基于光电振荡器的扫频偏振光学相干层析双折射率检测技术

项目名称： 基于光电振荡器的扫频偏振光学相干层析双折射率检测技术

项目编号： No.61471116

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 陈翰

作者单位： 东南大学

项目金额： 75万元

中文摘要： 本项目针对应力/温度可校准的扫频偏振光学相干层析双折射率检测技术展开研究，提出一种基于偏振干涉结构双环光电振荡器的高精度检测方法，将对生物组织的双折射率变化的检测转变为对微波信号频率的测量，并使用高速扫频光源提高了系统的测试敏感度；通过采用控制注入电流的方式，来调谐半导体光放大器的动态双折射率以补偿测试环境所造成的光电振荡器谐振腔长度变化，实现了应力/温度可校准的双折射率检测技术。先期验证的数据结果及分析表明，本项目所提出的扫频偏振光学相干层析双折射率检测技术可以实现精度达到分辨10μm生物组织0.01双折射率变化的指标要求，在200KHz/400KHz扫频速度下，实现高分辨率光学相干层析成像应用。

中文关键词： 光学相干层析；微波光子学；光电振荡器；半导体光放大器；双折射率

英文摘要： This project investigates the birefringence detection method with a temperature and stress correctable function using frequency sweeping polarization-sensitive optical coherence tomographic (OCT) techniques. A novel detection technique based on a polarization interfered dual-loop optoelectronic oscillator (OEO) is presented, which transforms the typical biological tissue birefringence detection to the visualized frequency measurement of the microwave signals, and the measuring precision is improved by using the high speed frequency sweeping laser. The proposed scheme also designs a temperature and stress correctable function using a semiconductor optical amplifier (SOA). The SOA is driven by a tuned injection current to control the dynamic birefringence, which is used to compensate the length variation of the resonant cavities caused by the environment conditions in the dual-loop OEO. The measured results and theoretical analyses show the proposed frequency sweeping polarization-sensitive OCT birefringence detection technique has a 0.01/10μm birefringence detecting resolution and 400KHz imaging speed in the biological tissue.

英文关键词： optical coherence tomographic;microwave photonic;optoelectronic oscillator;semiconductor optical amplifier;birefringence