Abstract
This Letter reports the performance of femtosecond (fs) laser-written distributed fiber Bragg gratings (FBGs) under high-temperature conditions up to 1600°C and explores the impact of rapid heat treatment on signal-to-noise ratio (SNR) enhancement. FBGs are essential for reliable optical sensing in extreme temperature environments. Comprehensive tests demonstrate the remarkable performance and resilience of FBGs at temperatures up to 1600°C, confirming their suitability for deployment in such conditions. The study also reveals significant fringe visibility improvements of up to ∼10 dB on a 1-m-long sapphire optical fiber through rapid heat treatment, representing a first-time achievement to the best of our knowledge. These enhancements are vital for improving the SNR and overall performance of optical fiber systems in extreme temperatures. Furthermore, the research attains long-term stability for the cascaded FBGs over a 24-hr period at 1600°C. This research expands our understanding of the FBG behavior in high-temperature environments and opens avenues for developing robust optical fiber systems for energy, aerospace, oil and gas, and high-temperature distributed sensing applications.
Recommended Citation
Mumtaz, Farhan; Tekle, Hanok; Zhang, Bohong; Smith, Jeffrey D.; O'Malley, Ronald J.; Gerald, Rex; and Huang, Jie, "Boosting SNR of cascaded FBGs in a sapphire fiber through a rapid heat treatment" (2023). PSMRC Faculty Research. 36.
https://scholarsmine.mst.edu/psmrc_facwork/36
Department(s)
Electrical and Computer Engineering
Second Department
Materials Science and Engineering
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Optica Publishing Group, All Rights Reserved
Publication Date
24 October 2023
