SAGNAC INTERFEROMETER-BASED DIGITAL OPTICAL PHASE CONJUGATION

基于 SAGNAC 干涉仪的数字光学相位共轭

• 批准号: 8364159
• 负责人: TMOTHY HILLMAN
• 金额: $ 2.97万
• 依托单位: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-01 至 2012-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8364159
• 关键词: Biomedical Research; Complex; Funding; Grant; Interferometry; Lasers; Light; National Center for Research Resources; Optics; Phase; Principal Investigator; Research; Research Infrastructure; Resources; Sampling; Source; System; United States National Institutes of Health; base; cost; digital; flexibility; reconstruction; response; transmission process

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. A "ring" Sagnac interferometry system is utilized to perform digital optical phase conjugation. The system permits the wavefield scattered from a turbid medium to be recorded holographically. Then, a complex-conjugate reconstruction of the wave can be generated by a spatial light modulator and propagated through the sample in the reverse direction. This achieves the effect of reversing the effects of sample scattering. The same system is capable of recording a representation of the transmission matrix of the sample, its linear response to an arbitrary wavefield input. This information, and the flexibility endowed by the degree of control permitted by the SLM, can be used to enhance either the accuracy or the total intensity of the phase-conjugate reconstruction.

该子项目是利用资源的众多研究子项目之一 由 NIH/NCRR 资助的中心拨款提供。子项目的主要支持 并且子项目的主要研究者可能是由其他来源提供的， 包括其他 NIH 来源。 子项目可能列出的总成本 代表子项目使用的中心基础设施的估计数量， NCRR 赠款不直接向子项目或子项目工作人员提供资金。 利用“环”Sagnac 干涉测量系统来执行数字光学相位共轭。 该系统允许全息记录从浑浊介质散射的波场。然后，空间光调制器可以生成波的复共轭重构，并沿相反方向传播通过样本。 这样就达到了逆转样品散射影响的效果。 同一系统能够记录样本传输矩阵的表示及其对任意波场输入的线性响应。 该信息以及 SLM 允许的控制程度赋予的灵活性可用于增强相位共轭重建的准确性或总强度。