Götzinger Erich, Baumann Bernhard, Pircher Michael, Hitzenberger Christoph K
Center for Biomedical Engineering and Physics, Medical University of Vienna, Austria.
Opt Express. 2009 Dec 7;17(25):22704-17. doi: 10.1364/OE.17.022704.
We present a new ultra high resolution spectral domain polarization sensitive optical coherence tomography (PS-OCT) system based on polarization maintaining (PM) fibers. The method transfers the principles of our previous bulk optic PS-OCT systems to a fiberized setup. The phase shift between the orthogonal polarization states travelling in the two orthogonal modes of the PM fiber is compensated by software in post processing. Thereby, the main advantage of our bulk optics setups, i.e. the use of only a single input polarization state to simultaneously acquire reflectivity, retardation, optic axis orientation, and Stokes vector, is maintained. The use of a broadband light source of 110 nm bandwidth provides improved depth resolution and smaller speckle size. The latter is important for improved resolution of depolarization imaging. We demonstrate our instrument for high-resolution PS-OCT imaging of the healthy human retina.
我们展示了一种基于保偏（PM）光纤的新型超高分辨率光谱域偏振敏感光学相干断层扫描（PS-OCT）系统。该方法将我们之前的体光学PS-OCT系统的原理转移到了光纤装置中。在保偏光纤的两个正交模式中传播的正交偏振态之间的相移在后期处理中通过软件进行补偿。因此，我们体光学装置的主要优点得以保留，即仅使用单个输入偏振态同时获取反射率、延迟、光轴方向和斯托克斯矢量。使用带宽为110 nm的宽带光源可提高深度分辨率并减小散斑尺寸。后者对于改善去极化成像的分辨率很重要。我们展示了用于健康人视网膜高分辨率PS-OCT成像的仪器。
