High-definition strain sensing based on the Rayleigh backscatter delivers a virtually continuous line of strain measurements with sub-millimeter spatial resolution, employing very small lightweight optical fiber sensors that can be easily embedded or installed in challenging. High-definition strain sensing based on the Rayleigh backscatter delivers a virtually continuous line of strain measurements with sub-millimeter spatial resolution, employing very small lightweight optical fiber sensors that can be easily embedded or installed in challenging. Distributed fiber optic (DFO) sensing, characterized by a long sensing distance, easy implantation, long-term stability, and high accuracy, is widely used in the field monitoring of engineering structures [2, 3, 4], geotechnical engineering [5, 6, 7, 8], and the geo-environment [9, 10, 11, 12. Luna's fiber optic sensing solutions deliver strain measurements that go beyond what's possible with traditional strain gages. Three types of fiber optic strain sensors offer a wide range of strain measurement capabilities without sacrificing precision and sensitivity. However, the impact of the monitored structure's strain distribution on the strain transfer mechanism in DFO sensors has often been.