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Transmission of Ultrasonic Waves Via Optical Silica Glass Fiber Doped by 7.5% of TiO2 with the Use of Power Sandwich Transducer

Muc S., Gudra T.

Archives of Acoustics

2011

Vol. 36, No. 1

141-150

The possibility of acoustic wave propagation in optical waveguides creates new prospects for simultaneous transmission of laser beams and ultrasonic waves. Combined laser-ultrasonic technology could be useful in e.g. surgical treatment. The article presents the results of experimental studies of transmission of ultrasonic wave in optical fibres, the core of which is doped by 7.5% of TiO2, using a sandwichtype transducer. It also presents amplitude characteristics of an ultrasonic signal propagated in the optical fibre. Authors studied the effect which the length of the fibre has on the achieved output signal amplitudes. They presented the relation of the output signal amplitude from a capacitive sensor to the power applied to the sandwich-type transducer. The obtained results were compared with the results produced when using an optical fibre with a core doped by 3% of GeO2, in order to select optical fibre suitable for simultaneous transmission of ultrasonic waves and laser rays.

Transmission of Ultrasonic Waves in Optical Fibers with the use of Sandwich Type Transducer

Muc S.

Archives of Acoustics

2009

Vol. 34, No. 4

735-745

Optical fibers are commonly used to transmit laser beams. The possibility of acoustic wave propagation in optical waveguides creates new prospects for simultaneous transmission of laser beams and ultrasonic waves. This combined technology could be useful in e.g. surgical treatment. A comparative analysis of both systems shows that combining the advantages of ultrasounds and laser light in one device, makes it possible to compensate for the faults of each of the technologies and to improve the effectiveness of surgical operations. The article presents the results of experimental studies of transmission of ultrasonic wave in optical fibers using a sandwich-type ultrasonic power transducer. It also presents amplitude characteristics of an ultrasonic signal propagated in an optical fiber. The effect of the length of the fiber on the achieved output signal amplitudes was studied. The relation of the output signal of a capacitive sensor to the power applied to the sandwich-type transducer was presented. The reflected power during ultrasonic wave propagation in an optical fiber was also measured. The measurements of the ultrasonic wave transmission were performed for single-mode and multi-mode step-index optical fibers.

Experimental study of transmission of ultrasonic wave in optical fibers

Muc S.

Archives of Acoustics

2008

Vol. 33, No. 4

619-625

Optical waveguides are commonly used to transmit electromagnetic radiation. The possibility of acoustic wave propagation in optical waveguides creates new prospects for simultaneous transmission of laser beam and ultrasonic wave. The measurements of the transmission of ultrasound in optical waveguides were performed for three representative types of optical fiber: a multimode step refractive index, a single-mode step refractive index and a multimode graded refractive index. Amplitude characteristics of signal propagated in optical waveguides of the three types of optical waveguides are given in this paper. The frequencies, for which amplitude maxima were obtained, overlapped resonant frequencies of a thick vibrating piezoelectric disk, which was the source of the ultrasonic waves.