Zobrazeno 1 - 10
of 301
pro vyhledávání: '"Rubiola, Enrico"'
Phase noise of a microwave photonic channel: direct-current versus external electro-optic modulation
We characterize the phase noise of a microwave photonic channel, where a 10 GHz signal is carried by an intensity-modulated light beam over a short optical fiber, and detected. Two options are compared, (i) an electro-optic modulator (EOM), and (ii)
Externí odkaz:
http://arxiv.org/abs/2311.11295
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
Autor:
Fluhr, Christophe, Dubois, Benoît, Tetu, Guillaume Le, Soumann, Valerie, Paris, Julien, Rubiola, Enrico, Giordano, Vincent
The cryogenic sapphire oscillator (CSO) is a highly specialized machine, which delivers a reference signal exhibiting the lowest frequency fluctuations. For the best units, the Allan deviation (ADEV) is <1e-15 for integration time between 1 and 10,00
Externí odkaz:
http://arxiv.org/abs/2210.05545
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