A Method to Improve Sensitivity of Swept Source Optical Coherence Tomography System

Fig. 2. (a) Interference signal with DC bias; (b) interference signal without DC bias; (c) acquired interference signal by adjusting splitting ratio and enhancing power of reference arm

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Fig. 3. Schematic of SSOCT system

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Fig. 4. Variations in (a) power of the reference arm and (b) signal to noise ratio before and after applying the proposed method when splitting ratio changes from 40%…60% to 50%…50%

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Table 1. Msignal, Nnoise, power of reference arm and sensitivity of the system before and after applying the proposed method
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Table 1. Msignal, Nnoise, power of reference arm and sensitivity of the system before and after applying the proposed method
Condition M_signal N_noise Power of reference arm /μW Sensitivity /dB
Before 0.931×10⁷ 4833.7 18 100.1
After 1.12×10⁷ 5230.7 45 102.4

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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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