Polarization-sensitive OCT system using single-mode fiber
Polarization-sensitive OCT system using single-mode fiber
复制标题
使用单模光纤的偏振敏感 OCT 系统
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Podoleanu
中科院分区：
文献类型：
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作者：
R. Cucu;J. Pedro;R. Rosen;A. Podoleanu
偏振敏感光学相干断层扫描（PS-OCT）考虑了光波的矢量性质（偏振态）。深度分辨Mueller矩阵元给出了生物目标偏振特性的最完整信息。然而，构建易于用于体内成像的Mueller矩阵PS-OCT是一项困难的任务。我们设计并组装了一个更简单，更通用的系统，只提供必要的深度分辨的组织偏振特性（线性双折射延迟）的信息。干涉仪是体光学和单模（SM）光纤组件的混合配置。不使用保偏（PM）光纤。参考光束和样品光束在两个单模光纤耦合器中干涉。该系统可以显示对应于线性正交偏振分量的一对OCT图像，或者由偏振不敏感（纯反射率）图像和线性双折射延迟图组成的一对图像。所有图像均为8位灰度级，并通过快速正面扫描（T扫描）以2帧/秒获得。我们展示了在体内的视神经区域和周边角膜的正面图像。
Polarization sensitive optical coherence tomography (PS-OCT) takes into account the vector nature of light waves (state of polarization). The most complete information about the polarization properties of a biological target is given by depth resolved Mueller matrix elements. However, the construction of a Mueller matrix PS-OCT easy to use for in-vivo imaging is a difficult task. We designed and assembled a simpler and more versatile system that provides only essential depth-resolved information about the tissue polarization properties (linear birefringence retardation). The interferometer is a hybrid configuration of bulk optic and single mode (SM) optical fiber components. No polarization maintaining (PM) fiber is used. The reference and sample beams interfere in two single mode fiber couplers. The system can display either a pair of OCT images corresponding to linear orthogonal polarization components or a pair of images consisting of a polarization insensitive (pure reflectivity) image and a linear birefringence retardation map. All images are 8 bit grayscale and are acquired by fast en face scanning (T-scan) at 2 frames/s. We demonstrate in vivo en face images of the optic nerve region and the peripheral cornea.