Abstract
We describe a fiber-based variable-incidence-angle (VIA) polarization-sensitive swept-source optical coherence tomography (PS-SS-OCT) system to determine the 3-D optical axis of birefringent biological tissues. Single-plane VIAPS- OCT is also explored which requires measurement of the absolute fast-axis orientation. A state-of-the-art PS-SS-OCT system with some improvements both in hardware and software was used to determine the apparent optical birefringence of equine tendon for a number of different illumination directions. Polar and azimuthal angles of cut equine tendon were produced by VIA method and compared with the nominal values. A quarter waveplate (QWP) and equine tendon were used as test targets to validate the fast-axis measurements using the system. Polar and azimuthal angles of cut equine tendon broadly agreed with the expected values within about 8% of the nominal values. A theoretical and experimental analysis of the effect of the sample arm fiber on determination of optical axis orientation using a proposed definition based on the orientation of the eigenpolarization ellipse experimentally confirms that this algorithm only works correctly for special settings of the sample arm fiber. A proposed algorithm based on the angle between Stokes vectors on the Poincaré sphere is confirmed to work for all settings of the sample arm fiber. A calibration procedure is proposed to remove the sign ambiguity of the measured orientation and was confirmed experimentally by using the QWP.
Original language | English |
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Title of host publication | Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV |
Editors | James G. Fujimoto, Joseph A. Izatt, Valery V. Tuchin |
Publisher | SPIE |
Number of pages | 14 |
Volume | 7889 |
ISBN (Print) | 9780819484260 |
DOIs | |
Publication status | Published - 11 Feb 2011 |
Externally published | Yes |
Event | Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV - San Francisco, United States Duration: 22 Jan 2011 → 27 Jan 2011 Conference number: 15 |
Publication series
Name | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
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Volume | 7889 |
ISSN (Print) | 1605-7422 |
Conference
Conference | Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV |
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Country/Territory | United States |
City | San Francisco |
Period | 22/01/11 → 27/01/11 |