Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Moritz Baier

Francisco Soares

Martin Schell

A modulator assembly for modulating light comprising a first and a second electro-absorption modulator which each at least substantially only act on a polarization component of incident light; a light generating assembly for generating light which includes a first and a second polarization component; a first electro-absorption modulator for modulating the light generated by the light generating assembly, wherein the first electro-absorption modulator at least substantially only modulates the first polarization component of the light, so that the light exiting from the first electro-absorption modulator includes a modulated and an unmodulated polarization component; a polarization converter for changing the polarization direction of the light exiting from the first electro-absorption modulator. The light exiting from the polarization converter couples into the second electro-absorption modulator and is polarized such that by means of the second electro-absorption modulator a modulation at least substantially is effected only of the previously unmodulated polarization component.

Modulator assembly and method for modulating light

It is provided a method for producing a polarization converter The method comprising the following steps: producing a first converter element which has a base side, an upper side extending parallel to the base side, and a longitudinal side oriented obliquely at an angle &#x3b5;to the base side or a curved longitudinal side; producing a second converter element which has a base side, an upper side extending parallel to the base side, and a longitudinal side oriented obliquely at an angle &#x3b5;to the base side or a curved longitudinal side; arranging the first and the second converter element in series in such a way that the obliquely oriented or curved longitudinal sides point in opposite directions.

Method for producing a polarization converter, polarization converter and polarization converter element

A device for determining a polarization state of an electromagnetic wave includes a power splitter that splits an electromagnetic input wave into at least three partial waves; and at least three polarization converters for changing the polarization state of the partial waves. One of the polarization converters is associated with one of the three partial waves. The device includes an output coupler to which the partial waves are supplied after passing through the respective polarization converter and which includes at least three outputs. The output coupler is configured and the polarization converters are arranged and configured such that output waves exiting from the outputs of the output coupler have an intensity that each is dependent on one of the Stokes parameters of the input wave.

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Berlin, Germany

Moritz Baier