abstract

摘要： 模拟了随着传播长度的增加，基频和倍频激光脉冲的时域波形和光谱特性的演变过程。通过引入走离长度和非线性长度，给出了走离效应、群速度色散和三阶非线性效应对飞秒脉冲倍频的影响。研究了飞秒脉冲倍频的波长调谐特性，发现40ps基频脉冲波长调谐带宽仅有2.8nm，而40fs基频脉冲的倍频波长调谐带宽高达42nm。这在周期极化倍频晶体工艺中有重要应用价值。

关键词: 非线性光学, 飞秒脉冲, 波长调谐, 波形和光谱演变

Abstract: The temporal and spectral evolutions of the fundamental and second harmonic (SH) pulses were simulated in the propagation. By introducing the walk-off length and the nonlinear length, walk-off effect, group-velocity dispersion and cubic nonlinearity were described. The wavelength tuning characteristic of femtosecond-pulse second harmonic generation (SHG) was analyzed. It is found that the Full width at half maximum (FWHM) of the SHG wavelength tuning curve of 40fs pump pulses can reach as wide as 42nm, while that of 40ps pump pulses is only 2.8nm.

Key words: nonlinear optics, femtosecond pulses, wavelength tuning, temporal and spectral evolutions

中图分类号:

O437

姜宝华, 黄章超, 吕福云. 飞秒激光脉冲倍频特性的数值模拟[J]. J4, 2013, 30(4): 466-472.

Jiang Baohua, Huang Zhangchao, Lv Fuyun. Numerical simulation of frequency doubling of femtosecond pulses[J]. J4, 2013, 30(4): 466-472.

参考文献

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