Author Affiliations
Abstract
Department of Control Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Photoacoustic tomography is a noninvasive and nonionized biomedical imaging modality but it cannot reveal the inner structure and sideward boundary information of blood vessels in the linear array detection mode. In contrast, Monte Carlo (MC) light transport could provide the optical fluence distribution around the entire vascular area. This research explores the combination of linear array transducer-based photoacoustic tomography and MC light transport in the blood vessel quantification. Simulation, phantom, and in vivo experiments are in good correlation with the ultrasound imaging, validating this approach can clearly visualize the internal region of blood vessels from background tissue.
170.5120 Photoacoustic imaging 100.3020 Image reconstruction-restoration 110.5120 Photoacoutic imaging Chinese Optics Letters
2017, 15(11): 111701
天津大学电子信息工程学院光纤通信实验室 光电信息技术科学教育部重点实验室, 天津 300072
利用布拉格光栅阵列，实现了在波长和时间上的素数跳频码的编解码。利用该编解码器，完成了在两个发送用户和一个接收用户的条件下，传输速率从20 Mb/s到1.4 Gb/s的光码分多址通信系统。研究了当系统传输速率超过相邻布拉格光栅间距限制条件时，系统的性能变化情况。结果表明当用户数不超过（3/2）Ps（素数跳频码的扩展因子）时，速率超限对系统性能基本无影响。在同样误码率要求条件下，地址码较长的系统，传输速率可以达到限制速率的2～3倍而不会造成明显的系统性能下降。这表明相邻布拉格光栅间距条件所限制的系统速率并非不可逾越的。
光纤通信技术 光码分多址 二维编解码 布拉格光栅阵列
