Technologie und Elektrolumineszenz des Systems Galliumphosphid-Aluminiumphosphid

Diss. Dokt.-Ir. Aache

Fibre Optic Communication: Key Devices

The book gives an in-depth description of the key devices of current and next generation fibre optic communication networks. In particular, the book covers devices such as semiconductor lasers, optical amplifiers, modulators, wavelength filters, and detectors but the relevant properties of optical fibres as well. The presentations include the physical principles underlying the various devices, the technologies used for the realization of the different devices, typical performance characteristics and limitations, and development trends towards more advanced components are also illustrated. Thus the scope of the book spans relevant principles, state-of-the-art implementations, the status of current research and expected future components

Fibre optic communication: key devices

The book gives an in-depth description of key devices of current and next generation fibre optic communication networks. Devices treated include semiconductor lasers, optical amplifiers, modulators, wavelength filters and other passives, detectors, all-optical switches, but relevant properties of optical fibres and network aspects are included as well. The presentations include the physical principles underlying the various devices, technologies used for their realization, typical performance characteristics and limitations, but development trends towards more advanced components are also illustrated. This new edition of a successful book was expanded and updated extensively. The new edition covers among others lasers for optical communication, optical switches, hybrid integration, monolithic integration and silicon photonics. The main focus is on Indium phosphide-based structures but silicon photonics is included as well. The book covers relevant principles, state-of-the-art implementations, status of current research as well as expected future components

Fibre Optic CommunicationKey Devices /

XXX, 682 p. 348 illus., 144 illus. in color.onlin

Codierer, Decodierer, System und Verfahren zum Übertragen verschlüsselter Daten

The invention relates to a coder for providing encrypted data which is to be transmitted via a transmission medium (200), comprising an encryption unit (104) which is designed to encrypt, in blocks, data received by the coder, and a processing unit (106). Said processing unit (106) is designed to distribute an encrypted data block randomly to a plurality of channels which are associated with the transmission medium (200), and a subblock which is to be transmitted via one the of channels and which comprises one part of the encrypted data block, together with a channel identification associated with the channel and a code value which is based on encrypted data in the subblock which is to be transmitted and the channel identification, for transmission via the associated channel of the transmission medium (200). A transmission medium for securely transmitting data comprises a multi-core optical fibre (200), wherein at least one core of said multi-core fibre (200) defines a data channel (2021-2024) for the transmission of data, and wherein at least one core of the multi-core fibre (200) defines a monitoring channel (2041,2042)