A reconfigurable multiwavelength network element includes a first demultiplexer unit for demultiplexing a first multiplexed optical signal from a first optical fiber into a first plurality of optical outputs; a second demultiplexer unit for demultiplexing a second multiplexed optical signal from a second...http://www.google.de/patents/US6272154?utm_source=gb-gplus-sharePatent US6272154 - Reconfigurable multiwavelength network elements
