An Optoelectronic Integrated Ultrasound Sensor for Intravascular Pressure Detection Using Ring Resonators

摘要

An optomechatronic system based on one-dimensional ultrasound detector array for intravascular pressure measurement is presented. The proposed structure is based on optical linear ring resonators array. The applied pressure on ring resonator will change the physical parameters such as effective cross section of the ring and finally the effective index of refraction. The transmitted intensity changes and the measured output power could be used for measuring the pressure. Also, for rejection of common errors after photodetectors blocks, differential amplifiers can be utilized. For incident light coupling to the rings, the integrated 3-dB couplers are used. The effect of pressure on single ring is simulated and the effects of coupling coefficient, coupler loss and ring resonator diameter are investigated. This structure easily can be extended to two-dimensional cases. So, the proposed structure can be used for intravascular imaging including low noise and high integration and precision.