Abstract

Quantum Optical Coherence Tomography (Q-OCT) is a non-classical equivalent of Optical Coherence Tomography and is able to provide a twofold axial resolution increase and immunity to resolution-degrading dispersion. The main drawback of Q-OCT are artefacts which are additional elements that clutter an A-scan and lead to a complete loss of structural information for multilayered objects. Whereas there are very practical and successful methods for artefact removal in Time-domain Q-OCT, no such scheme has been devised for Fourier-domain Q-OCT (Fd-Q-OCT), although the latter modality—through joint spectrum detection—outputs a lot of useful information on both the system and the imaged object. Here, we propose two algorithms which process a Fd-Q-OCT joint spectrum into an artefact-free A-scan. We present the theoretical background of these algorithms and show their performance on computer-generated data. The limitations of both algorithms with regards to the experimental system and the imaged object are discussed.

Highlights

  • We propose two algorithms which process a Fd-Quantum Optical Coherence Tomography (Q-OCT) joint spectrum into an artefact-free A-scan

  • It recreates all the elements of joint spectrum’s diagonals: dispersion-cancelled and resolution-doubled structure as well as stationary and instationary artefact peaks, and adds new oscillatory artefact terms. Due to these additional artefacts, the correspondence of these two techniques is not ideal. Since both techniques are based on analogous mechanisms, the solutions of quantum-mimic Optical Coherence Tomography (OCT) are adapted for use in quantum OCT as is the case here

  • We have presented two algorithms for artefact reduction in Fourier-domain Quantum Optical Coherence Tomography (Fd-Q-OCT)

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Summary

Introduction

We propose two algorithms which process a Fd-Q-OCT joint spectrum into an artefact-free A-scan. A broadband pump laser is used to generate entangled photon pairs with a joint spectrum broad in the anti-diagonal direction.

Results
Conclusion

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