Abstract
In this paper, we demonstrate 1-kHz-repetition-rate laser ultrasound in carbon-fiber-reinforced plastics (CFRPs). A ZGP master oscillator and power amplifier (MOPA) system was used to generate high-repetition-rate laser radiation in the spectral range 3.2–3.4 μm. At the output wavelength of 3.4 μm, the maximum output energy of the ZGP MOPA system is 5.62 mJ with a pulse width of 24 ns, corresponding to a peak power of approximately 233.9 kW. The ultrasound was generated by the laser converted from 3.2 to 3.4 μm in the graphite/epoxy composite. The maximum ultrasonic signal amplitude in the CFRP sample was 36.2 mV in the condition of thermoelastic excitation at 3.4 μm. Ablation occurred in the CFRP sample when the energy fluence was over . Compared in different samples, laser-ultrasound generation was influenced by the wavelength of the laser.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Chuanpeng Qian, Baoquan Yao, Youlun Ju, Xiaoming Duan, Benrui Zhao, Tongyu Dai, and Yuezhu Wang
Appl. Opt. 58(4) 879-882 (2019)
Alex Dergachev, Darrell Armstrong, Arlee Smith, Thomas Drake, and Marc Dubois
Opt. Express 15(22) 14404-14413 (2007)
Chuanpeng Qian, Xiaoming Duan, Baoquan Yao, Yingjie Shen, Ye Zhang, Benrui Zhao, Jinhe Yuan, Tongyu Dai, Youlun Ju, and Yuezhu Wang
Opt. Express 26(23) 30195-30201 (2018)