Single-mode fibres operating at few-mode wavelengths
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There are many communication systems where the initial requirement is for moderate bit-rates and transmission distances, but where the ability to upgrade for future applications is very important. One way of designing such a system may be to combine readily available low-loss, high-bandwidth, single-mode fibres, designed for optimum performance atλ=1.3μm, with economical and reliable LEDs that emit light atλ=0.85μm. Such a system would no longer be single-moded; the consequences for fibre loss and dispersion of allowing the second mode to propagate are examined and used to predict the performance limits for a two-mode fibre system.
KeywordsCommunication Network Communication System Optimum Performance Future Application Performance Limit
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