FiberWireIntrusionMesh

string fiber through fences
string fiber cable through a fence, any climbing over fence bends the light propagaion in the fiber triggering an alert. there are hundreds of patents on this idea making it impossible to commercialize. HackPatents and sell the system via a fronting company.

Distributed optical fiber fence intrusion detection and location method based on phi-OTDR (Optical Time Domain Reflectometer) CN 102280001 B