David Gozzard (ICRAR/UWA)David Gozzard Colloquium: Phase Stabilization for Space Science Applications: from radio telescopes to laser c |
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The Australia Telescope National Facility Colloquium | |||
15:00-16:00 Wed 05 May 2021 | |||
Online |
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AbstractThe distribution of high-precision time and frequency signals from atomic clocks is indispensable for many fields of fundamental and applied science. Timescale comparison between atomic clocks enables the highest-precision tests of foundational physics including tests of the General Theory of Relativity, the variability of fundamental constants, and searches for dark matter candidates. Radio astronomy, geodesy, and global navigation satellite systems also benefit from networks of atomic clocks. In order to fully exploit the precision of the atomic clocks, the transmission link must be more stable than the atomic clocks themselves. However, disturbances on the link (thermal effects and vibration, in the case of an optical fibre, and atmospheric turbulence, in the case of a free-space link) cause phase and amplitude noise that greatly degrade the precision of the transmission.
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