Integrated optics design concepts applied to high frequency ultrasound detection

Shai Ashkenazi, Matthew O'Donnell, L. Jay Guo, Chung Yen Chao

Research output: Contribution to journalConference articlepeer-review


A novel application of polymer waveguide microring resonator for high-frequency ultrasound detection is presented. The device consists of a microring optical resonator that is coupled to a straight optical waveguide which serves as both input and output ports. Acoustic waves irradiating the ring waveguide induce strain that causes a change in the effective refractive index of optical waves propagating along the ring. The sharp wavelength dependence of the high Q-factor resonator enhances the optical response to the acoustic strain. High sensitivity has been demonstrated experimentally in the detection of broadband ultrasound pulses from a 10MHz transducer. WDM methods are proposed to extend the technique into an array of microrings for ultrasound imaging applications.

Original languageEnglish (US)
Article number49
Pages (from-to)301-306
Number of pages6
JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
StatePublished - 2005
EventSixth Conference on Biomedical Thermosacoustics, Optoacoustics, and Acousto-Optics - Photons Plus Ultrasound: Imaging and Sensing 2005 - San Jose, CA, United States
Duration: Jan 23 2005Jan 25 2005


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