Photonic integrated sensors traditionally detect changes either in optical amplitude or phase. Here we experimentally demonstrate a sensing architecture which measures both amplitude and phase, enabling simultaneous detection of changes in absorption and refractive index.This work has received funding from the Ministerio de Ciencia, Innovación y Universidades (FPU19/03330, PID2019-106747RB-I00) and the Junta de Andalucía (Agencia Andaluza del Conocimiento PY18-793). We would also like to acknowledge the Universidad de Málaga, Campus de Excelencia Internacional Andalucía Tech
