| 飞秒激光Z扫描技术研究CS_2的非线性特性 |
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| 引用本文： | 李虹雨,常青.飞秒激光Z扫描技术研究CS_2的非线性特性[J].强激光与粒子束,2010,22(10). |
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| 作者姓名： | 李虹雨 常青 |
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| 作者单位： | 黑龙江大学 电子工程学院， 哈尔滨 150080 |
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| 基金项目： | 黑龙江省教育厅项目，黑龙江省普通高等学校青年学术骨干支持计划项目 |
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| 摘 要： | 利用波长为800 nm的飞秒激光脉冲,通过Z扫描技术研究了CS2在不同光强下的非线性折射和非线性吸收特性发现,随着光强的增加,闭孔Z扫描透过率曲线发生了较大的轴向移位。分析结果表明:在低光强下,这种轴向移位源于双光子吸收的影响;而在高光强下,是双光子吸收和五阶非线性共同作用的结果。给出了决定五阶非线性存在与否的临界光强,以及非线性参量与轴向位移的关系。
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| 关 键 词： | Z扫描 CS2 轴向移位 非线性折射 非线性吸收 |
| 收稿时间： | 1900-01-01; |
Investigation of nonlinear characteristics of CS2 with femto-second pulsed Z-scan technique |
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| Li Hongyu,Chang Qing.Investigation of nonlinear characteristics of CS2 with femto-second pulsed Z-scan technique[J].High Power Laser and Particle Beams,2010,22(10). |
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| Authors: | Li Hongyu Chang Qing |
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| Affiliation: | College of Electronic Engineering, Heilongjiang University, Harbin 150080, China |
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| Abstract: | Nonlinear refraction and absorption properties in carbon disulfide(CS2) have been investigated by Z-scan technique under femtosecond pulse lasers at 800 nm in a broad intensity range. It is found that the Z-scan transmittance curve has a large displacement on the axis with the increase of intensity. At low intensity, it is mainly due to two-photon absorption effect, while the fifth-order processes and two-photon absorption are at present simultaneously at high intensity. The critical intensity which determines the existence of the fifth-order nonlinear process is presented, along with the relationship between the axial displacement and some parameters of the transmittance curves. |
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| Keywords: | carbon disulfide axial displacement nonlinear refraction nonlinear absorption |
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