Advantages and limitations of using positively frequency correlated light in quantum optical coherence tomography

Abstract

Spontaneous-Parametric-Down-Conversion-produced photons, which are positively correlated in frequency, possess properties favorable in the context of Fourier-domain Quantum Optical Coherence Tomography (Q-OCT). These include the ease of generation and a high number of anti-diagonals needed for efficient artefact removal. On the other hand, a small diagonal width leads to a reduced axial resolution of the resultant images. The spectral characteristics of such light is analyzed both theoretically and experimentally and its validity for Q-OCT imaging discussed.