Material Measurement Method Based on Femtosecond Laser Plasma Shock Wave

• 作者: Dong ZHONG Zhongming LI
• 来源期刊: 光子传感器:英文版
• 关键词: Optical fiber sensing femtosecond laser plasma shock wave acoustic signal material testing
• 年，卷（期）: 2017,（1）
• 页码范围: 1-10
• 页数: 10页
• 分类号: YTP
• 语种: 中文

摘要

The acoustic emission signal of laser plasma shock wave, which comes into being when femtosecond laser ablates pure Cu, Fe, and A1 target material, has been detected by using the fiber Fabry-Perot (F-P) acoustic emission sensing probe. The spectrum characters of the acoustic emission signals for three kinds of materials have been analyzed and studied by using Fourier transform. The results show that the frequencies of the acoustic emission signals detected from the three kinds of materials are different. Meanwhile, the frequencies are almost identical for the same materials under different ablation energies and detection ranges. Certainly, the amplitudes of the spectral character of the three materials show a fixed pattern. The experimental results and methods suggest a potential application of the plasma shock wave on-line measurement based on the femtosecond laser ablating target by using the fiber F-P acoustic emission sensor probe.