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Polarization Independent Optical Coherence Tomography

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Parmar,  Asha
Singh Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany;

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Sharma,  Gargi
Singh Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Singh,  Kanwarpal
Max-Planck-Zentrum für Physik und Medizin, Max Planck Institute for the Science of Light, Max Planck Society;
Singh Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany;

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Citation

Parmar, A., Sharma, G., & Singh, K. (2022). Polarization Independent Optical Coherence Tomography. IEEE Photonics Journal, 14(2). doi:10.1109/JPHOT.2022.3148721.


Cite as: https://hdl.handle.net/21.11116/0000-000B-3B5E-B
Abstract
Optical coherence tomography (OCT) is a well established imaging modality for high-resolution three-dimensional imaging in clinical settings. While imaging, care must be taken to minimize the imaging artifacts related to the polarization differences between the sample and the reference signals. Current OCT systems adopt complicated mechanisms, such as the use of multiple detectors, polarization-maintaining fibers, polarization controllers to achieve polarization artifacts free sample images.
Often the polarization controllers need readjustment which is not suitable for clinical settings. In this work, we demonstrate a simple approach that can minimize the polarization-related artifacts in the OCT systems. Polarization artifact-free images are acquired using two orthogonally polarized reference signals where the orthogonal polarization is achieved using a Faraday mirror. In the current approach, only a single detector is required which makes the current approach compatiblewith swept-source or camera-basedOCT systems. Furthermore, no polarization controllers are used in the system which increases the system stability while minimizing the artifacts related to the sample birefringence, polarization change due to the sample scattering, and polarization change due to the optical fiber movements present in the system.