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Waveguide Integrated Germanium Photocells in Silicon

2024 Conference on Lasers and Electro-Optics, CLEO 2024

Sjaardema, T.; Dallo, Christina M.; Starbuck, Andrew L.; Pomerene, Andrew; Trotter, D.; Gehl, Michael; Kodigala, Ashok

We demonstrate for the first time waveguide integrated cascaded germanium photodetector arrays operated as photocells. We characterize several different array designs, and discuss their effects on voltage and photocurrent performance parameters.

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Waveguide Integrated Avalanche Photodiodes for Quantum Applications

CLEO: Science and Innovations, CLEO: S and I 2024 in Proceedings CLEO 2024, Part of Conference on Lasers and Electro-Optics

Sjaardema, T.; Boady, Matthew S.; Starbuck, Andrew L.; Pomerene, Andrew; Trotter, D.; Otterstrom, Nils T.; Gehl, Michael

We demonstrate evanescently coupled waveguide integrated silicon photonic avalanche photodiodes designed for single photon detection for quantum applications. Simulation, high responsivity, and record low dark currents for evanescently coupled devices are presented.

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History and Evolution of the Johnson Criteria

Sjaardema, T.; Smith, Collin; Birch, Gabriel C.

The Johnson Criteria metric calculates probability of detection of an object imaged by an optical system, and was created in 1958 by John Johnson. As understanding of target detection has improved, detection models have evolved to better model additional factors such as weather, scene content, and object placement. The initial Johnson Criteria, while sufficient for technology and understanding at the time, does not accurately reflect current research into target acquisition and technology. Even though current research shows a dependence on human factors, there appears to be a lack of testing and modeling of human variability.

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4 Results
4 Results