Self-calibrating optical low-coherence reflectometry with energy-time entangled photons for absolute distance measurements

Unternährer, Manuel; Stefanov, André (2020). Self-calibrating optical low-coherence reflectometry with energy-time entangled photons for absolute distance measurements. Quantum science and technology, 5(4), 045009. IOP Publishing 10.1088/2058-9565/aba887

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Optical low-coherence reflectometry is capable of unambiguously measuring positions of stacked, partially reflective layers in a sample object. It relies on the low coherence of the light source and the absolute distances are obtained from the position reading of a mechanical motor stage. We show how to exploit the simultaneous high and low coherence properties of energy-time entangled photon pairs to directly calibrates the position scale of an OLCR scan with a reference laser wavelength. In experiment, a precision of 1.6\,nm and good linearity is demonstrated.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Lasers

UniBE Contributor:

Stefanov, André

Subjects:

500 Science > 530 Physics

ISSN:

2058-9565

Publisher:

IOP Publishing

Language:

English

Submitter:

André Stefanov

Date Deposited:

30 Mar 2022 10:28

Last Modified:

03 Apr 2022 01:56

Publisher DOI:

10.1088/2058-9565/aba887

BORIS DOI:

10.48350/167298

URI:

https://boris.unibe.ch/id/eprint/167298

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