Enhancing roll-off performance in SD-OCT with a frequency comb

Regina Magalhaes; Michael Serafino; John Oghalai; Brian Applegate

doi:10.1117/12.3005759

12 March 2024 Enhancing roll-off performance in SD-OCT with a frequency comb

Regina Magalhaes, Michael Serafino, John Oghalai, Brian Applegate

Proceedings Volume 12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII; 128300K (2024) https://doi.org/10.1117/12.3005759
Event: SPIE BiOS, 2024, San Francisco, California, United States

Conference Poster

Abstract

A strong roll-off performance in Optical Coherence Tomography (OCT) is essential for imaging the inner ear, as it enables better depth resolution and penetration into the delicate structures within the temporal bone. This ensures higher-quality images and improved visualization of inner ear pathologies, thereby rendering OCT a valuable non-invasive tool for accurate diagnosis and assessment of inner ear conditions. In this work, we propose a spectral-domain OCT design that incorporates a frequency comb light source to enhance the penetration depth through improved roll-off performance. A broadband (~87nm at 3dB) comb source was developed centered near 1300nm, producing ~1000 lines spaced by a constant dk (~0.83cm^-1), which were coupled into a Mach-Zehnder interferometer and then detected by a spectrometer. Our initial results demonstrate an >80% improvement in 3-dB roll-off compared to the same system without the comb, i.e., with a broadband light source as used in the classical SD-OCT design.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Regina Magalhaes, Michael Serafino, John Oghalai, and Brian Applegate "Enhancing roll-off performance in SD-OCT with a frequency comb", Proc. SPIE 12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII, 128300K (12 March 2024); https://doi.org/10.1117/12.3005759

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