Mid-IR Laser Generating Ultrasound in a Polyetheretherketone Polymer  

作　　者：Ye Zhang Gao-You Liu Yi Chen Chuan-Peng Qian Ben-Rui Zhao Bao-Quan Yao Tong-Yu Dai Xiao-Ming Duan 张晔;刘高佑;陈毅;钱传鹏;赵本瑞;姚宝权;戴通宇;段小明(National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology)

机构地区：[1]National Key Laboratory of Tunable Laser Technology,Harbin Institute of Technology,Harbin 150001

出　　处：《Chinese Physics Letters》2019年第11期18-21,共4页中国物理快报（英文版）

摘　　要：We demonstrate laser ultrasonic generation in polyetheretherketone(PEEK). A middle infrared ZnGeP2 optical parametric oscillator(ZGP-OPO) pumped by a Q-switched Ho:YAG laser is employed as the ultrasonic excitation source. The ZGP-OPO has a spectral range of 3.2–3.4 μm. At an output wavelength of 3.4 μm, the maximum average output power of ZGP-OPO is 3.05 W with a pulse width of 24.3 ns, corresponding to a peak power of approximately 127.5 kW. The ultrasound is generated by the laser converted from 3.2 to 3.4 μm in the PEEK composite. The maximum ultrasonic signal amplitude in PEEK is 33 mV under the condition of thermoelastic excitation at 3.4 μm. Ablation occurs in the CPRF sample when the energy fluence is over 122.45 m J/cm^2. PEEK has a stronger absorption at 3.4 μm and laser-ultrasound generation is influenced by the wavelength of the laser.We demonstrate laser ultrasonic generation in polyetheretherketone(PEEK). A middle infrared ZnGeP2 optical parametric oscillator(ZGP-OPO) pumped by a Q-switched Ho:YAG laser is employed as the ultrasonic excitation source. The ZGP-OPO has a spectral range of 3.2–3.4 μm. At an output wavelength of 3.4 μm, the maximum average output power of ZGP-OPO is 3.05 W with a pulse width of 24.3 ns, corresponding to a peak power of approximately 127.5 kW. The ultrasound is generated by the laser converted from 3.2 to 3.4 μm in the PEEK composite. The maximum ultrasonic signal amplitude in PEEK is 33 mV under the condition of thermoelastic excitation at 3.4 μm. Ablation occurs in the CPRF sample when the energy fluence is over 122.45 m J/cm^2. PEEK has a stronger absorption at 3.4 μm and laser-ultrasound generation is influenced by the wavelength of the laser.

关 键 词：OPO laser PUMPED 

分 类 号：TN2[电子电信—物理电子学]