Simultaneous distributed Brillouin strain and temperature sensor with photonic crystal fiber

Lufan Zou; Xiaoyi Bao; Liang Chen

doi:10.1117/12.540177

27 July 2004 Simultaneous distributed Brillouin strain and temperature sensor with photonic crystal fiber

Lufan Zou, Xiaoyi Bao, Liang Chen

Proceedings Volume 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems; (2004) https://doi.org/10.1117/12.540177
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

The strain and temperature dependence of the Brillouin loss spectra using Brillouin frequencies in a photonic crystal fiber with a partially Ge-doped core are studied for the first time. The spectrum of the photonic crystal fiber displays a multi-peak structure due to waveguide and antiwaveguide types of sound propagation. Our experiments demonstrate that the Brillouin frequency shift v_B depends on strain and temperature of the photonic crystal fiber. For two main peaks that are attributed to the scattering from longitudinal acoustic waves in the Ge-doped center region and solid pure silica region of the core of the photonic crystal fiber, the strain coefficients are 0.048 and 09.055 MHz/με and temperature coefficients are 0.96 and 1.25 MHz/°C at wavelength of 1320 nm. Combining the measurements of the strain dependence of Brillouin frequency shift with measurements of the temperature dependence of Brillouin frequency shift, we demonstrate a simultaneosly distributed strain and temperature sensor with a spatial resolution of 15 cm, a temperature resolution of 1.3°C, and a strain resolution of 15με along a single photonic crystal fiber.

Citation Download Citation

Lufan Zou, Xiaoyi Bao, and Liang Chen "Simultaneous distributed Brillouin strain and temperature sensor with photonic crystal fiber", Proc. SPIE 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems, (27 July 2004); https://doi.org/10.1117/12.540177

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