Hans Dr Dammann
Philips
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Publication
Featured researches published by Hans Dr Dammann.
Iete Journal of Research | 1988
Hans J Schmitt; Hans Dr Dammann
Optical isolators and circulators are needed to reduce feedback effects and noise in optical communication systems. These devides are based on the Faraday rotation or nonreciprocal phase shift in magnetooptic materials such as YIG, which is highly transparent for λo> 1 μm. Several versions of discrete microoptic devices provide ∼30 dB isolation independent of polarization. For integrated devices classical E/H/-mode converters, semileaky structures, cut-off isolators and differential phase shift components are investigated. Major progress has been made with respect to improved materials (θF >3000°/cm), analysis of optical waveguide modes in strips and multilayer structure and controlled phase match for coupling modes. Remaining problems include the combination of different subelements and integration on semiconductor substrates of integrated optics.
Archive | 1991
Ralf-Dieter Boehnke; Hans Dr Dammann; Gert Rabe
Archive | 1983
Hans Dr Dammann; Ulrich Killat; Gert Rabe
Archive | 1981
Hans Dr Dammann
Archive | 1989
Hans Dr Dammann; Gert Rabe; Paul J. Patt; Christian H. F. Velzel; Klaus Benno Schildbach
Archive | 1980
Hans Dr Dammann; Ulrich Killat
Archive | 1990
Hans-Juergen Prof Schmitt; Juergen Seidenberg; Norbert Thorweihe; Hans Dr Dammann; Volker Doormann; Jens-Peter Krumme
Archive | 1985
Hans Dr Dammann; Heinrich Dr. Kurz
Archive | 1972
Hans Dr Dammann; Manfred Dipl Phys Dr Kock; Ulf Tiemens
Archive | 1987
Hans J. Schmitt; Gunter L. Schmitz; Hans Dr Dammann