Optical characterisation of the whispering gallery modes in Nd3+ doped glass active microspheres

Projecte final de mèster oficial realitzat en col.laboració amb Universitat Autònoma de Barcelona (UAB), Universitat de Barcelona (UB) i Institut de Ciències Fotòniques (ICFO)English: The project was focused on the optical characterization of Nd3+ doped glass active microspheres of sizes of few micrometers. Using micro photoluminescence (time resolved and continuous wave) and micro transmission experimental techniques we characterized single microspheres in terms of the quality factor, free spectral range, finesse and Purcell factor. On the basis of the quantification of those magnitudes, we discuss the influence that the cavity induces on the optical properties of the Nd3+ ions and vice versa