Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Atmospheric channel measurements for long-range optical time transfer and quantum state dissemination

Jul 19, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Precision measurement and tests of fundamental physics Poster session


Free-space optical time transfer is a key enabling technology for intercontinental comparisons of optical atomic clock time scales and the eventual redefinition of the SI second. However, full realization of their potential for femtosecond-level intercomparisons requires ground-to-space (and possibly space-to-space) link operation. We present a series of long-range atmospheric channel characterizations and time transfer demonstrations, through a variety of atmospheric turbulence conditions. In addition to time transfer, our channel measurements are also relevant for long-range quantum communications, including space-to-ground quantum resource dissemination.

Approved for public release; distribution is unlimited. Public Affairs release approval AFRL-2022-2073.

Presenter name Benjamin Stuhl

Primary authors

Dr Benjamin Stuhl (Space Dynamics Laboratory) Dr William Swann (NIST) Dr Martha Bodine (NIST) Dr Holly Leopardi (Space Dynamics Laboratory) Tyler Wright (Air Force Research Laboratory) Dr Jean-Daniel Deschênes (OctoSig) Emily Hannah (University of Colorado Boulder) Dr Nathan Newbury (NIST) Dr Laura Sinclair (NIST)

Presentation materials

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