Mapping Fiber Networks

A system for mapping an underground cable in a fiber network, comprising:

• a laser configured to inject pulses of light into a starting segment of a cable comprising a plurality of segments;
• one or more processors, the one or more processors configured to:
• detect backscattered light of the injected pulses of light, wherein the backscattered light is caused by two or more perturbations at a first segment of the cable;
• detect at the first segment of the cable, based on the backscattered light, the two or more perturbations occurring at respective locations from the first segment, wherein:
• at least two of the two or more perturbations occur from a respective perturbation source, and
• the detecting comprises determining, based on backscattered light, respective strain rate signals;
• determine, based on the detected two or more perturbations and the respective strain rate signals, respective distance between each of the two or more perturbations and the first segment of the cable;
• triangulate, based on the determined distances and a length of the first segment, a location of the first segment of the cable;
• map a path of the cable from a starting segment of the cable to the location of the first segment of the cable;
• and
• provide for output a map of the path of the cable in the fiber network.

A non-transitory computer-readable medium storing instructions for mapping an underground cable in a fiber network, which when executed by one or more processors, cause the one or more processors to:

• detect backscattered light of pulses of light injected by a laser, wherein:
• the backscattered light is caused by two or more perturbations at a first segment of the cable, and
• the cable comprises a plurality of segments;
• detect at the first segment of the cable the two or more perturbations occurring at respective locations from the first segment, wherein:
• at least two of the two or more perturbations occur from a respective perturbation source, and
• the detecting comprises determining, based on backscattered light, respective strain rate signals;
• determine, based on the detected two or more perturbations and the respective strain rate signals, respective distance between each of the two or more perturbations and the first segment of the cable;
• triangulate, based on the determined distances and a length of the first segment, a location of the first segment of the cable;
• map a path of the cable from a starting segment of the cable to the location of the first segment of the cable;
• and
• provide for output a map of the path of the cable in the fiber network.