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Quantum Optical Coherence Tomography (Q-OCT) is the non-classical counterpartof Optical Coherence Tomography (OCT) - a high-resolution 3D imaging techniquebased on white-light interferometry. Because Q-OCT uses a source offrequency-entangled photon pairs, not only is the axial resolution not affectedby dispersion mismatch in the interferometer, but is also inherently improvedby a factor of square root of two. Unfortunately, practical applications ofQ-OCT are hindered by image-scrambling artefacts and slow acquisition times.Here, we present a theoretical analysis of a novel approach that is free ofthese problems: Q-OCT with joint spectrum detection (JS-Q-OCT). Based on aphoton pair coincidence detection as in the standard Q-OCT configuration, italso discerns, each photon pair by their wavelength. We show that all theinformation about the internal structures of the object is encoded in the jointspectrum and can be easily retrieved through Fourier transformation. No depthscanning is required, making our technique potentially faster than standardQ-OCT. Finally, we show that the data available in the joint spectrum enablesartefact removal and discuss prospective algorithms for doing so.

Quantum Optical Coherence Tomography using two photon joint spectrum detection (JS-Q-OCT)