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Tissue birefringence characterization by use of fiber-based polarization-sensitive optical coherence tomography

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A fiber-based polarization-sensitive optical coherence tomography system was described. The polarization modulator in this system was introduced in the reference arm rather than in the source arm, providing an increased power delivered from light source to sample. Based on angle preservation of Stokes vectors in the PS-OCT system, Stokes parameters of backscattered light measured at the detection arm were used to determine the phase retardation of birefringence samples as a function of depth. With the developed PS-OCT system, investigation on birefringence alternation of ligament under different physical condition was carried out.

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