At the LAAS-CNRS, research on microcavity devices has been carried out in the Photonics team since 1990 and has focused on 850nm GaAs-based VCSELs since 1996. Fabrication and optimization of the properties of oxide-confined single-mode VCSELs as well as dual-function (emission/photodetection) VCSELs have been extensively studied in the team these last years. The main research axis is the integration of the optical functionalities within the VCSEL structures for emerging applications. Recently, the team has been involved into three European projects (Optonanogen, FunFACS, EMRP) and several ANR projects within which original III-V technological approaches have been proposed and implemented. The LAAS technological platform is part of the national RENATECH network. These pooled facilities allow integration of new devices for energy management, telecommunications, chemistry and biology, the development of specific technology to the production of demonstrators on the basis of flexible chains.