研究目的
Investigating the generation of ultrasound in polyetheretherketone (PEEK) using a mid-infrared ZnGeP2 optical parametric oscillator (ZGP-OPO) pumped by a Q-switched Ho:YAG laser.
研究成果
Laser ultrasonic generation in PEEK has been successfully demonstrated using a mid-infrared ZGP-OPO. The maximum ultrasonic signal amplitude was achieved at a wavelength of 3.4 μm, with the signal strength influenced by the laser's wavelength and the sample's absorption characteristics.
研究不足
The study is limited by the coupling of the sample and piezoelectric transducer, which leads to energy loss. The ultrasonic signal strength is also influenced by the wavelength-dependent absorption of PEEK.
1：Experimental Design and Method Selection:
The study employs a ZGP-OPO pumped by a Q-switched Ho:YAG laser to generate ultrasound in PEEK. The ZGP-OPO's output characteristics and the ultrasonic signal generation in PEEK are investigated.
2：Sample Selection and Data Sources:
PEEK samples are used for ultrasonic generation and detection.
3：List of Experimental Equipment and Materials:
Includes Ho:YAG laser, ZGP-OPO, PEEK samples, ultrasonic transducer, and oscilloscope.
4：Experimental Procedures and Operational Workflow:
The laser is operated in Q-switched mode, and the ultrasonic signal is detected by a piezoelectric transducer and recorded by an oscilloscope.
5：Data Analysis Methods:
The ultrasonic signal amplitude is analyzed at different frequencies and wavelengths.
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