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

Materials Research

M.r.b. Andreeta¹  L.c. Caraschi¹  A.c. Hernandes¹ 

[1] ,Universidade de São Paulo Instituto de Física de São Carlos São Carlos SP ,Brazil

关键词: LHPG;    single crystal fiber;    diameter control;    crystal growth;   

DOI  :  10.1590/S1516-14392003000100019

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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