Bottom-up fabrication of lasers via epitaxial growth has been emerging as a promising alternative to the conventional top-down fabrication methods, due to its potential to realise micro-lasers with ultra-low losses. In this project, we aim to demonstrate electrically-injected lasing in InP/InAsP multi-quantum well micro-ring cavities that are grown by the selective area epitaxy technique. These on-chip micro-cavity lasers have a wide range of potential applications, ranging from telecommunication and sensing devices to light sources in next-generation photonic integrated circuits.