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Proceedings Paper

Spectrally-resolved white-light quantum interferometry for high-accuracy optical measurements (Conference Presentation)
Author(s): Florian Kaiser; Panagiotis Vergyris; Djeylan Aktas; Charles Babin; Laurent Labonté; Sébastien Tanzilli; Carlos A. Alonso-Ramos

Paper Abstract

In this presentation, we will introduce the quantum equivalent of white-light interferometry. However, instead of a classical light source with thermal or poissonian statistics, we use energy-time entangled photon pairs. This provides one with several important advantages, which are highly relevant for high-accuracy measurements of chromatic dispersion: 1.) The interferometer does not have to be balanced, which improves the set-up time, especially when comparing different fibres. 2.) Two data fitting parameters are cancelling out, which reduces systematic errors significantly. 3.) The wavelength at which dispersion is measured is not extracted from the data, but is rather inferred with arbitrary precision using a wavemeter or an atomic reference. 4.) Twice as many interference fringes are observed for the same spectral bandwidth, allowing to measure dispersion in standard telecom fibres down to about 3 cm with a 140 nm bandwidth source. After introducing the concept and highlighting the quantum advantages, we will demonstrate the performance of the quantum approach by comparing it to the best state-of-the-art approaches. Statistical analysis is performed by 2 times 100 measurements using either technique. In terms of precision, the quantum (classical) approach achieves a 1-sigmal precision of 21 fs/nm/km (51 fs/nm/km). In addition, the classical approach presents a systematic error of 12 fs/nm/km, which is unlikely to occur using the quantum approach, as the related fitting parameters cancel out automatically. In summary, we believe that combining fundamental and conceptual advantages enabled by quantum optics is a promising approach for the future development of applications requiring precise and accurate measurements.

Paper Details

Date Published: 4 March 2019
Proc. SPIE 10933, Advances in Photonics of Quantum Computing, Memory, and Communication XII, 109330D (4 March 2019); doi: 10.1117/12.2517067
Show Author Affiliations
Florian Kaiser, Univ. Stuttgart (Germany)
Panagiotis Vergyris, Institut de Physique de Nice (France)
Djeylan Aktas, Institut de Physique de Nice (France)
Charles Babin, Institut de Physique de Nice (France)
Laurent Labonté, Institut de Physique de Nice (France)
Sébastien Tanzilli, Institut de Physique de Nice (France)
Carlos A. Alonso-Ramos, Ctr. de Nanosciences et de Nanotechnologies (France)

Published in SPIE Proceedings Vol. 10933:
Advances in Photonics of Quantum Computing, Memory, and Communication XII
Philip R. Hemmer; Alan L. Migdall; Zameer Ul Hasan, Editor(s)

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