HIGH FREQUENCY ULTRASOUND DETECTION USING POLYMER OPTICAL-RING RESONATOR

摘要

A polymer waveguide resonator device for high-frequency ultrasound detection having an optical resonator (12) coupled to a straight optical waveguide (14) which serves as input and output ports Acoustic waves irradiating the waveguide induce strain modifying the waveguide cross-section or other design property As a consequence, the effective refractive index of optical waves propagating alon the ring is modified The sharp wavelength dependence of the high Q-factor resonator enhances the optical response to acoustic strai High sensitivity is demonstrated experimentally in detecting broadband ultrasound pulses from a 10MHz transducer