Swept source / Fourier domain polarization sensitive optical coherence tomography with a passive polarization delay unit
Name
Fujimoto-Swept Source.pdf
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1.49 MB
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Author(s)
Baumann, Bernhard
Choi, Woo Jhon
Potsaid, Benjamin M.
Huang, David
Duker, Jay S.
Fujimoto, James G.
Date Issued
April 2012
Journal
Optics Express
Publisher
Optical Society of America
Citation
Baumann, Bernhard et al. “Swept Source / Fourier Domain Polarization Sensitive Optical Coherence Tomography with a Passive Polarization Delay Unit.” Optics Express 20.9 (2012): 10229.
Version
Author's final manuscript
Abstract
Polarization sensitive optical coherence tomography (PS-OCT) is a functional imaging method that provides additional contrast using the light polarizing properties of a sample. This manuscript describes PS-OCT based on ultrahigh speed swept source / Fourier domain OCT operating at 1050nm at 100kHz axial scan rates using single mode fiber optics and a multiplexing approach. Unlike previously reported PS-OCT multiplexing schemes, the method uses a passive polarization delay unit and does not require active polarization modulating devices. This advance decreases system cost and avoids complex synchronization requirements. The polarization delay unit was implemented in the sample beam path in order to simultaneously illuminate the sample with two different polarization states. The orthogonal polarization components for the depth-multiplexed signals from the two input states were detected using dual balanced detection. PS-OCT images were computed using Jones calculus. 3D PS-OCT imaging was performed in the human and rat retina. In addition to standard OCT images, PS-OCT images were generated using contrast form birefringence and depolarization. Enhanced tissue discrimination as well as quantitative measurements of sample properties was demonstrated using the additional contrast and information contained in the PS-OCT images.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1364/OE.20.010229
