title: An acousto-optic sensor based on resonance grating waveguide structure.
abstract: This paper presents an acousto-optic (AO) sensor based on resonance grating waveguide structure. The sensor is fabricated using elastic polymer materials to achieve a good sensitivity to ultrasound pressure waves. Ultrasound pressure waves modify the structural parameters of the sensor and result in the optical resonance shift of the sensor. This converts into a light intensity modulation. A commercial ultrasound transducer at 20 MHz is used to characterize a fabricated sensor and detection sensitivity at different optical source wavelength within a resonance spectrum is investigated. Practical use of the sensor at a fixed optical source wavelength is presented. Ultimately, the geometry of the planar sensor structure is suitable for two-dimensional, optical pressure imaging applications such as pressure wave detection and mapping, and ultrasound imaging.
authors.affiliation: Department of Electrical Engineering, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA, swseo@ccny.cuny.edu.
authors.forename: Antonio Jou
authors.initials: AJ
authors.lastname: Xie
authors.affiliation: Department of Electrical Engineering, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA, swseo@ccny.cuny.edu.
authors.forename: Fuchuan
authors.initials: F
authors.lastname: Song
authors.affiliation: Department of Electrical Engineering, The City College of New York, 160 Convent Avenue, New York, NY 10031, USA, swseo@ccny.cuny.edu.
authors.forename: Sang-Woo
authors.initials: SW
authors.lastname: Seo
keywords: acousto-optic; polymer sensor; resonance grating waveguide; ultrasound sensor