Acta Optica Sinica, Volume. 39, Issue 11, 1111002(2019)
Complex Frequency Domain Doppler Optical Coherence Tomography Based on Phase Difference Resolved Technology
The full-range complex frequency domain optical coherence tomography based on sinusoidal phase modulation has the advantages of good effect on suppression of the mirror image and high velocity sensitivity with the highest signal-to-noise ratio (SNR) near the zero-path difference position. It has been widely utilized in the field of Doppler imaging. However, this technology is not suitable for the sample with high-speed motion affected by phase demodulation. In this paper, we present a novel approach, i.e., the complex frequency domain Doppler optical coherence tomography, based on phase difference resolved technology. After obtaining the interference tomography signal by Fourier transform of two-dimensional interference spectrum signal, and using the differential phase of the adjacent tomography signal to reconstruct the complex tomography signal, we obtain the full-range tomography images and Doppler images after sinusoidal phase demodulation. It is shown from the simulation and experimental results that this technique can reduce the broadening of the signal spectrum due to high-speed motion, so that more accurate Doppler phase shift and larger velocity detection range can be obtained.
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Hongqin Chen, Nan Nan, Xi Zhang, Ziyang Chen, Jixiong Pu, Sasaki Osami, Xiangzhao Wang. Complex Frequency Domain Doppler Optical Coherence Tomography Based on Phase Difference Resolved Technology[J]. Acta Optica Sinica, 2019, 39(11): 1111002
Category: Imaging Systems
Received: May. 22, 2019
Accepted: Jul. 24, 2019
Published Online: Nov. 6, 2019
The Author Email: Pu Jixiong (jxpu@163.com), Osami Sasaki (osamija@gmail.com)