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Title: High-temperature effects on the light transmission through sapphire optical fiber

Journal Article · · Journal of the American Ceramic Society
DOI:https://doi.org/10.1111/jace.15515· OSTI ID:1429184

Single crystal sapphire optical fiber was tested at high temperatures (1500°C) to determine its suitability for optical instrumentation in high-temperature environments. Broadband light transmission (450-2300 nm) through sapphire fiber was measured as a function of temperature as a test of the fiber's ability to survive and operate in high-temperature environments. Upon heating sapphire fiber to 1400°C, large amounts of light attenuation were measured across the entire range of light wavelengths that were tested. SEM and TEM images of the heated sapphire fiber indicated that a layer had formed at the surface of the fiber, most likely due to a chemical change at high temperatures. The microscopy results suggest that the surface layer may be in the form of aluminum hydroxide. Subsequent tests of sapphire fiber in an inert atmosphere showed minimal light attenuation at high temperatures along with the elimination of any surface layers on the fiber, indicating that the air atmosphere is indeed responsible for the increased attenuation and surface layer formation at high temperatures.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1429184
Alternate ID(s):
OSTI ID: 1426309
Journal Information:
Journal of the American Ceramic Society, Vol. 101, Issue 8; ISSN 0002-7820
Publisher:
American Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

References (12)

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Performance stability of the sapphire fiber and cladding under high temperature conference December 1999
In Situ Gamma Radiation-Induced Attenuation in Sapphire Optical Fibers Heated to 1000°C journal July 2014
Optical properties of sapphire fiber under high temperature conference September 2002
In-Situ Reactor Radiation-Induced Attenuation in Sapphire Optical Fibers journal September 2014
Devitrification in annealed optical fiber journal May 1997
In Situ Thermally Induced Attenuation in Sapphire Optical Fibers Heated to 1400°C journal October 2014
Optical and Infrared Properties of Al_2O_3 at Elevated Temperatures* journal January 1965
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Scattering effects in crystalline infrared fibers journal January 1988

Cited By (4)

Embedded metallized optical fibers for high temperature applications journal April 2019
High-temperature strain monitoring of stainless steel using fiber optics embedded in ultrasonically consolidated nickel layers journal July 2019
Tailoring the nanostructure of anodic aluminum oxide cladding on optical fiber journal June 2018
Nanostructured sapphire optical fiber embedded with Au nanorods for high-temperature plasmonics in harsh environments journal January 2019

Figures / Tables (5)


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