The Possibility of a Simultaneous Transmission οf Ultrasound and Laser Radiation via Flexible Optical Silica Glass Fibre
S. Muc, T. Gudra and E. Beres Pawlik
Institute of Telecommunications, Teleinformatics and Acoustics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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Glass optical fibres are a promising medium for simultaneous laser ultrasonic applications. The proposed application system is based on simultaneous transmission of laser radiation and ultrasounds in a flexible silica glass fibre. The optical fibre's core was made of SiO2 (97%) and GeO2 (3%) and the cladding was 100% SiO2. The material the optical fibre is made of enables simultaneous transmission of laser radiation and ultrasonic wave. Experiments were performed using a Mach-Zehnder optical waveguide interferometer with single mode optical fibre coupler. This paper presents measurement results for delivering ultrasonic waves to the optical fibre using longitudinal vibrations generated by a sandwich ultrasonic transducer with a velocity transformer. The study presents the relations concerning simultaneous operation of both types of waves and the possibilities of transmission of low frequency, high power ultrasonic wave in optical fibres using a sandwich type transducer.
DOI: 10.12693/APhysPolA.116.359
PACS numbers: 43.35.Yb, 42.81.Wg