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Dive into the research topics where Hans Dr Dammann is active.

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Featured researches published by Hans Dr Dammann.


Iete Journal of Research | 1988

Nonreciprocal Components for Optical Communication

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

Method of forming at least one groove in a substrate layer

Ralf-Dieter Boehnke; Hans Dr Dammann; Gert Rabe


Archive | 1983

Optical wavelength-multiplexing and/or demultiplexing device

Hans Dr Dammann; Ulrich Killat; Gert Rabe


Archive | 1981

Diffraction grating and system for the formation of color components

Hans Dr Dammann


Archive | 1989

Device for working a workpiece using laser light

Hans Dr Dammann; Gert Rabe; Paul J. Patt; Christian H. F. Velzel; Klaus Benno Schildbach


Archive | 1980

Coupling device for coupling signals into and out of a transmission glass-fiber

Hans Dr Dammann; Ulrich Killat


Archive | 1990

PLANAR OPTICAL ISOLATOR

Hans-Juergen Prof Schmitt; Juergen Seidenberg; Norbert Thorweihe; Hans Dr Dammann; Volker Doormann; Jens-Peter Krumme


Archive | 1985

Compound optical phase grating and optical switch

Hans Dr Dammann; Heinrich Dr. Kurz


Archive | 1972

Method of producing three-dimensional images from a series of individual images in different perspectives

Hans Dr Dammann; Manfred Dipl Phys Dr Kock; Ulf Tiemens


Archive | 1987

Magneto-optical waveguide device with artificial optical anisotropy

Hans J. Schmitt; Gunter L. Schmitz; Hans Dr Dammann

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