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A new single-mode optical fiber with two Brillouin gain peaks is designed and fabricated to increase the differences in the temperature and strain coefficients between the peaks. The gains of the two Brillouin peaks are at a similar level and the temperature coefficient difference is ~0.2 MHz/°C. The fiber is well suited for simultaneous temperature and strain measurement with reduced uncertainties in Brillouin distributed fiber sensing applications.
Xiaoguang Sun,Ping Lu,Kyle Bedard,Jie Li, andRobert S. Dyer
"A new dual-Brillouin-peak optical fiber for simultaneous distributed strain and temperature measurement", Proc. SPIE 12532, Optical Waveguide and Laser Sensors II, 1253207 (13 June 2023); https://doi.org/10.1117/12.2663628
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Xiaoguang Sun, Ping Lu, Kyle Bedard, Jie Li, Robert S. Dyer, "A new dual-Brillouin-peak optical fiber for simultaneous distributed strain and temperature measurement," Proc. SPIE 12532, Optical Waveguide and Laser Sensors II, 1253207 (13 June 2023); https://doi.org/10.1117/12.2663628