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| 布里渊振荡频率的应力调制效应研究 |
| Study on the stress modulation effect on Brillouin oscillation frequency |
| 投稿时间：2024-03-28 修订日期：2024-06-09 |
| DOI： |
| 中文关键词: 应力 泵浦-探测技术 皮秒超声技术 布里渊振荡 频率 |
| 英文关键词:stress pump-probe technique picosecond ultrasonics technique Brillouin oscillation frequency |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 随着材料科学和光电子技术的快速发展，精确测量材料的界面应力成为研究热点。时域布里渊散射作为一种基于超快激光和皮秒超声的非接触式全光学实验技术，可用于产生和检测位于透明介质中由于声光作用产生的布里渊振荡，其在应力分析方面展现出了巨大潜力。本研究旨在深入探讨单轴应力对高硼硅玻璃中布里渊振荡频率的调制效应。通过建立布里渊振荡测量系统，完成了在两种不同单轴应力下布里渊振荡的测量，研究结果表明，随着压应力的增大，布里渊振荡频率呈现减小的趋势。基于布里渊振荡频率的理论表达式和对实验信号的精确测量，发展了应力和布里渊振荡频率之间的理论关系，得到了应力-布里渊振荡频率调制系数。此研究为理解布里渊振荡频率与应力的关系提供了新的视角，未来，这项研究成果有望在精确测量材料界面应力方面提供重要的理论和实践参考。 |
| 英文摘要: |
| With the rapid advancement of materials science and optoelectronic technology, precise measurement of interfacial stress in materials has become a research focus. Time-domain Brillouin scattering, a non-contact full-optical experimental technique based on ultrafast lasers and picosecond acoustics, is capable of generating and detecting Brillouin oscillations within transparent media due to acousto-optic interactions, demonstrating significant potential in stress analysis. This study aims to delve into the modulation effects of uniaxial stress on Brillouin oscillation frequencies within high borosilicate glass. By establishing a Brillouin oscillation measurement system, measurements of Brillouin oscillations under two distinct uniaxial stresses were completed, and the results revealed a trend of decreasing Brillouin oscillation frequency with increasing compressive stress. Building on the theoretical expressions of Brillouin oscillation frequencies and precise measurements of experimental signals, a theoretical relationship between stress and Brillouin oscillation frequency was developed, yielding a stress-Brillouin oscillation frequency modulation coefficient. This research provides new insights into the relationship between Brillouin oscillation frequency and stress, and the findings are expected to offer significant theoretical and practical references for precise interfacial stress measurements in materials in the future. |
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