A novel distributed strain sensor is presented utilizing the strain dependence of the frequency at which the Brillouin loss is maximized in the interaction between a cw laser and a pulsed laser. A strain resolution of 20 µ with a spatial resolution of 5 m has been achieved with a 22 km sensing length.
- distributed strain sensor
- strain dependence
- Brillouin loss
Bao, X., Webb, D. J., & Jackson, D. A. (1994). 22km distributed strain sensor using Brillouin loss in an optical fibre. Optics Communications, 104(4/6), 298-302. https://doi.org/10.1016/0030-4018(94)90559-2