Femtosecond off-axis digital holography for monitoring dynamic surface deformation

被引：16
|
作者：
Zhu, Linwei [1 ,2 ]
Zhou, Changhe [1 ,2 ]
Wu, Tengfei [1 ,2 ]
Jia, Wei [1 ,2 ]
Fan, Zhongwei [3 ,4 ]
Ma, Yunfeng [4 ,5 ]
Niu, Gang [3 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Informat Opt Lab, Shanghai 201800, Peoples R China
[3] Beijing GK Laser Technol Co Ltd, Beijing 100085, Peoples R China
[4] Acad Optoelect, Beijing 100080, Peoples R China
[5] Chinese Acad Sci, Grad Univ, Beijing 100081, Peoples R China
来源：
APPLIED OPTICS | 2010年 / 49卷 / 13期
基金：
中国国家自然科学基金;
关键词：
METAL-FILM; LASER; ABLATION; PHASE; GLASS;
D O I：
10.1364/AO.49.002510
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a femtosecond off-axis digital holography for investigating the dynamic reversible surface change of a metal film induced by femtosecond laser pulses with fluences near the ablation threshold. A reflection Michelson interferometer (RMI) and a transmission Mach-Zehnder interferometer (TMZI) are integrated in the same setup for recording digital holograms. The RMI is used to measure the laser-induced surface deformation of the metal film, while the TMZI is used to analyze the refraction index change of the metal film induced by the femtosecond laser pulses. Experimental results show that both surface modification and refraction index change of chromium metal film can be observed when femtosecond laser pulses are below and above the ablation threshold. Based on the experimental results, the physical processes of the metal induced by femtosecond laser pulses are given qualitatively. (C) 2010 Optical Society of America
引用
收藏
页码：2510 / 2518
页数：9
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