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Jones matrix analysis for a polarization-sensitive optical coherence tomography system using fiber-optic components.
B Hyle Park1, Mark C Pierce, Barry Cense
1Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA. hylepark@helix.mgh.harvard.edu
Optics Letters
|December 9, 2004
Summary
This study introduces a new method for polarization-sensitive optical coherence tomography, enabling accurate measurement of tissue birefringence and diattenuation using fiber optics. The technique ensures reliable polarization analysis for diverse biological samples.
Area of Science:
- Biomedical Optics
- Optical Engineering
- Medical Imaging
Background:
- Polarization-sensitive optical coherence tomography (PS-OCT) is crucial for analyzing birefringent properties of biological tissues.
- Existing PS-OCT methods often face limitations due to polarization effects introduced by fiber-optic components.
- Accurate quantification of birefringence, diattenuation, and optic axis orientation is essential for various diagnostic applications.
Purpose of the Study:
- To develop and validate a novel PS-OCT analysis method that overcomes limitations of fiber-optic components.
- To enable unrestricted use of fiber and fiber-optic components within the interferometer.
- To accurately measure sample birefringence, diattenuation, and relative optic axis orientation.
Main Methods:
- A novel Jones matrix approach was employed, comparing polarization states from sample surface and internal reflections.
- Pairs of depth scans with alternating perpendicular incident polarization states were utilized.
- The Poincaré sphere representation was used to analyze polarization states and ensure accurate birefringence detection, independent of fiber contributions.
Main Results:
- The method successfully yielded sample birefringence, diattenuation, and relative optic axis orientation.
- Validation against independent measurements confirmed the accuracy of calculated diattenuation for a polarizing sheet, chicken tendon, and muscle.
- The relative contributions of diattenuation and birefringence to Stokes vector displacement on the Poincaré sphere were quantified.
Conclusions:
- The presented analysis facilitates robust PS-OCT measurements by mitigating polarization artifacts from fiber optics.
- The novel Jones matrix approach provides accurate characterization of tissue optical properties, including birefringence and diattenuation.
- This technique enhances the diagnostic potential of PS-OCT for biological tissue analysis.