High-repetition-rate laser ultrasonic generation in carbon-fiber-reinforced plastics excited by a 3.2-3.4 mu m ZGP master oscillator power amplifier system

Zhang Ye; Liu Gaoyou; Chen Yi; Qian Chuanpeng; Zhao Benrui; Yao Baoquan; Dai Tongyu; Duan Xiaoming

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High-repetition-rate laser ultrasonic generation in carbon-fiber-reinforced plastics excited by a 3.2-3.4 mu m ZGP master oscillator power amplifier system

机译：碳纤维增强塑料中的高重复速率激光超声发电由3.2-3.4 mu M ZGP主振荡器功率放大器系统激发

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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 mu m. At the output wavelength of 3.4 mu m, 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 mu m 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 mu m. Ablation occurred in the CFRP sample when the energy fluence was over 90 mJ/cm(2). Compared in different samples, laser-ultrasound generation was influenced by the wavelength of the laser. (C) 2019 Optical Society of America

机译：在本文中，我们在碳纤维增强塑料（CFRPs）中显示了1-KHz重复速率激光超声。 ZGP主振荡器和功率放大器（MOPA）系统用于在光谱范围内产生高重复速率激光辐射3.2-3.4μm。在输出波长为3.4μm，ZGP MOPA系统的最大输出能量为5.62 MJ，脉冲宽度为24 ns，对应于约233.9 kW的峰值功率。通过在石墨/环氧复合材料中由3.2至3.4μm转换的激光产生超声波。 CFRP样品中的最大超声信号幅度为36.2mV，在3.4μm的热弹性励磁条件下。当能量流量超过90 mJ / cm（2）时，CFRP样品中发生消融。在不同的样品中比较，激光超声产生受激光波长的影响。（c）2019年光学学会

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《Applied optics》 |2019年第27期|共6页
作者
Zhang Ye; Liu Gaoyou; Chen Yi; Qian Chuanpeng; Zhao Benrui; Yao Baoquan; Dai Tongyu; Duan Xiaoming;
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Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Natl Key Lab Tunable Laser Technol Harbin 150001 Heilongjiang Peoples R China;

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High-repetition-rate laser ultrasonic generation in carbon-fiber-reinforced plastics excited by a 3.2-3.4 mu m ZGP master oscillator power amplifier system

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