Reel-to-Reel Fabrication of In-Fiber Low-Loss and High-Temperature Stable Rayleigh Scattering Centers for Distributed Sensing
| Autor: | Mohan Wang, Kehao Zhao, Sheng Huang, Jingyu Wu, Ping Lu, Paul R. Ohodnicki, Ming-Jun Li, Stephen J. Mihailov, Kevin P Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Optical fiber
Materials science Fabrication ultrafast optics optical fiber sensors business.industry Physics::Optics law.invention Core (optical fiber) symbols.namesake law Fiber laser Femtosecond symbols Optoelectronics Fiber micromachining Electrical and Electronic Engineering Rayleigh scattering business Reflectometry Instrumentation temperature measurement |
| Zdroj: | IEEE Sensors Journal. 20:11335-11341 |
| ISSN: | 2379-9153 1530-437X |
| Popis: | This paper presents a method of reel-to-reel femtosecond laser direct writing that enables the continuous inscription of low-loss and high-temperature stable Rayleigh scattering centers inside the core of single-mode optical fibers for distributed temperature sensing up to 1000°C. By examining the correlation between the Rayleigh backscattering profile and the cross-section morphology of femtosecond laser-induced nanograting in fiber cores, this paper reveals the mechanisms that underlie the fabrication of high-temperature stable distributed fiber sensors with low loss. By fine-tuning laser exposure conditions, the femtosecond laser-fabricated Rayleigh scattering enhanced section could achieve an optimized propagation loss of 0.01 dB/cm with an increased signal-to-noise ratio of over 35 dB for meters of lengths. Long-term high-temperature stability of the Rayleigh scattering enhanced section was successfully demonstrated, with improved thermal stability and signal-to-noise ratio. The fabrication method presented here provides a promising technique to improve the performance of Optical Frequency-Domain Reflectometry based distributed sensing for harsh environment applications. |
| Databáze: | OpenAIRE |
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