Automatic diameter control system applied to the laser heated pedestal growth technique

AUTOR(ES)

Andreeta, M.R.B., Caraschi, L.C., Hernandes, A.C.

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2003-01

RESUMO

We described an automatic diameter control system (ADC), for the laser heated pedestal growth technique, that reduces the diameter fluctuations in oxide fibers grown from unreacted and non-sinterized pedestals, to less than 2% of the average fiber diameter, and diminishes the average diameter fluctuation, over the entire length of the fiber, to less than 1%. The ADC apparatus is based on an artificial vision system that controls the pulling speed and the height of the molten zone within a precision of 30 mum. We also show that this system can be used for periodic in situ axial doping the fiber. Pure and Cr3+ doped LaAlO3 and pure LiNbO3 were usedas model materials.

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