Laser heated pedestal growth system commissioning and fiber processing

Michael Buric; M. J. Yip; Ben Chorpening; Paul Ohodnicki

doi:10.1117/12.2224480

12 May 2016 Laser heated pedestal growth system commissioning and fiber processing

Michael Buric, M. J. Yip, Ben Chorpening, Paul Ohodnicki

Proceedings Volume 9852, Fiber Optic Sensors and Applications XIII; 985219 (2016) https://doi.org/10.1117/12.2224480
Event: SPIE Commercial + Scientific Sensing and Imaging, 2016, Baltimore, MD, United States

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.

Citation Download Citation

Michael Buric, M. J. Yip, Ben Chorpening, and Paul Ohodnicki "Laser heated pedestal growth system commissioning and fiber processing", Proc. SPIE 9852, Fiber Optic Sensors and Applications XIII, 985219 (12 May 2016); https://doi.org/10.1117/12.2224480

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