-
摘要: 设计并建立了一种可用于测量介观尺度(几十微米至几毫米)材料声速的激光超声系统。该系统采用脉宽为6.3 ns的调Q激光器作为超声波激发光源,使用光纤位移干涉仪进行超声位移探测。利用新建立的激光超声系统,测量了不同厚度铜箔的纵波声速。结果表明,激光超声系统得到的声速具有较高精度,可以将其应用于介观尺度材料声速测量。Abstract: A laser-based ultrasound system was designed and built to measure the sound velocity of mesoscale (tens of micrometer- to millimeter-sized) objects. The system uses a Q-switch laser with 6.3 ns pulse width for excitation of broadband ultrasonic waves, and an optical fiber displacement interferometer for detection. The longitudinal acoustic wave velocities of the copper foils with different thicknesses were presented, which exhibit a relatively high degree of accuracy.
-
Key words:
- laser ultrasonics /
- sound velocity /
- interferometer /
- copper
-
Scruby C B, Drain L E. Laser Ultrasonics: Techniques and Applications [M]. New York: Adam Hilger, 1990. Chinn D, Huber R, Chambers D, et al. Acoustic Characterization of Mesoscale Objects, UCRL-TR-229835 [R]. California: Lawrence Livermore National Laboratory, 2007. Chigarev N, Zinin P, Ming L C, et al. Laser Generation and Detection of Longitudinal and Shear Acoustic Waves in a Diamond Anvil Cell [J]. Appl Phys Lett, 2008, 93(18): 181905. Pezeril T, Ruello P, Gougeon S, et al. Generation and Detection of Plane Coherent Shear Picosecond Acoustic Pulses by Lasers: Experiment and Theory [J]. Phys Rev B, 2007, 75(17): 174307. Emery P, Devos A, Ancey P. Picosecond Ultrasonics: A Technique Destined for BAW Technology [A]//1st International Symposium on Laser Ultrasonics: Science, Technology and Applications [C]. Montreal, Canada, 2008. Rossignol C, Rampnoux J M, Perton M, et al. Generation and Detection of Shear Acoustic Waves in Metal Submicrometric Films with Ultrashort Laser Pulses [J]. Phys Rev Lett, 2005, 94(16): 166106. Decremps F, Belliard L, Couzinet B, et al. Liquid Mercury Sound Velocity Measurements under High Pressure and High Temperature by Picosecond Acoustics in a Diamond Anvils Cell [J]. Rev Sci Instrum, 2009, 80(7): 073902. Armstrong M R, Crowhurst J C, Reed E J, et al. Ultrafast High Strain Rate Acoustic Wave Measurements at High Static Pressure in a Diamond Anvil Cell [J]. Appl Phys Lett, 2008, 92(10): 101930. Huber R, Chinn D, Balogun O, et al. High Frequency Laser-Based Ultrasound, UCRL-PROC-215718 [R]. California: Lawrence Livermore National Laboratory, 2005. Decremps F, Belliard L, Perrin B, et al. Sound Velocity and Absorption Measurements under High Pressure Using Picosecond Ultrasonics in a Diamond Anvil Cell: Application to the Stability Study of AlPdMn [J]. Phys Rev Lett, 2008, 100: 035502. Yang G G. Modern Optical Testing Technology [M]. Hangzhou: Zhejiang University Press, 1997. (in Chinese) 杨国光. 近代光学测试技术 [M]. 杭州: 浙江大学出版社, 1997. Marsh S P. LASL Shock Hugoniot Data [M]. California: University of California Press, 1980.
点击查看大图
计量
- 文章访问数: 7698
- HTML全文浏览量: 459
- PDF下载量: 649