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Accession number;99A0938071
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| Title;A study of measurements of acoustic properties of glasses by the ultrasonic waves in the VHF range. |
| Author;
WEI T-C
(Tohoku Univ.)
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Journal Title;Record of Electrical and Communication Engineering Conversazione, Tohoku University
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Journal Code:F0511A
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ISSN:0385-7719
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VOL.68;NO.1;PAGE.24-27(1999)
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| Figure&Table&Reference;FIG.3 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;In this paper, the properties analysis of glasses and optical fiber preforms, and the characterizations of their fabrication processes have been carried out using ultrasonic waves in the VHF range. It has been shown that the ultrasonic waves in the VHF range are very useful in the characterizations of glass materials for their significant frequency dependences of attenuation and velocity. It has also been shown that the impurities such as OH, Cl etc. with ppm order which are incorporated into glasses in their fabrication process, and the inhomogeneous distributions of dopants can be detected obviously with ultrasonic method. (author abst.) |
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