Affiliation:
1. Tianjin University
2. Institute of Optical Fiber Sensing of Tianjin University
3. Key Laboratory of Opto-electronics Information Technology (Tianjin University)
4. Tianjin Institute of Metrological Supervision and Testing
5. Nanjing Forssmann Medical Technology Co.
Abstract
In catheter based polarization sensitive optical coherence tomography (PS-OCT), a optical fiber with a rapid rotation in the catheter can cause low signal-to-noise ratio (SNR), polarization state instability, phase change of PS-OCT signals and then heavy noise-induced depolarization, which has a strong impact on the phase retardation measurement of the sample. In this paper, we analyze the noise-induced depolarization and find that the effect of depolarization can be reduced by polar decomposition after incoherent averaging in the Mueller matrix averaging (MMA) method. Namely, MMA can reduce impact of noise on phase retardation mapping. We present a Monte Carlo method based on PS-OCT to numerically describe noise-induced depolarization effect and contrast phase retardation imaging results by MMA and Jones matrix averaging (JMA) methods. The peak signal to noise ratio (PSNR) of simulated images processed by MMA is higher than about 8.9 dB than that processed by JMA. We also implement experiments of multiple biological tissues using the catheter based PS-OCT system. From the simulation and experimental results, we find the polarization contrasts processed by the MMA are better than those by JMA, especially at areas with high depolarization, because the MMA can reduce effect of noise-induced depolarization on the phase retardation measurement.
Funder
National Natural Science Foundation of China
Key Technologies Research and Development Program
Special Technical Support Project of China Market Supervision and Administration
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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