The only technology to provide a relative frequency stability better than 1x10-15 for integration times ranging from 1 s to 104 s (about 6x10-15 on the day). Uliss does not require the boring and especially expensive use of liquid helium, our technology is able to answering the most demanding applications.

What's new?

May 2020

Uliss team participated in the study "Magnetic sensitivity of the Microwave Cryogenic Sapphire Oscillator," published in Journal of Applied Physics (Vol.127, Issue 18).


December 2019

Uliss team participated in the study "KLTS: A Rigorous Method to Compute the Confidence Intervals for the Three-Cornered Hat and for Groslambert Covariance," published in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, (vol. 66, no. 12, pp. 1942-1949, Dec. 2019, doi: 10.1109/TUFFC.2019.2931911)


10th to 12th April 2018

32nd European Frequency and Time Forum takes place in Torino. Uliss team contributes to a presentation entitled "Direct Measurement of Cryogenic Sapphire Oscillators with Tracking DDSs and Two-Sample Covariance".


10th to 13th July, 2017

EFTF-IFCS joint conference takes place in Besançon. Take advantage to come and see ULISS in situ. You can contact us now or meet us at the conference.


December, 2016

Uliss is now able to deliver a low power version of the CSO (see datasheet).


February, 2015

Uliss moved to the SYRTE laboratory (SYstèmes de Référence Temps Espace, Observatoire de Paris, Paris, France) for a two-month measurement campaign.

The technology

Since 2013, ULISS design and market high precision Time and Frequency solutions:

Specific low-noise frequency synthesis at your request. For more information please contact us.

Fibered transmission system for dissemination of our high stability signals. For more information please contact us.

About Us

ULISS is a brand of FEMTO Engineering. FEMTO Engineering is the center for technological development of FEMTO-ST Research Institute...