摘要
针对传统力学测试方法中存在样品损伤和空间分辨率不足的问题,提出一种基于脉冲受激布里渊散射(impulsive stimulated Brillouin scattering,ISBS)的无损光学检测方法。通过对布里渊瞬态光栅形成机理进行理论分析,建立声波波长与光学参数间的关系模型,搭建基于532 nm泵浦光与780 nm探测光的ISBS实验系统。实验系统中通过优化透射光栅常数与4f系统透镜焦距比,实现了对声波波长与布里渊频移的精确控制。引入聚焦透镜压缩光斑尺寸,显著提升系统空间分辨率和信号强度。研究结果表明,所构建的ISBS系统具备对声波场进行可视化分析与参数精确调控的能力,为生物力学表征提供了可靠方法基础。
To address the issues of sample damage and insufficient spatial resolution in conventional mechanical test-ing methods,a non-destructive optical detection technique based on impulsive stimulated Brillouin scattering(ISBS)is proposed.The formation mechanism of the transient Brillouin grating is theoretically analyzed,and a relationship model between the acoustic wavelength and optical parameters is established.An ISBS experimental system is con-structed using a 532 nm pulsed pump beam and a 780 nm continuous probe beam.By optimizing the groove density of the transmission grating and the focal length ratio of the 4f optical system,precise control of the acoustic wavelength and Brillouin frequency shift is achieved.Introducing a focusing lens to compress the spot size significantly improves the system's spatial resolution and signal strength.The research results indicate that the constructed ISBS system has the ability to visualize and precisely control the acoustic field parameters,providing a reliable method foundation for biomechanical characterization.
作者
刘硕
马海霞
董宇航
邢元
石斌
董凯捷
LIU Shuo;MA Haixia;DONG Yuhang;XING Yuan;SHI Bin;DONG Kaijie(School of Electronics and Information Engineering,Hebei University of Technology,Tianjin 300401,China;School of Me-chanical Engineering,Tianjin University,Tianjin,300350,China;Department of Orthopaedics,Chinese People's Liberation Ar-my General Hospital,Beijing 100853,China;School of Mechanical Engineering,University of Science and Technology Bei-jing,Beijing 100083,China)
出处
《河北工业大学学报》
2025年第6期69-78,共10页
Journal of Hebei University of Technology
基金
国家自然科学基金资助项目(62475067)
京津冀基础研究合作专项资助项目(F2024202116)
河北省高等学校科学技术研究资助项目(CXY2024032)
石家庄市科技合作专项项目(SJZZXC25002)。
关键词
脉冲受激布里渊散射
布里渊瞬态光栅
声波
布里渊频移
生物力学
impulsive stimulated Brillouin scattering
Brillouin transient grating
acoustic wave
Brillouin frequency shift
biomechanics
