19 February 2009 Polarization-maintaining fiber based optical coherence tomography for polarization-sensitive measurements
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We present a polarization-maintaining (PM) fiber based optical coherence tomography system for polarization-sensitive and phase-sensitive measurements. Using a single detector, a single depth scan accurately yields retardance and polarization-insensitive reflectivity information along an A-line. Interference patterns on the orthogonal polarization channels are frequency multiplexed and extracted by digital band-pass filters. Images are insensitive to sample rotation in plane perpendicular to ranging. The use of PM-fibers allows direct calculation of birefringence without correcting the polarization transformations known in single-mode non-PM fibers. The system can be configured for differential phase measurements with minor modifications. In this case, a dual detector setup in the detection arm is used, and frequency multiplexing is not utilized.
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Muhammad K. Al-Qaisi, Muhammad K. Al-Qaisi, Taner Akkin, Taner Akkin, } "Polarization-maintaining fiber based optical coherence tomography for polarization-sensitive measurements", Proc. SPIE 7168, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIII, 716819 (19 February 2009); doi: 10.1117/12.808621; https://doi.org/10.1117/12.808621

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