Using complex master-slave protocol for OCT with bidirectional sweeping laser

Alejandro Martínez Jiménez; Esteban Andres Proano Grijalva; Adrian Bradu; Bjorn Meyer; Thor Ansbaek; Kresten Yvind; Adrian Podoleanu

doi:10.1117/12.3005674

13 March 2024 Using complex master-slave protocol for OCT with bidirectional sweeping laser

Alejandro Martínez Jiménez, Esteban Andres Proano Grijalva, Adrian Bradu, Bjorn Meyer, Thor Ansbaek, Kresten Yvind, Adrian Podoleanu

Author Affiliations +

Proceedings Volume PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII; PC128301I (2024) https://doi.org/10.1117/12.3005674
Event: SPIE BiOS, 2024, San Francisco, California, United States

Conference Poster

Abstract

This work presents a novel approach to the use of bidirectional swept sources. A MEMS-VCSEL light source with a bidirectional sweeping rate of 1.6MHz is used. Bidirectional sweeping poses a challenge as the tuning curve is different for each sweep. To exploit the full performance of the swept source, both sweeps within the bidirectional sweeping must be utilized and compensated. The proposed approach involves a software solution based on the Master-Slave protocol, where sets of theoretically inferred channelled spectra (masks) are prepared in advance for each sweep. The phase retrieval method called CMS (Complex Master Slave) is employed to handle bidirectional sweeping SS-OCT, involving the calculation of two sets of functions for each sweeping direction. The correct set of masks is used for each sweep direction to accurately represent A-Scan peaks. Differences in the sweep are analysed. Finally, the proposed method is successfully tested on posterior and anterior chambers.

Citation Download Citation

Alejandro Martínez Jiménez, Esteban Andres Proano Grijalva, Adrian Bradu, Bjorn Meyer, Thor Ansbaek, Kresten Yvind, and Adrian Podoleanu "Using complex master-slave protocol for OCT with bidirectional sweeping laser", Proc. SPIE PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII, PC128301I (13 March 2024); https://doi.org/10.1117/12.3005674

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