Optoelectric characteristics of laser remote sensing for measurement of ground vibration

Abstract

Airborne laser remote sensing is extensively used in geophysical explorations. Laser-remote-sensing studies are often undertaken to predict the availability of mineral resources in a target area. A major issue encountered in such studies concerns the acquisition of the ground-vibration information and analysis of the optoelectric characteristics of the corresponding target vibration. Our paper presents a scheme involving the use of a laser remote sensing system (LRSS) to realize the geophone-detection function and experimentally verify the optoelectric characteristics of the target ground vibration. As observed, the proposed LRSS demonstrates a 19- to 98-V s / cm sensitivity range for the low- to medium-frequency vibrations in the 0- to 600-Hz range. Overall, the LRSS could sense a wide range (0 to 4 kHz) of ground-vibration frequencies. Our research is expected to open avenues for electro-optical sensing technologies to be used in applications such as hidden-structure detection and non-line-of-sight imaging.