Towards high-speed optical coherence tomography through downconversion master slave and bidirectional sweeping
Year: 2025
Type: conference-paper
Abstract: This paper presents the challenges of signal processing in optical coherence tomography (OCT) imaging systems using asymmetric MHz bidirectional sweeping lasers. It proposes a downconversion master-slave method as an alternative to traditional OCT protocols. This method uses analogue electronics to produce a downconverted radio frequency signal from the product between a master and a slave interferometer. The product compensates for sweep-to-sweep variations in laser emissions in real-time, eliminating the need for calibration. En-face images are demonstrated using a bidirectional laser sweeping at a rate of 1.6 MHz and a slow acquisition card with a sampling rate of only 2.5 MS/s.
DOI: 10.1117/12.3043871
Institutions: University of Kent, Technical University of Denmark
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4408604195