Abstract: A device and process is disclosed for creating detailed volumetric ocean els, which in turn are used as inputs for naval tactical and oceanographic analysis. Near-real-time volumetric modelling is accomplished by continuously integrating, filtering, interpolating, and extrapolating oceanographic data (e.g., temperature, sound velocity, conductivity, salinity, bathymetry, current, chlorophyll) from historical data bases, forecasts, remote sensors, and onboard sensors. The value of the invention can be appreciated in the detailed, time-varying, three-dimensional ocean models which can be realized for mesoscale and smaller areas and the ability to use these more detailed and timely ocean models for three-dimensional acoustic propagation predictions and combat control algorithms. Tactical and oceanographic models are computed using an advanced processor and the results are displayed using three-dimensional visualization softwaare and hardware techniques.

Abstract: By appropriately arranging and configuring dielectric waveguides formed within a substrate, a path configuration suitable for use in laser interferometer may be fabricated in a small overall area without sacrificing overall sensitivity. The path configuration includes a disposition of overlapping waveguide loops in a first and second plane. Intersection of the crossing waveguide segments is avoided by appropriate disposition of the respective segments in the two separated planes. Transition between the two planes may be made by means of a twisted waveguide bend or a transitional coupler. In one embodiment each waveguide loop may have a generally rectangular shape. The parallel sides of each loop are offset from the adjacent loops by a predetermined distance such that the horizontal dimension of the loops decreases while the vertical dimension increases between the first and last loop of the configuration.