The Possibility of a Simultaneous Transmission οf Ultrasound and Laser Radiation via Flexible Optical Silica Glass Fibre

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 $SiO_2$ (97%) and $GeO_2$ (3%) and the cladding was 100% $SiO_2$. 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

The Possibility of a Simultaneous Transmission οf Ultrasound and Laser Radiation via Flexible Optical Silica Glass Fibre

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 $SiO_2$ (97%) and $GeO_2$ (3%) and the cladding was 100% $SiO_2$. 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

Optical Fiber Sensors for Point Investigation οf Cancer Tissues

The paper presents optical fiber sensors for point investigation of cancer tissues. The construction of several sensors has been described, including selection of proper optical fiber as well as the construction of measuring head. Being part of medical endoscopes, presented sensors can be applied to investigate autofluorescence spectra in various tissue areas. The level of autofluorescence intensity indicates the stage of disease advancement. The paper presents the results of investigating autofluorescence spectra for different cancer tissues. Various areas of cancer tissues have been investigated in order to determine the level of disease advancement. In the paper new constructions of fluorescent fiber sensors are presented. The sensors were used to investigate human and animal normal and tumor tissues. The fiber sensors, possible to use in videoendoscopy, are very small. The comparative analysis of fluorescent spectra of normal and tumor tissues is presented