ABSTRACT In silicon‐based swept‐source optical coherence tomography (SS‐OCT), the monolithically integrated auxiliary interferometer was fully utilised to resample the main interferometer signal via a Hilbert transform, thereby reconstructing the complex signal for accurate phase extraction. The flat wavelength response from the Mach‐Zehnder directional coupler was built in the optical coupler of the chip‐based SS‐OCT. Finally, an axial resolution of 23.4 µm was demonstrated, which is limited by the silicon wire's chromatic dispersion. Practical validation was conducted through cross‐sectional imaging of human molar samples, demonstrating the system's capability for dental and biomedical applications. A voltage‐controlled Galvano‐meter scanner enables precise lateral beam positioning, facilitating high‐quality B‐scan acquisition across the sample surface. This silicon‐based integrated SS‐OCT lays the foundation for next‐generation portable optical coherence tomography systems with improved performance metrics suitable for both clinical and research applications.
Hung et al. (Thu,) studied this question.
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