In the Integrated Photonics field, our research portfolio is dedicated to the development and application of photonics technology for metrology, for the detection of gas or bio-molecules and for the integration of optical processing circuits dedicated to interferometric signals. In biomolecule detections, integrated refractometric circuits with high sensitivity are developed based on long period gratings (S > 10 000nm/RIU). The molecular detection approach exploits the chemical properties of the functionalized coating used to bind to the specific biomolecules. In addition, to achieve a complete refractometric embedded system, research on integrated optical spectrometers is also undertaken. In interferometric signal processing, sharp edge filters are designed to allow frequency-to-amplitude conversion of interferometric signals. This integration provides high compactness, high resolution and better immunity to parasitic noises such as undesired temperature variation and mechanical vibration.