Time-Frequency installations

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ULISS: world record for stabilityULISS : Cristal de saphir

ULISS, the best cryogenic sapphire oscillator currently available on the market, ensures a relative stability of less than 3x10-15 in integration time, from the second to the entire day, which may be illustrated by a drift equivalent to 0.5 ns per day, or a half a billionth of a second.

In addition to its very high precision, the oscillator has a self-maintainability of two years.

Initially developed for the European Space Agency (ESA), ULISS is now also applied in geodesy, space navigation, radio astronomy, metrology, industrial oscillator qualification, fundamental physics, etc.

An ultra-stable optic cavity and a commercialized femtosecond laser (Menlo)

This oscillator of very low instability gives the best performances in integration times of less than a second and can generate signals in frequencies from the micro-wave to optics.

Masers, for long-term references

In the future, the laboratory will be equipped with 3 Masers, for long-term references (as of 10,000 s, or an entire day).


The Refimeve project

The goal is to connect FEMTO-ST with the primary standards of the SYRTE frequencies.

In 2014-2015 the laboratory is due to receive a frequency reference from the SYRTE atomic clocks (Observatory of Paris). This will enable synchronization with the SYRTE and the laboratory will then possess a “true” second

The Oscillator-IMP project

The objective of this project, undertaken by the Time-Frequency Department of FEMTO-ST in partnership with Besançon’s UTINAM Institute (universe, transport, interfaces, nanostructures, atmosphere and environment, molecules) is to achieve the world’s best platform for oscillator characterization, within the range of time integration from the ms to the entire day, covering a very broad spectrum (from the MHz to the THz) and including optic frequencies (microwave photonics).

This platform is destined for use in research but will also be made available to industry via collaborative projects or presentations of services. Oscillator-IMP will thus allow a significant improvement in the metrological performances of measurements taken for both service activities and the needs of research and development.