All fiber polarization insensitive detection for spectrometer based optical coherence tomography using optical switch

Otuya, David O.; Sharma, Gargi; Tearney, Guillermo J.; Singh, Kanwarpal

doi:10.1364/osac.2.003465

Cited by 1 publication

(2 citation statements)

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“…Our approach enables us to mitigate the polarizationdependent image artifacts which come from a combination of the sample birefringence, scattering within the sample, and fiber movements. Unlike previous approaches [30][31][32], we can minimize the polarization-dependent image artifacts without the use of any active polarization controller. This improves the system stability allowing for faster clinical adoption.…”

Section: Discussionmentioning

confidence: 99%

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Polarization Independent Optical Coherence Tomography

2022

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Optical coherence tomography (OCT) is a well established imaging modality for high-resolution threedimensional 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 compatible with swept-source or camera-based OCT 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.

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Section: Discussionmentioning

confidence: 99%

“…The polarization artifacts in OCT have also been minimized using optical switching unit and synchronously detecting two orthogonally polarized images on a single spectrometer [32]. However, since the images are acquired sequentially, the sample motion during the image acquisition can deteriorate the image quality.…”

Section: Introductionmentioning

confidence: 99%