High-temperature enhanced Rayleigh scattering optical fiber sensor for borehole applications

Hongchao Wu; Kenneth S. Feder; Andrei A. Stolov; Scott D. Shenk; Eric M. Monberg; Debra A. Simoff

doi:10.1117/12.2538120

3 March 2020 High-temperature enhanced Rayleigh scattering optical fiber sensor for borehole applications

Hongchao Wu, Kenneth S. Feder, Andrei A. Stolov, Scott D. Shenk, Eric M. Monberg, Debra A. Simoff

Proceedings Volume 11276, Optical Components and Materials XVII; 112760Y (2020) https://doi.org/10.1117/12.2538120
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

This study presents a high-temperature distributed acoustic sensor (HT-DAS) optical fiber that utilizes a single layer of unique specialty coating with elevated thermal stability applied atop a 125 μm single-mode transmission fiber, where the fiber features enhanced Rayleigh backscattering sensitivity combined with long-term robustness and survivability up to 150 °. The developed HT-DAS fiber possesses a similar level of mechanical strength and transmission loss as most industrial specialty and telecommunication optical fibers, but also exhibits remarkable distributed sensing characteristics: enhanced elastic backscattering signal intensity about 12 dB above the base Rayleigh scattering level of non-enhanced fiber. Most importantly, this fiber extends service feasibility to a relatively high temperature regime for 1 year at about 150°C, according to life-time estimation based on thermogravimetric analysis, failure mode analysis, and accelerated aging reliability test.

Conference Presentation

Citation Download Citation

Hongchao Wu, Kenneth S. Feder, Andrei A. Stolov, Scott D. Shenk, Eric M. Monberg, and Debra A. Simoff "High-temperature enhanced Rayleigh scattering optical fiber sensor for borehole applications", Proc. SPIE 11276, Optical Components and Materials XVII, 112760Y (3 March 2020); https://doi.org/10.1117/12.2538120

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