Time and frequency
Frequency is the physical quantity that can be most precisely measured, and so is time, its inverse quantity. Many other physical quantities are linked to time, like for instance length, which is related to time by the vacuum speed of light. A major assignment of National Metrology Institutes is therefore providing accurate standards of the SI second. The vision of distributing time or frequency via optical fiber networks is now becoming reality.
Likewise, experiments in fundamental research and astronomy involve synchronization of remote frequency references and thus rely on stable optical links. Where fiber links are not practicable, the applications make use of free space transmission of a stable frequency. The technology enables new generation global satellite navigation systems (GNSS) and satellite geodesy, where they serve as a reference for free space optical communication links between satellites and ground-based apparatus such as telescopes or laser ranging system.
Your direct line to our expert: Dr. Benjamin Sprenger
More information is available in our webinars:
Frequency-Comb-Enabled Quantum 2.0 Applications
Synchronized view into the Universe
- Atmospheric Timing Transfer and Ultrafast Optical Sampling Based on Frequency Combs
- SCIENTIFIC PUBLICATION: Coherent fibre link for synchronization of delocalized atomic clocks
- SCIENTIFIC PUBLICATION: Advanced technologies for satellite navigation and geodesy
- SCIENTIFIC PUBLICATION: Optical Frequency Transfer over a Single-Span 1840 km Fiber Link
- SCIENTIFIC PUBLICATION: Photonic microwave signals with zeptosecond-level absolute timing noise
- SCIENTIFIC PUBLICATION: Two-way coherent frequency transfer in a commercial DWDM communication network in Sweden
- SCIENTIFIC PUBLICATION: Multi-arm Ultra-low Noise Er:fiber Frequency Comb Comparison
- SCIENTIFIC PUBLICATION: 20 Years and 20 Decimal Digits: A Journey With Optical Frequency Combs