INSTRUMENTATION FOR COHERENT DETECTION IN TURBID MEDIA

浑浊介质中的相干检测仪器

• 批准号: 6281753
• 负责人: CHANGHUEI YANG
• 金额: $ 3.41万
• 依托单位: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 1999-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6281753
• 关键词: bioengineering /biomedical engineering; biomedical resource; human tissue; lasers; technology /technique

We have conducted experiments using a newly developed setup for studying preservation of coherence in scattering media. This setup uses 150 femtosecond excitation pulses from Argon ion pumped mode locked Ti:sapphire laser system. Light is delivered through a scattering sample composed of polystyrene microspheres and mixed with a slightly tilted (0-20 mrad) reference beam. We were able to find relative contribution in coherent signal from photons that were scattered 1, 2, 3 etc times. This work can be of importance in developing system for imaging sub-surface structures in mucosal tissues.

我们使用新开发的装置进行了实验， 研究散射介质中相干性的保持。 这种设置 使用来自氩离子泵浦模式的150飞秒激发脉冲 锁定钛宝石激光系统。 光通过一个 由聚苯乙烯微球组成的散射样品， 略微倾斜（0-20 mrad）的参考光束。 我们能够找到 来自光子的相干信号的相对贡献， 分散1、2、3等次。 这项工作可能是重要的， 用于对粘膜中的亚表面结构成像的显影系统 组织中