Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Mohammadreza, Gharavipour"'
Autor:
Mohammadreza Gharavipour, Christoph Affolderbach, Gaetano Mileti, Florian Gruet, William Moreno, Nil Almat, M. Pellaton
Publikováno v:
Quantum Electronics. 49:293-297
We numerically and experimentally evaluate the impact of the inhomogeneity of the microwave field in the cavity used to perform double-resonance (DR) Ramsey spectroscopy in a buffer gas alkali vapour cell. The Ramsey spectrum is numerically simulated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73b13800d4dd3dc271fea0a07223395b
https://doi.org/10.1070/qel16883
https://doi.org/10.1070/qel16883
Autor:
Nil, Almat, Mohammadreza, Gharavipour, William, Moreno, Florian, Gruet, Christoph, Affolderbach, Gaetano, Mileti
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 67(1)
Long-term frequency instabilities in vapor-cell clocks mainly arise from fluctuations of the experimental and environmental parameters that are converted to clock frequency fluctuations via various physical processes. Here, we discuss the frequency s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c03a0cb8f9ae1c7732eb979f4e5d847e
https://pubmed.ncbi.nlm.nih.gov/31514134
https://pubmed.ncbi.nlm.nih.gov/31514134
Publikováno v:
2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC).
We analyze the main effects that limit the frequency stability of a high-performance compact Rb vapor-cell atomic clock on medium- to long-term timescales up to one day, in view of identifying the fundamental clock stability limits. The clock is oper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2409b91771f1bec0a4a92adfa281ef04
https://doi.org/10.1109/fcs.2019.8856061
https://doi.org/10.1109/fcs.2019.8856061
Autor:
M. Pellaton, William Moreno, Nil Almat, Mohammadreza Gharavipour, Christoph Affolderbach, Gaetano Mileti
Publikováno v:
2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC).
We employ a three-level Bloch vector model to simulate Ramsey fringes of our Rb vapor-cell atomic clock. The residual inhomogeneity of the microwave magnetic field across the buffer-gas cell is a key ingredient for correctly modelling the behavior at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcfec5f84f1ae5d74a6e6db42fdcf992
https://doi.org/10.1109/fcs.2019.8856053
https://doi.org/10.1109/fcs.2019.8856053
Autor:
Dušan Arsenović, I. S. Radojičić, Bojan Zlatković, Mohammadreza Gharavipour, T. Khalifa, Aleksandar J. Krmpot, M. M. Ćurčić, B. M. Jelenković
Publikováno v:
Physical Review A. 97
We investigate both theoretically and experimentally four-wave mixing (FWM) in hot potassium vapor, generated by a copropagating pump and probe in an off-resonant double-$\mathrm{\ensuremath{\Lambda}}$ system, and present conditions when this atomic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54fd328683b3d221f31d929b6e7ce040
https://doi.org/10.1103/physreva.97.063851
https://doi.org/10.1103/physreva.97.063851
Autor:
William Moreno, M. Pellaton, Christoph Affolderbach, Florian Gruet, Gaetano Mileti, Mohammadreza Gharavipour, Nil Almat
Publikováno v:
2018 IEEE International Frequency Control Symposium (IFCS).
In this communication, we report on our recent investigations related to the development of a compact high performance laser-pumped vapor cell Rubidium atomic clock. These studies include the evaluation of alternative technologies for key components
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23bf1ab3708d8dc295ddbda6e277e9b0
https://doi.org/10.1109/fcs.2018.8597452
https://doi.org/10.1109/fcs.2018.8597452
Autor:
M. Pellaton, William Moreno, Nil Almat, Florian Gruet, Mohammadreza Gharavipour, Christoph Affolderbach, Gaetano Mileti
Publikováno v:
2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS).
We report on a narrow-linewidth diode laser source emitting at 780 nm, based on frequency doubling from 1.56 μm, which is frequency stabilized on the D2 transition line of Rubidium (Rb). This compact laser source shows a frequency stability of 2·10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d743160072b0332c106c07f35f583c5
https://doi.org/10.1109/fcs.2017.8088801
https://doi.org/10.1109/fcs.2017.8088801
Autor:
Florian Gruet, Mohammadreza Gharavipour, Aleksandar J. Krmpot, I. S. Radojičić, Christoph Affolderbach, B. M. Jelenković, Gaetano Mileti
Publikováno v:
2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFC).
We apply an innovative method called Optically-Detected Spin-Echo to measure the intrinsic coherence relaxation time in the buffer-gas vapor cell of a Rb atomic clock [1]. This method suppresses the influence of static-magnetic-field-gradients across
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0997b01baaa6b39eb6b760cb191355c
https://doi.org/10.1109/fcs.2017.8088799
https://doi.org/10.1109/fcs.2017.8088799
Publikováno v:
physica status solidi c. 9:492-495
Si doped AlxGa1-xN layers with x ranging from 0 to 45% have been grown by metal-organic vapour phase epitaxy in order to study their electrical properties. The Si doping concentration was varied over a wide range below and above the theoretically exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac8ddcb9dba8fb7b1573fa8313a89e33
https://doi.org/10.1002/pssc.201100481
https://doi.org/10.1002/pssc.201100481
Publikováno v:
Electronics Letters
In today's state of the art compact vapour-cell atomic clocks relying on the pulsed Ramsey-type interrogation, optical detection noise is a major limitation to the achievable short-term stability. In this communication, the influence of the optical d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::427df46e884e00e5f90cfcada8526434
http://doc.rero.ch/record/257534
http://doc.rero.ch/record/257534