A5027040181- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Advanced Fiber Laser Technologies
- Scientific Measurement and Uncertainty Evaluation
- Cold Atom Physics and Bose-Einstein Condensates
- Cardiovascular Syncope and Autonomic Disorders
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Quantum optics and atomic interactions
- Analytical chemistry methods development
- Glaucoma and retinal disorders
- Solid State Laser Technologies
- Mass Spectrometry Techniques and Applications
- Semiconductor Lasers and Optical Devices
- Laser Material Processing Techniques
Istituto Nazionale di Ricerca Metrologica
2021-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2017
Institute of Scientific and Technical Research for Defense
2017
The dissemination of atomic clocks with fiber-based techniques finds application in the fields metrology, fundamental physics, navigation, and spectroscopy but is a challenge terms reliability, maintenance, performance. Here, we describe realization 1023-km-long fiber link between metrological institutes Italy France that shares infrastructure Internet traffic exploits segmentation shorter, cascaded spans to fight optical losses exceeding 280 dB. With four months quasicontinuous operation...
An atomic time scale is a method for marking events and the passage of by using frequency standards. Thanks to superior performance clocks based on optical transitions, scales generated with have potential be more accurate stable than those microwave clocks. In this work, we demonstrate an experimental INRiM Yb lattice clock hydrogen maser as flywheel oscillator, showing sub-nanosecond accuracy over months-long periods nanosecond 1-year period. The obtained results show that competitive...
Abstract The recently concluded collaborative European project “Robust optical clocks for international timescales” (ROCIT) tackled some of the key challenges on roadmap towards a redefinition SI second. This paper gives an overview progress made improving robustness and automation verifying their uncertainty budgets through coordinated comparison campaigns. It also presents work incorporation into time scales, covering both use to steer local physical scales evaluations hydrogen masers...
We perform low phase noise, efficient serrodyne modulation for optical frequency control and spectral purity transfer between two ultrastable lasers. After characterizing efficiency its bandwidth, we estimate the noise induced by setup developing a novel, to best of our knowledge, composite self-heterodyne interferometer. Exploiting modulation, locked 698 nm laser superior source at 1156 means comb as oscillator. show that this technique is reliable tool standards.
Abstract We present the new absolute frequency measurement of ytterbium ( 171 Yb) obtained at INRiM with optical lattice clock IT-Yb1 against cryogenic caesium 133 Cs) fountain IT-CsF2, evaluated through a campaign that lasted 14 months. Measurements are performed by either using hydrogen maser as transfer oscillator or synthesizing low-noise microwave for Cs interrogation an comb. The Yb unperturbed transition <?CDATA ${^1}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The advent of optical frequency standards with ultimate uncertainties in the low $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}18}$ requires femtosecond combs to support a similar level resolution spectral transfer and computation ratios. related experimental challenges grow together number frequencies be measured simultaneously, as many cases comb's power does not allow reliable beatnote counting or tracking all regions interest. Here we describe use track-and-hold amplifier...
We report on the development of a new compact strontium optical lattice clock employing 2D-MOT as cold atomic source. The system reliability is currently studied using most abundant isotope, bosonic <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">88</sup> Sr. More than 10 xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> 88Sr atoms are loaded in at 813 nm temperatures few microKelvin. All needed frequencies stabilized to zero-CTE high finesse...
InfraRed Multi-Photon Dissociation (IRMPD) is a highly selective laser isotope separation technique.This process consists of sequential IR photon absorption from the ground vibrational state up to dissociation by molecule that contains interest.High threshold molecules require large intensity radiation fields.This drawback could be overcome two-frequency IRMPD.In this technique, low energy resonant with first levels guarantees isotopic selectivity excitation and second non-resonant achieves...
SummaryWe report the result of new absolute frequency measurement <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">171</sup> Yb performed at INRIM. The our optical lattice clock IT-Yb1 is measured against local cryogenic Cs fountain IT-CsF2 during a campaign that lasted 14 months. measurements were with two different techniques, i.e. using hydrogen maser as transfer oscillator or by synthesizing low-noise microwave for interrogation from...
The advent of optical frequency standards with ultimate uncertainties in the low 1x10$^{-18}$ requires femtosecond combs to support a similar level resolution spectral transfer and computation ratios. related experimental challenges grow together number frequencies be measured simultaneously, as many cases comb's power does not allow reliable beatnote counting or tracking all regions interest. Here we describe use track-and-hold amplifier implement gated detection, previously proposed...
We present the new absolute frequency measurement of ytterbium (171Yb) obtained at INRiM with optical lattice clock IT-Yb1 against cryogenic caesium (133Cs) fountain IT-CsF2, evaluated through a campaign that lasted 14 months. Measurements are performed by either using hydrogen maser as transfer oscillator or synthesizing low-noise microwave for Cs interrogation an comb. The 171Yb unperturbed transition 1S0 - 3P0 results to be 518 295 836 590 863.44(14) Hz, total fractional uncertainty...