Karl Olaw Christian Wagner

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A new approach to learning in a multilayer optical neural network based on holographically interconnected nonlinear devices is presented. The proposed network can learn the interconnections that form a distributed representation of a desired pattern transformation operation. The interconnections are formed in an adaptive and self-aligning fashioias volume(More)
We describe and demonstrate an interferometric technique for measuring the first-order cross correlation of ultrafast optical pulses. This technique may permit single-shot pulse detection and is applicable to receivers for time-domain optical communications. Ultrashort optical pulses are characterized by measurement of correlation functions of the field. A(More)
Software targeting general purpose processing (GPP) elements has been successfully reused for software defined radio (SDR) platforms in support of low-bandwidth waveforms. The Joint Tactical Radio System (JTRS) Software Communications Architecture (SCA) promotes reuse of GPP-based software by providing a consistent framework for developing reusable waveform(More)
Since the 1990s, national green building certification indices have emerged around the globe as promising measurement tools for environmental-friendly housing. Since 2008, tools for countries in the Northern " colder " hemisphere have been adapted to tropical countries. In contrast, the Tropically Adapted Energy Performance Certificate (TEPC), established(More)
Deriving unambiguously the orbital parameters and masses of extrasolar planets requires at least 2-dimensional information on either the positions or motions of the planet directly (currently out of reach) or, indirectly, of the host star. The latter can be done with high-precision astrometry at the 10 microarcsec level. To achieve this goal, a consortium(More)
Simple patterns consisting of three spots (V and Gamma) have been recognized by dividing, shifting, and recombining beams onto bistable ZnS interference filters. This experiment demonstrates AND-gate operation, cascading, and a moderate amount of parallelism, but a laser power of several watts was required and the response times were several milliseconds.(More)
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Reliability of micro-electronic devices is one of the most important issues in mobile communication systems and is significantly influenced by the thermal behavior of the components. The present contribution demonstrates Liquid Crystal Thermography (LCT) and Infrared Thermography (IRT) in exemplary investigations of self-heating effects in a half-section(More)