• Chinese Journal of Lasers
  • Vol. 44, Issue 8, 807002 (2017)
Wang Xuan1、2, Li Zhongliang1、2, Nan Nan1, Bu Yang1、2, Chen Yan1、2, Pan Liuhua1、2, Lu Yu1、2, Zeng Aijun1、2, and Wang Xiangzhao1、2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3788/CJL201744.0807002 Cite this Article Set citation alerts
    Wang Xuan, Li Zhongliang, Nan Nan, Bu Yang, Chen Yan, Pan Liuhua, Lu Yu, Zeng Aijun, Wang Xiangzhao. A Method to Improve Sensitivity of Swept Source Optical Coherence Tomography System[J]. Chinese Journal of Lasers, 2017, 44(8): 807002 Copy Citation Text show less

    Abstract

    A method to improve the sensitivity of swept source optical coherence tomography (SSOCT) system is proposed. In the SSOCT system, when the splitting ratio of the coupler before the balanced detector, is not 50%∶50%, the DC bias in the detected interference signal will affect the sensitivity of the system. In this study, the influence of the splitting ratio of the coupler on the sensitivity is theoretically analyzed when the DC bias is introduced into interference signal, and it is proved that the sensitivity can be improved by the method of adjusting the splitting ratio and increasing the reference arm′s energy. Based on the parameters of the devices of the SSOCT system in the experiment, the sensitivity of the system is numerically simulated. The numerical simulation results prove the effectiveness of the proposed method, and the experimental results show that the sensitivity is improved by 2.3 dB after the proposed method is applied.
    Wang Xuan, Li Zhongliang, Nan Nan, Bu Yang, Chen Yan, Pan Liuhua, Lu Yu, Zeng Aijun, Wang Xiangzhao. A Method to Improve Sensitivity of Swept Source Optical Coherence Tomography System[J]. Chinese Journal of Lasers, 2017, 44(8): 807002
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