Thermally robust and highly stable method for splicing silica glass fiber to crystalline sapphire fiber

This research reports an advancement in splicing silica glass fiber to sapphire single-crystal optical fiber (SCF) using a specialized glass processing device, including data that demonstrate the thermal stability of the splice to 1000°C. A filament heating process was used to produce a robust splic...

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Bibliographic Details
Published in:Applied optics (2004) 2023-02, Vol.62 (5), p.1392
Main Authors: Mumtaz, Farhan, Alla, Dinesh Reddy, Roman, Muhammad, Zhang, Bohong, Smith, Jeffrey D, Gerald, Rex E, O'Malley, Ronald J, Huang, Jie
Format: Article
Language:English
Subjects:
Attenuation
Bragg gratings
Extreme environments
FBG
fiber optics
Glass fibers
High temperature
high temperature sensors
MATERIALS SCIENCE
Optical fibers
Robustness
Sapphire
sapphire fiber
Silica glass
Single crystals
Splicing
steel manufacture
Thermal stability
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Summary:This research reports an advancement in splicing silica glass fiber to sapphire single-crystal optical fiber (SCF) using a specialized glass processing device, including data that demonstrate the thermal stability of the splice to 1000°C. A filament heating process was used to produce a robust splice between the dissimilar fibers. A femtosecond laser is used to inscribe a fiber Bragg gratings sensor into the SCF to measure the high-temperature capabilities and signal attenuation characteristics of the splice joint. The experimental results demonstrate that the proposed splicing method produces a splice joint that is robust, stable, repeatable, and withstands temperatures up to 1000°C with a low attenuation of 0.5 dB. The proposed method allows placement of SCF-based sensors in the extreme environments encountered in various engineering fields, such as nuclear, chemical, aviation, and metals manufacturing, to enable improvements in process monitoring, product quality, and production efficiency.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.479732