Investigation of long pulse laser induced flame on Al in air using optical interferometry

Hongchao Zhang; Jian Lu; Zhonghua Shen; Xiaowu Ni

doi:10.1117/12.2011316

16 May 2013 Investigation of long pulse laser induced flame on Al in air using optical interferometry

Hongchao Zhang, Jian Lu, Zhonghua Shen, Xiaowu Ni

Proceedings Volume 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012); 87960U (2013) https://doi.org/10.1117/12.2011316
Event: 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 2012, Xi'an, Shaanxi, China

Abstract

The process of long pulse laser(1ms) interaction with the aluminum plate was analyzed using Mach-Zehnder interferometer in this paper. A continuous semiconductor laser with about 50mW power and 532nm wavelength was used to detect the flame which induced by long pulse laser interaction with the aluminum plate. A high speed camera was used to capture the interferograms. The exposure time of the high speed camera is about 2 microseconds. And the frame rate is 2130fps. The high-speed camera and the long pulse laser pulse was synchronously controlled by the four-channel digital delay (Stanford Research Systems DG535).The FFT(Fast Fourier transform ) analysis is applied to extract the phase of the interferograms. The results provide an understanding of the process of long pulse laser drilling of the Al target.

Citation Download Citation

Hongchao Zhang, Jian Lu, Zhonghua Shen, and Xiaowu Ni "Investigation of long pulse laser induced flame on Al in air using optical interferometry", Proc. SPIE 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 87960U (16 May 2013); https://doi.org/10.1117/12.2011316

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