This project aims to develop Opto-Acoustical based sensor that provide feedback during laser surgery. This feedback mechanism will help the surgeon to specifically determine the tissue that being cut and stop the laser when the all desired tissue have been removed. In this way, it will provide high specificity in laser cutting which can prevent cutting important and critical tissues. To develop this sensor, we will investigate the best way possible to measure properties of tissue that being cut by using Opto-Acoustical means. we will design and build the Opto-Acoustical system and integrate it into an endoscopic/fiberscopic laser surgery system. The method will be based on measuring the shock wave generated from laser ablation process which will be merely depend on tissue properties (eq. Mechanical properties). (Herve Nguendon Kenhagho)