Interference effects in quantum-optical coherence tomography using spectrally engineered photon pairs
| Autor: | Héctor Cruz Ramírez, Roberto Ramírez Alarcón, Alí M Angulo Martínez, Pablo Yepiz Graciano, Dorilian Lopez-Mago, Jesús Garduño-Mejía, Martha Rosete-Aguilar, Alfred B. U'Ren, Gustavo Castro-Olvera |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Photon FOS: Physical sciences lcsh:Medicine Interference (wave propagation) Article 03 medical and health sciences 0302 clinical medicine Optics Optical coherence tomography medicine lcsh:Science Single photons and quantum effects Quantum Physics Quantum optics Multidisciplinary medicine.diagnostic_test business.industry lcsh:R Bandwidth (signal processing) Imaging and sensing 030104 developmental biology Amplitude Femtosecond Continuous wave lcsh:Q business 030217 neurology & neurosurgery Optics (physics.optics) Physics - Optics |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-14 (2019) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-019-45088-0 |
| Popis: | Optical-coherence tomography (OCT) is a technique that employs light in order to measure the internal structure of semitransparent, e.g. biological, samples. It is based on the interference pattern of low-coherence light. Quantum-OCT (QOCT), instead, employs the correlation properties of entangled photon pairs, for example, generated by the process of spontaneous parametric downconversion (SPDC). The usual QOCT scheme uses photon pairs characterised by a joint-spectral amplitude with strict spectral anti-correlations. It has been shown that, in contrast with its classical counterpart, QOCT provides resolution enhancement and dispersion cancellation. In this paper, we revisit the theory of QOCT and extend the theoretical model so as to include photon pairs with arbitrary spectral correlations. We present experimental results that complement the theory and explain the physical underpinnings appearing in the interference pattern. In our experiment, we utilize a pump for the SPDC process ranging from continuous wave to pulsed in the femtosecond regime, and show that cross-correlation interference effects appearing for each pair of layers may be directly suppressed for a sufficiently large pump bandwidth. Our results provide insights and strategies that could guide practical implementations of QOCT. |
| Databáze: | OpenAIRE |
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