Direct laser writing of polymer micro-ring resonator ultrasonic sensors

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

With the development of photoacoustic technology in recent years, ultrasound-related sensors play a vital role in a number of areas ranging from scientific research to nondestructive testing. Compared with the traditional PZT transducer as ultrasonic sensors, novel ultrasonic sensors based on optical methods such as micro-ring resonators have gained increasing attention. The total internal reflection of the light along the cavity results in light propagating in microcavities as whispering gallery modes (WGMs), which are extremely sensitive to change in the radius and refractive index of the cavity induced by ultrasound strain field. In this work, we present a polymer optical micro-ring resonator based ultrasonic sensor fabricated by direct laser writing optical lithography. The design consists of a single micro-ring and a straight tapered waveguide that can be directly coupled by single mode fibers (SMFs). The design and fabrication of the printed polymer resonator have been optimized to provide broad bandwidth and high optical quality factor to ensure high detection sensitivity. The experiments demonstrate the potential of the polymer micro-ring resonator to works as a high-performance ultrasonic sensor.

Original languageEnglish (US)
Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017
EditorsJerome P. Lynch
PublisherSPIE
Volume10168
ISBN (Electronic)9781510608214
DOIs
StatePublished - Jan 1 2017
EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017 - Portland, United States
Duration: Mar 26 2017Mar 29 2017

Other

OtherSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017
Country/TerritoryUnited States
CityPortland
Period3/26/173/29/17

Keywords

  • Polymer micro-ring resonator
  • direct laser writing
  • fiber ring laser
  • integrated sensor
  • ultrasonic sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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