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Title: 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

Abstract

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.

Inventors:
;
Issue Date:
Research Org.:
US Dept. of Energy (USDOE), Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1893004
Patent Number(s):
11352712
Application Number:
16/368,425
Assignee:
The United States of America as represented by the Secretary of the Air Force (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C30 - CRYSTAL GROWTH C30B - SINGLE-CRYSTAL-GROWTH
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
Resource Type:
Patent
Resource Relation:
Patent File Date: 03/28/2019
Country of Publication:
United States
Language:
English

Citation Formats

Buric, Michael P., and Liu, Bo. 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. United States: N. p., 2022. Web.
Buric, Michael P., & Liu, Bo. 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. United States.
Buric, Michael P., and Liu, Bo. Tue . "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". United States. https://www.osti.gov/servlets/purl/1893004.
@article{osti_1893004,
title = {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},
author = {Buric, Michael P. and Liu, Bo},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2022},
month = {6}
}

Works referenced in this record:

Novel implementation of laser heated pedestal growth for the rapid drawing of sapphire fibers
journal, December 1994


Fabrication and optical properties of single-crystal YAG fiber optics
conference, February 2012


Optical properties of single-crystal sapphire fibers
journal, January 1997


Optical properties and long-term stability of unclad single crystal sapphire fiber in harsh environments
conference, February 2019


Simulation and experiment on laser-heated pedestal growth of chromium-doped yttrium aluminum garnet single-crystal fiber
journal, March 2011


Growth and spectroscopic properties of Ti-doped sapphire single-crystal fibers
journal, September 2015


Apparatuses and Methods for Producing thin Crystals Fibers Using Laser Heating Pedestal Growth
patent-application, February 2018


Single-crystal fiber optics: a review
conference, February 2014


Modified single crystal fibers for distributed sensing applications
conference, April 2017


Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth
journal, January 2017


Highly efficient waveguided laser performance of diode pumped unclad Yb:YAG crystalline fibre
journal, May 2016


Growing crystalline sapphire fibers by laser heated pedestal techiques
patent, March 1997


Single-crystal fiber structures for harsh environment applications (Rising Researcher Presentation)
conference, May 2018


Automatic diameter control system applied to the laser heated pedestal growth technique
journal, January 2003


Improved laser-heated pedestal growth system for crystal growth in medium and high isostatic pressure environment
journal, December 1999


Device and method for the determination of diameters of crystals
patent-application, November 2001


Laser heated pedestal growth system commissioning and fiber processing
conference, May 2016


Laser‐heated miniature pedestal growth apparatus for single‐crystal optical fibers
journal, November 1984