Seeded SU(1,1) interferometry for Fourier-domain optical coherence tomography

Abstract:We demonstrate Fourier-domain optical coherence tomography (FD-OCT) based on a seeded SU(1,1) interferometer. Multilayer objects are probed with broadband light centered at 1550nm, while depth-resolved 3D images are reconstructed from photon flux measurements centered at 810nm. We show that, in the low parametric-gain regime, seeding increases the photon flux, enabling volumetric imaging with a spectrometer rather than single-photon detectors. Our analysis further shows that, under the conditions considered, seeding provides a more effective route to sensitivity enhancement than increasing the parametric gain.

15 pages, 8 figures. Supplementary material added in the main text

Optics (physics.optics); Quantum Physics (quant-ph)

arXiv:2608.18750 [physics.optics]

(or arXiv:2608.18750v1 [physics.optics] for this version)

https://doi.org/10.48550/arXiv.2608.18750 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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