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A square holey cladding waveguide is designed and fabricated to support TE and TM polarizations for 180 GHz to 360 GHz chip-to-chip communication. The mode profile and normalized output power of the waveguide are simulated. A fabricated waveguide is tested using a vector network analyzer for mode mapping and loss measurements. The mode profile was mapped using a 250 μm pinhole stepped across the waveguide...
The first demonstration of an active optical lattice filter with nanophotonic 4-port couplers is reported. The experiments are in good agreement with a z-transform based filter theory. The filter response may be tuned by adjusting the gains of the active optical element of the filter, herein realized with semiconductor optical amplifiers. A key to the compact realization, and the device's operation,...
A single CCD/DSP camera based optical system affords six degree of freedom motion tracking for MRI applications with resolutions in the range of <;50 microradians and 10-100 microns. The fiducial target is a lightweight compact three dimensional pattern that allows efficient, centroid based algorithms to determine distance translation and angle rotation at rates of 30Hz. In-magnet tests measure...
A 2D Active Lattice Filter ALF combining a Manhattan grid of waveguide gain segments with nanophotonic couplers at the waveguide intersections is presented. The particular application reported herein is a basic channelizer. The resulting structure is readily described, designed, and analyzed in Z-transform space. Critical to the implementation of the 2D ALF circuit is a highly efficient small footprint...
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