Optically pumped magnetometers (OPMs) have gained attention in recent years for their medical application in magnetoencephalography(MEG), a neuro-imaging technique that maps brain activity by measuring the magnetic fields ...

This project explores the control of magnetic fields through active feedback, ultimately bringing the magnetic field noise level below the required threshold, for one single axis. An absolute stability of less than 400 uG ...

[ANGLÈS] A master clock (frequency reference) for experiments related to cold and trapped rubidium atoms was developed. From a telecommunication fibre laser source at 1560 nm, frequency-doubling was optimized to obtain an ...

In this master's thesis we study two filtering techniques, first the Faraday anomalous dispersion optical filter (FADOF) and second a monolithic Fabry-Pérot interferometer with the aim of filtering down-converted photon ...

This thesis is devoted to the study of quantum control of an ultracold atomic ensemble of $^{87}$Rb. Stroboscopic probing is used to achieve real-time tracking of the collective spin magnitude and orientation via non-destructive ...

Nowadays there is a considerable progress in optical magnetometry and spin noise spectroscopy, which use magnetically-sensitive atomic ensembles and optical read-out, approaching the limits set by quantum mechanics. In ...

The design of two locking systems for light sources desired to generate narrowband photon pairs is under study. First a DBR laser will be locked to the D1 transition frequency of Rb 87 using a Doppler-free Saturated ...

[ANGLÈS] We describe experimental results on a novel optical filter based on the FADOF (Faraday Anomalous Dispersion Optical Filter) principle, and its application to production of atom-resonant entangled photon pairs at ...