FIBLOC - An Optical Fiber Intrusion Location Sensor for Perimeter Protection and Intruder Identification

FIBLOC denotes a fiber optic intrusion location sensor system; it is based on a US patent held by ANRO Engineering, Inc., and the FIBLOC mark is registered. The physical basis of the sensor rests on the (phase) sensitive interference phenomena which govern propagation of an off axis optical / infra-red beam through a graded index fiber. A demonstration FIBLOC system, 100 meters in length and capable of localizing points of intrusion within 20 meters was constructed. The processor yields negligible false alarm rate and applies signal discriminants to identify the likely intruder as runner, walker or crawler. The system is ready for PHASE III application and commercial development.