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Quantum-limited time-frequency estimation through mode-selective photon measurement

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Donohue, J. M. and Ansari, V. and Řeháček, Jaroslav and Hradil, Zdenek and Stoklasa, Bohumil and Paúr, Martin and Sánchez Soto, Luis Lorenzo and Silberhorn, C. (2018) Quantum-limited time-frequency estimation through mode-selective photon measurement. Physical review letters, 121 (9). ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.121.090501


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Abstract

By projecting onto complex optical mode profiles, it is possible to estimate arbitrarily small separations between objects with quantum-limited precision, free of uncertainty arising from overlapping intensity profiles. Here we extend these techniques to the time-frequency domain using mode-selective sum-frequency generation with shaped ultrafast pulses. We experimentally resolve temporal and spectral separations between incoherent mixtures of single-photon level signals ten times smaller than their optical bandwidths with a tenfold improvement in precision over the intensity-only Cramer-Rao bound.


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Additional Information:

We thank K. Bonsma-Fisher, O. DiMatteo, J. Gil-López, M. Allgaier, C. Fabre, N. Treps, and B. Brecht for fruitful discussions. This research has received funding from the European Unions (EU) Horizon 2020 research and innovation program under Grant Agreement No. 665148, the Grant Agency of the Czech Republic (Grant No. 18-04291S), Palacký University (Grant No. IGA-PrF-2018-003), and the Spanish MINECO (Grant No. FIS2015-67963-P). J. M. D. gratefully acknowledges support from Natural Sciences and Engineering Research Council of Canada.

Uncontrolled Keywords:Single-molecule microscopy; Fisher information; Parameter-estimation; Optical resolution; Conversion; Interferometry; Power
Subjects:Sciences > Physics > Optics
ID Code:49279
Deposited On:17 Oct 2018 17:57
Last Modified:14 Dec 2018 15:04

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