In the technology of communication over short distances fibre glass cables used in data transmission are increasingly being replaced by polymer fibres or polymer fibre-based transmission routes are being used instead of electronic data lines. The invention can also be used for data transmission within a computer or computer networks and leads to considerable increase of transmission capacity. For the implementation the transmission side, in addition to the already existing semi-conductor lasers in the red spectral area, requires easy-to-produce lasers (transmitters) that cover the green spectral area of approx. 500-580 nm. The polymer fibre has the lowest absorption losses in the green spectral area.
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