Experimental Study of Simultanoeus Transmission of a Light Wave and an Ultrasonic Wave in an Optical Fiber with the Use of a Mach-Zehnder Interferometer

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Authors

  • Sylwia MUC Wrocław University of Technology, Institute of Telecomunications, Teleinformatics and Acoustics
  • Tadeusz GUDRA Wrocław University of Technology, Institute of Telecomunications, Teleinformatics and Acoustics
  • Elżbieta BEREŚ-PAWLIK Wrocław University of Technology, Institute of Telecomunications, Teleinformatics and Acoustics

Abstract

The possibility of acoustic wave propagation in optical waveguides creates new prospects for the simultaneous use of a light wave and an ultrasonic wave in, for instance, medicine for cutting biological tissues with a surgical ultrasonic laser knife. A Mach-Zehnder optical waveguide interferometer was used in the experimental studies of simultaneous transmission of those two wave types. If ultrasonic vibrations are delivered to one of the interferometer arms, a light modulation effect is produced. This paper presents measurement results for different methods of delivering ultrasonic waves to the optical fiber, i.e. using radial vibrations of a piezoelectric disk or longitudinal vibrations generated by a sandwich ultrasonic transducer with a velocity transformer.

Keywords:

laser-ultrasound transmission in optical fiber, Mach-Zehnder interferometer

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