In our study, we simulate aberration-diverse optical coherence tomography (AD-OCT) by coherently averaging astigmatic beams of different angles to investigate its capacity to improve imaging performance at large depths relative to a Gaussian control beam. We find that AD-OCT provides the greatest improvement for small numerical apertures (NA = 0.10) but only marginal improvement for larger numerical apertures (NA = 0.25). Optimal astigmatic foci separation was found to decrease as NA increased, and less than 10 states were required to see maximal improvement. These results suggest that AD-OCT improves imaging quality over conventional Gaussian-beam OCT for low NA systems after averaging just a few states.
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