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Method for controlling fiber growth in a laser heated pedestal growth system by controlling a laser power output, a pedestal feedstock rate of motion, and a draw rate

Patent ·
OSTI ID:1893004
;
One or more embodiments relate to a method for controlling fiber growth and fiber diameter in a laser heated pedestal growth (LHPG) system so as to provide long, continuous single-crystal optical fibers of uniform diameter. The method generally provides three independent parameter feedback controls to control the molten zone height, laser power, and fiber drawing rates simultaneously in order to reduce the mismatch between instantaneous diameter changes and current diameter. The method permits the growth of fibers with non-uniform diameters along the fiber's length. The method also provides the capability to stop the LHPG system, remove the exhausted pedestal feedstock with a second pedestal feedstock, and restart the LHPG system to provide a continuous fiber.
Research Organization:
US Dept. of Energy (USDOE), Washington, DC (United States)
Sponsoring Organization:
USDOE
Assignee:
The United States of America as represented by the Secretary of the Air Force (Washington, DC)
Patent Number(s):
11,352,712
Application Number:
16/368,425
OSTI ID:
1893004
Country of Publication:
United States
Language:
English

References (16)

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Laser heated pedestal growth system commissioning and fiber processing conference May 2016
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Improved laser-heated pedestal growth system for crystal growth in medium and high isostatic pressure environment journal December 1999

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