Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Vernotte, François"'
Autor:
Fluhr, Christophe, Dubois, Benoit, Calosso, Claudio E., Vernotte, Francois, Rubiola, Enrico, Giordano, Vincent
We report in this letter the outstanding frequency stability performances of an autonomous cryogenique sapphire oscillator presenting a flicker frequency noise floor below 2e-16 near 1,000 s of integration time and a long term Allan Deviation (ADEV)
Externí odkaz:
http://arxiv.org/abs/2210.06059
This article addresses the measurement of the power spectrum of red noise processes at the lowest frequencies, where the minimum acquisition time is so long that it is impossible to average on a sequence of data record. Therefore, averaging is possib
Externí odkaz:
http://arxiv.org/abs/2202.13969
Autor:
Rubiola, Enrico, Vernotte, Francois
Publikováno v:
IEEE Trans Microwave Theory Techniques, early access, February 2023, open access
Phase noise and frequency (in)stability both describe the fluctuation of stable periodic signals, from somewhat different standpoints. Frequency is unique compared to other domains of metrology, in that its fluctuations of interest span at least 14 o
Externí odkaz:
http://arxiv.org/abs/2201.07109
Publikováno v:
Monthly Notices of the Royal Astronomical Society 503(3) p.4496-4507, May 2021
Frequency metrology outperforms any other branch of metrology in accuracy (parts in $10^{-16}$) and small fluctuations ($<10^{-17}$). In turn, among celestial bodies, the rotation speed of millisecond pulsars (MSP) is by far the most stable ($<10^{-1
Externí odkaz:
http://arxiv.org/abs/2011.01912
This paper presents a very simple method ensuring the independence of consecutive spectra of the phase or frequency noise of an oscillator. This condition is essential for using cross-spectrum averages.
Comment: 8 pages, 5 figures
Comment: 8 pages, 5 figures
Externí odkaz:
http://arxiv.org/abs/2010.04473
Oscillator fluctuations are described as the phase or frequency noise spectrum, or in terms of a wavelet variance as a function of the measurement time. The spectrum is generally approximated by the `power law,' i.e., a Laurent polynomial with intege
Externí odkaz:
http://arxiv.org/abs/2005.13631
The cross-spectrum method consists in measuring a signal $c(t)$ simultaneously with two independent instruments. Each of these instruments contributes to the global noise by its intrinsec (white) noise, whereas the signal $c(t)$ that we want to chara
Externí odkaz:
http://arxiv.org/abs/2003.07118
Autor:
Lantz, Éric, Calosso, Claudio E., Rubiola, Enrico, Giordano, Vincent, Fluhr, Christophe, Dubois, Benoît, Vernotte, François
The three-cornered hat / Groslambert Covariance methods are widely used to estimate the stability of each individual clock in a set of three, but no method gives reliable confidence intervals for large integration times. We propose a new KLTS (Karhun
Externí odkaz:
http://arxiv.org/abs/1904.05849
Autor:
Vernotte, François, Lantz, Éric
The three-cornered hat method and the Groslambert Covariance are very often used to estimate the frequency stability of each individual oscillator in a set of three oscillators by comparing them in pairs. However, no rigorous method to assess the unc
Externí odkaz:
http://arxiv.org/abs/1810.01530
Autor:
Calosso, Claudio E., Vernotte, François, Giordano, Vincent, Dubois, Christophe Fluhr Benoît, Rubiolar, Enrico
This article shows the first measurement of three 100 MHz signals exhibiting fluctuations from 2E-16 to parts in 1E-15 for integration time tau between 1 s and 1 day. Such stable signals are provided by three Cryogenic Sapphire Oscillators (CSOs) ope
Externí odkaz:
http://arxiv.org/abs/1808.09843