Continuous Wave (CW) Laser Detection Techniques

Pacific Advanced Technology (PAT) is pleased to propose a new and creative solution to single aperture multi-spectral laser warning. Our proposed approach to laser warning can detect multiple laser spectral bands with a single aperture over a wide field of view and determine angle of arrival with in less than a degree. As an example of the multi-spectral nature of this approach, a laser in the midwave infrared as well as a longwave infrared can be detected with a single aperture, thus minimizing modifications to existing platforms and reduce sensor costs due to less components needed. This proposal approach to laser warning uses speckle gram interferometry to perform optical signal processing for coherence detection, coupled with neural network signal processing for classification and direction of arrival. Using neural networks on the focal plane array to perform the post signal processing will enable real time detection, discrimination and warning in a light weight small package. This new technology allows the straight forward manufacture of a simple, compact optical system which will detect and warn against laser threats. During the phase I portion of this SBIR we will model the PAT proposed laser warning approach for the Army's CW threats using the PAT laser warning computer simulation model. We will also perform a first order design of the neural network signal processor that is an integral part of the PAT approach to a laser warning system. To our knowledge this approach to laser warning has not been discussed, offered or pursued elsewhere in the Department of Defense.