Dual wavelength Hong-Ou-Mandel imaging

Ashley Lyons; Khaled Kassem; Daniele Faccio; Jack Radford

doi:10.1117/12.3009777

13 March 2024 Dual wavelength Hong-Ou-Mandel imaging

Ashley Lyons, Khaled Kassem, Daniele Faccio, Jack Radford

Proceedings Volume PC12852, Quantitative Phase Imaging X; PC1285201 (2024) https://doi.org/10.1117/12.3009777
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Hong-Ou-Mandel (HOM) interferometry, manifesting as photon bunching at a beamsplitter, can provide high precision optical path length sensing yet is robust to phase noise and immune to phase-wrapping. In this work we demonstrate how the sensitivity of HOM based imaging can be enhanced using dual wavelength illumination whilst maintaining its high level of robustness. We observe a beating in the second order correlation function due to the interference between the two wavelengths bands with a periodicity determined by the wavelength separation. These small-scale features can be used to precisely determine optical path length at the nanometre scale whilst a coarse (micron scale) estimation can be obtained by measuring only one of the bands.

Conference Presentation

Citation Download Citation

Ashley Lyons, Khaled Kassem, Daniele Faccio, and Jack Radford "Dual wavelength Hong-Ou-Mandel imaging", Proc. SPIE PC12852, Quantitative Phase Imaging X, PC1285201 (13 March 2024); https://doi.org/10.1117/12.3009777

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