Multi-window approach to improve resolution, side-lobe suppression, and phase sensitivity in OCT

Walker, Clayton B.; Wisniowiecki, Anna M.; Tang, Jack Lipei; Oghalai, John S.; Applegate, Brian E.

doi:10.1117/12.2613301

Cited by 1 publication

(1 citation statement)

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“…In this abstract we explore the ability of IAA-based SE-OCT to suppress phase leakage and reconstruct relative motion of vibrating interfaces in the vicinity of a strong reflecting interface. Reducing phase leakage improves the axial sectioning ability of phase-sensitive OCT [4]. This could be useful in applications like vibrometry [5], especially when the axial resolution is sacrificed for extended imaging range.…”

Section: Introductionmentioning

confidence: 99%

Accurate phase estimation of vibrating interfaces using spectral estimation optical coherence tomography

de Wit,

Glentis,

Kalkman

2023

Optical Coherence Imaging Techniques and Imaging in Scattering Media V

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Phase sensitive optical coherence tomography (OCT) is able to measure small axial motion at the level of ten nanometer. However, when interfaces are located close to each other, the phase of one interface may influence the phase of the other interface. This spectral leakage hampers the ability to see relative motion between structures within the sample, especially when the separation is below the axial resolution. Spectral estimation OCT (SE-OCT) based on IAA can not only improve the axial resolution beyond the conventional bandwidth limitation, but also reduce this spectral leakage. Here we show accurate reconstruction of the vibration of an interface at sub-resolution distance from a highintensity interface with a different vibration frequency. Phase preserved IAA successfully reduces spectral leakage and outperforms conventional DFT-based reconstruction methods.

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Section: Introductionmentioning

confidence: 99%