Spectral-Domain Quantum OCT with Frequency Scanning: Theoretical Proposal

The aim of this work is to develop a spectral-domain quantum optical coherence tomography approach, based on the control of the joint spectral amplitude of the entangled photons. An analytical expression is obtained that describes the signal of spectral quantum optical coherence tomography. The dependence of the interference signal on the change in the difference between the central frequencies of the spectral distributions of entangled photons was demonstrated. The effect of digital processing of an interference signal on the achievable axial spatial resolution was shown. The influence of the shape of the joint spectral amplitude of the entangled photons on the final interference signal was analyzed, and the possibility of improving the quality of the interference signal by controlling the properties of the spectral amplitude was considered.