导管PS-OCT系统中双态数值色散补偿方法  

Dual-State Numerical Dispersion Compensation Method for Catheter Based PS-OCT System

作　　者：丁振扬 赖天铎 陶魁园 朱亚楠 朱丰裕 李清瑞 商明健 胡景淇 孙可亮 刘琨 江俊峰 刘铁根 Ding Zhenyang;Lai Tianduo;Tao Kuiyuan;Zhu Yanan;Zhu Fengyu;Li Qingrui;Shang Mingjian;Hu Jingqi;Sun Keliang;Liu Kun;Jiang Junfeng;Liu Tiegen(School of Precision Instrument and Optoelectronics Engrineering,Tianjin University,Key Laboratory of Opto-Electronics Information Technology,Ministry of Education,Tianjin Optical Fiber Sensing Engineering Center,Tianjin 300072,China)

机构地区：[1]天津大学精密仪器与光电子工程学院,光电信息技术教育部重点实验室,天津市光纤传感工程中心,天津300072

出　　处：《光学学报》2021年第6期92-100,共9页Acta Optica Sinica

基　　金：国家自然科学基金(61975147,61635008,61735011,61505138);国家重点研发计划(2019YFC0120701)。

摘　　要：导管光纤偏振敏感光学相干层析成像(PS-OCT)系统在心血管斑块定量分析上具有显著优势,搭建了基于保偏光纤成像深度复用的双偏振态导管PS-OCT系统。由于保偏光纤具有较强的双折射色散,因此难以利用一套色散系数实现双输入态色散补偿。针对这一难点问题,提出了一种用于导管PS-OCT系统的双态数值色散补偿方法。这种方法可对不同输入偏振态的色散系数进行调整,以补偿由保偏光纤双折射色散引起的不同输入偏振态色散的差异。实验结果表明,所提方法可以有效地解决材料色散、双折射色散带来的脉冲展宽、图像模糊、偏振对比度差等问题,保证了导管PS-OCT实现高质量的生物样品双折射相位延迟成像。A catheter based fiber polarization-sensitive optical coherence tomography(PS-OCT) system has significant advantages in quantitative analysis of cardiovascular plaques. A dual polarization state catheter based PS-OCT system is established based on polarization maintaining fibers(PMFs) with imaging depth multiplexing. Due to the strong birefringence dispersion of PMFs, it is difficult to use a set of dispersion coefficients to realize the dual-input-state dispersion compensation. In order to solve this problem, this paper proposes a dual-state numerical dispersion compensation method for the catheter based PS-OCT system. This method can adjust dispersion coefficients of different input polarization states to compensate for the difference in dispersion of different input polarization states caused by the birefringence dispersion of the polarization maintaining fiber. Experimental results show that the proposed method can effectively solve the problems such as pulse broadening, image blurring, and poor polarization contrast caused by material dispersion and birefringence dispersion, which ensures high-quality phase retardation imaging of biological samples in the catheter based PS-OCT.

关 键 词：医用光学 相干成像 光学相干层析成像 导管光学相干层析成像 偏振敏感光学相干层析成像 色散补偿 

分 类 号：TN29[电子电信—物理电子学]