PCB integrated waveguides Launching light into highly multi mode structures cd.

4. SUMMARY

An existing set-up for attenuation characterization of integrated waveguide was altered to enhance its repeatability and accuracy. A PC control was added to get an automated scan procedure. With the usage of MMF a sufficient repeatability was obtained while it integrates the modal noise. The realized experiments for the launching condition clearly identify the MMF as the more suitable for attenuation measurement. It was proven that water immersion yields better reading for the coupling. The observed speckle pattern and its impact in form of modal noise is described and discussed. The set-up at hand provides a powerful tool for many enclosed investigations.
5. ACKNOWLEDGEMENT
This work results from a long lasting cooperation between Wrocław University of Technology (Poland) and Dresden University of Technology (Germany). The work was supported by the German Research Council (Deutsche Forschungsgemeinschaft) as a part of the Graduate Program “Sensorics”. The “waveguide-in-copper” technology was developed in collaboration with Fraunhofer-Institute for Reliability and Micro­Integration (FhG IZM).

Autorzy: Michał DUŻYNSKI, Ralf RIESKE, Klaus-Jürgen WOLTER, Sergiusz PATELA

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