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Proceedings Paper

Laser heated pedestal growth system commissioning and fiber processing
Author(s): Michael Buric; M. J. Yip; Ben Chorpening; Paul Ohodnicki
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Paper Abstract

A new Laser Heated Pedestal Growth system was designed and fabricated using various aspects of effective legacy designs for the growth of single-crystal high-temperature-compatible optical fibers. The system is heated by a 100-watt, DC driven, CO2 laser with PID power control. Fiber diameter measurements are performed using a telecentric video system which identifies the molten zone and utilizes edge detection algorithms to report fiber-diameter. Beam shaping components include a beam telescope; along with gold-coated reflaxicon, turning, and parabolic focusing mirrors consistent with similar previous systems. The optical system permits melting of sapphire-feedstock up to 1.5mm in diameter for growth. Details regarding operational characteristics are reviewed and properties of single-crystal sapphire fibers produced by the system are evaluated. Aspects of the control algorithm efficacy will be discussed, along with relevant alternatives. Finally, some new techniques for in-situ processing making use of the laser-heating system are discussed. Ex-situ fiber modification and processing are also examined for improvements in fiber properties.

Paper Details

Date Published: 12 May 2016
PDF: 9 pages
Proc. SPIE 9852, Fiber Optic Sensors and Applications XIII, 985219 (12 May 2016); doi: 10.1117/12.2224480
Show Author Affiliations
Michael Buric, National Energy Technology Lab. (United States)
M. J. Yip, National Energy Technology Lab. (United States)
Ben Chorpening, National Energy Technology Lab. (United States)
Paul Ohodnicki, National Energy Technology Lab. (United States)

Published in SPIE Proceedings Vol. 9852:
Fiber Optic Sensors and Applications XIII
Eric Udd; Gary Pickrell; Henry H. Du, Editor(s)

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