Daniel Varela Magalhães

• Abstract

  The need for higher precision in time measurements drives more and more the development of new technologies for atomic clocks. Following this trend, the control of such clocks must be precisely adjusted to take the minimal time possible and not to accumulate delays. Bringing together real-time processing and versatility on re-configurable hardware definitions, FPGA devices have been used …

  Feasibility analysis of the use of FPGAs for the implementation of Finite State Machines in atomic clock control context, BP.IC

• Abstract

  Diode lasers have a lower cost and a lower operating complexity when compared to other types of lasers. However, its intrinsic characteristics make a control system with optical-electronic feedback necessary for the emitted radiation to have a stable wavelength and a narrow enough linewidth to enable its application. In addition to this, the control system used must allow adjustments in r…

  Development of a diode laser controller with an embedded processor: sub-system to contribute to the development of a compact atomic frequency standard, BP.IC

• Abstract

  Ultracold atomic clouds driven by laser beams are ideally suited for the realization of quantum systems with unsurmounted purity. Their high degree of controlability, the possibility of shielding from perturbative interactions with the environment, the availability of resonances with extremely high Q-factors, and last not least, the miniaturizability are all good reasons for their use in …

  Development of an optical standard based on an intercombination transition of strontium, BP.PD

(Only some records are available in English at this moment)

• Abstract

  The project has as general objective the development of high precision frequency standards, one of the core activities of LNE-SYRTE. This work will be shared between two experiments: The atomic fountain FO2 and the neutral mercury optical clock (Hg clock). Both systems have great importance to the growing of our group in the scientific metrology of time and frequency area, either in the m…

  High performance frequency standards, BE.PQ