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Title: Polarization management to mitigate misalignment-induced fringe fading in fiber-based optical coherence tomography
Authors: Wang, Nanshuo
Liu, Xinyu
Xiong, Qiaozhou
Xie, Jun
Chen, Shi
Liu, Linbo
Keywords: Optical Coherence Tomography
Issue Date: 2017
Source: Wang, N., Liu, X., Xiong, Q., Xie, J., Chen, S., & Liu, L. (2017). Polarization management to mitigate misalignment-induced fringe fading in fiber-based optical coherence tomography. Optics Letters, 42(15), 2996-2999.
Series/Report no.: Optics Letters
Abstract: In fiber-based optical coherence tomography (OCT), the interference fringes suffer from the fading effect due to misalignment of the light polarization states between the reference and sample arms, resulting in sensitivity degradation and image intensity variation. We theoretically and experimentally analyzed the relation between the misalignment and the fading coefficient. Assuming that the variation of the light polarization in single-mode fiber (SMF) was a random process, we statistically quantified the fading effect. Furthermore, in OCT configuration based on the Michelson interferometer, we reported an interesting observation that the polarization states of light traveling a round-trip in SMF are not evenly distributed on the Poincare sphere. Based on this observation, we demonstrated the existence of an optimal output polarization state of the reference arm to mitigate the fading effect. We demonstrated that in an optimal setup, the statistical average signal-to-noise ratio could be 3.5 dB higher than a setup without proper polarization management.
ISSN: 0146-9592
DOI: 10.1364/OL.42.002996
Rights: © 2017 Optical Society of America (OSA). This paper was published in Optics Letters and is made available as an electronic reprint (preprint) with permission of Optical Society of America (OSA). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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