100-channel optical FDM transmission/distribution at 622 Mbit/s over 50 km utilising a waveguide frequency selection switch

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Abstract
100-channel optical FDM transmission/distribution at 622 Mbit/s is demonstrated for a fibre length of 50 km. A polarisation-insesitive waveguide frequency-selection-switch with 10 GHz intervals and an FSK/direct-detection scheme using a Mach–Zehnder filter type optical frequency discriminator are verified as feasible.