Performance evaluation of a few- and multi-mode fiber-optic perimeter sensor

We present an evaluation of the performance of a simple hand-held fiberoptic perimeter sensor which can operate both in a few-and multi-mode regime of operation of the fibers used. Single fiber cables or stacked sequences of few-and multi-mode fibers can be used. Intermodal interference produces analog signal which is further fed into an 8 channel multiplexer and is then processed by a microprocessor. The unit features connection to a PC and a radio network. The responses to various types of perturbations have been analyzed using Weibull distributions.