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Full-Text Articles in Engineering
Optimal Via Placement In Under Filled Embedded Multimode Waveguides, Nicholas J. Riegel, Matthew Howard, Christopher Middlebrook
Optimal Via Placement In Under Filled Embedded Multimode Waveguides, Nicholas J. Riegel, Matthew Howard, Christopher Middlebrook
Michigan Tech Publications
The self-imaging property of multimode waveguides creates a challenging problem when finding the optimal placement position of an out-of-plane coupler for embedded waveguides. This problem is compounded when the waveguides are coupled using a small input such as a vertical cavity surface emitting laser (VCSEL) or a single mode fiber where only some of the modes are generated. When the waveguide system is under filled, the coupling efficiency for the optical vertical interconnect assembly (VIA) can vary by as much as 6.2 dB depending on the length of the proceeding waveguide due to different output fields from the self-imaging property. …
Reconstruction Of Long Horizontal-Path Images Under Anisoplanatic Conditions Using Multiframe Blind Deconvolution, Glen E. Archer, Jeremy P. Bos, Michael Roggemann
Reconstruction Of Long Horizontal-Path Images Under Anisoplanatic Conditions Using Multiframe Blind Deconvolution, Glen E. Archer, Jeremy P. Bos, Michael Roggemann
Michigan Tech Publications
All optical systems that operate in or through the atmosphere suffer from turbulence induced image blur. Both military and civilian surveillance, gun sighting, and target identification systems are interested in terrestrial imaging over very long horizontal paths, but atmospheric turbulence can blur the resulting images beyond usefulness. This work explores the mean square error (MSE) performance of a multiframe blind deconvolution (MFBD) technique applied under anisoplanatic conditions for both Gaussian and Poisson noise model assumptions. The technique is evaluated for use in reconstructing images of scenes corrupted by turbulence in long horizontal-path imaging scenarios. Performance is evaluated via the reconstruction …