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<sup>-10</sup> is achieved without an error floor
using a tunable balanced receiver. This
... [Show full abstract] technique is suitable for
application in arbitrary fibre network architectures