The influence of laser source on generated surface acoustic waves

YAN Gang; XU Xiao-dong; LU Jian; SHEN Zhong-hua; NI Xiao-wu

LASER TECHNOLOGY > 2006 > 30(3): 317-319.

YAN Gang, XU Xiao-dong, LU Jian, SHEN Zhong-hua, NI Xiao-wu. The influence of laser source on generated surface acoustic waves[J]. LASER TECHNOLOGY, 2006, 30(3): 317-319.

Citation:

YAN Gang, XU Xiao-dong, LU Jian, SHEN Zhong-hua, NI Xiao-wu. The influence of laser source on generated surface acoustic waves[J]. LASER TECHNOLOGY, 2006, 30(3): 317-319.

Citation:

YAN Gang, XU Xiao-dong, LU Jian, SHEN Zhong-hua, NI Xiao-wu. The influence of laser source on generated surface acoustic waves[J]. LASER TECHNOLOGY, 2006, 30(3): 317-319.

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The influence of laser source on generated surface acoustic waves

1.
Department of Applied Physics, Nanjing Univesity of Science & Technology, Nanjing 210094, China;
2.
Institute of Acoustics, Nanjing University, Nanjing 210093, China

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Received Date: April 04, 2005
Revised Date: May 23, 2005
Published Date: May 24, 2006

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Abstract

Abstract

A laser generation and optical difference detection method of surface acoustic waves(SAW) is used to study the influence of laser source on SAW.SAW are excited employing a Nd∶YAG laser on sample aluminum plate and detected with an optical difference detection system based on optical beam deflection technique with a 632nm He-Ne laser.The experimental investigation of the influence of the type of laser source and line source energy on laser generated SAW is carried out.Furthermore,the generation of SAW is discussed from the principles of thermoelasticity and ablation.In these two principles,the amplitude of SAW takes a great change.With the increase of the incident power density,the amplitude of SAW changes from linear to nonlinear.These results provide powerful guidance for the theory research of laser generated SAW.
- laser technique,
- surface acoustic waves,
- optical difference,
- nondestructive testing

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References

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