High speed optical network for asynchronous multiuseraccess applying periodic spectral coding of broadbandsources

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Abstract
The authors experimentally demonstrate robust asynchronous optical multiuser access using spectrally encoded broadband sources. In a system experiment, four transmitters operate simultaneously at 155.52 and 77.76 Mbit/s in an optically amplified tree network with standard singlemode fibres. A BER of 10–10 is achieved without an error floor using a tunable balanced receiver. This technique is suitable for application in arbitrary fibre network architectures.