Trasischker Wolfgang, Zotter Stefan, Torzicky Teresa, Baumann Bernhard, Haindl Richard, Pircher Michael, Hitzenberger Christoph K
Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Waehringer Guertel 18-20, 4L, A-1090 Vienna, Austria.
Biomed Opt Express. 2014 Jul 28;5(8):2798-809. doi: 10.1364/BOE.5.002798. eCollection 2014 Aug 1.
We present a newly developed single mode fiber based swept source polarization sensitive optical coherence tomography system using a single input state at 1040 nm. Two non-polarizing fiber based beam splitters are combined to form a Mach-Zehnder interferometer, while two polarizing beam splitters are used to obtain a polarization sensitive detection. Both types of beam splitters solely feature conventional single mode fibers. Polarization control paddles are used to set and maintain the polarization states in the fibers of the interferometer and detection unit. By use of a special paddle alignment scheme we are able to eliminate any bulk optic wave plates and polarization maintaining fibers in the interferometer and detection paths while preserving the advantages of a single input state system that illuminates the sample with circularly polarized light. To demonstrate the capabilities of our system, we performed retinal measurements on healthy human volunteers.
我们展示了一种新开发的基于单模光纤的扫频源偏振敏感光学相干断层扫描系统，该系统使用1040nm的单个输入状态。两个基于非偏振光纤的分束器组合形成马赫曾德尔干涉仪，同时使用两个偏振分束器进行偏振敏感检测。这两种类型的分束器均仅采用传统单模光纤。偏振控制光阑用于设置和维持干涉仪及检测单元光纤中的偏振状态。通过使用一种特殊的光阑对准方案，我们能够在干涉仪和检测路径中消除任何块状光学波片和保偏光纤，同时保留用圆偏振光照射样品的单输入状态系统的优点。为了展示我们系统的性能，我们对健康人类志愿者进行了视网膜测量。
