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A. Host-Madsen
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Kwang Mong Sim
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R. S. Ramakrishna
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Hoyoung Yang, Won-Taek Han
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Observation of Azimuthal Cracking in the Core/Cladding Interface of the Fiber Preform during MCVD Process
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Hoyoung Yang, Won-Taek Han, "Observation of Azimuthal Cracking in the Core/Cladding Interface of the Fiber Preform during MCVD Process ,"
The 21th International Korea-Japan Seminar on Ceramics
, paper B15, pp. 257-261, 2004.
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 hyyang-ceramics.pdf (1.162MB)
  
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Acknowledgment
Keywords
Faraday effect, magneto-optic, thermal stress, crack, MCVD
Abstract
We observed cracks propagated in azimuthal direction, at the core/cladding interface of a fiber preform for magneto-optical application during MCVD process. Since the core of the preform contained large amount of terbium oxide and alumina, the crack formation and propagation was attributed to the thermal expansion mismatch between the core and cladding. The stress in the preform was theoretically calculated by using well-known thermal stress equations with the physical properties of the glass for the core and cladding and the result was found to be in good agreement with the observation in the aspect of azimuthal crack propagation.
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