Research and Experiment on Key Technologies of Endoscopic Sweep Frequency OCT System

In this paper, a high-speed swept frequency laser light source is used, combined with FPGA and GPU acceleration technology to design a high-speed endoscopic Swept-source optical coherence tomography (SS-OCT) system. Several key parameters that affect the performance of the system are tested. The results show that the system’s imaging depth is 4. 5mm, imaging resolution is $7.3\mu \mathrm{m}$, and system sensitivity is 110dB in air. The image of finger tissue is stable and the structure is clear. When the rotation speed reaches 9000RPM, the real-time frame rate of the system can reach 141 frames per second.