Page 209 - Introduction to Information Optics
P. 209

3. Communication with Optics

                                    [~]Node


                                                Node





                                                Node

                                        Node
                                  (a)
                                         Node


                                                Node




                        Node                     Node


                                         Node
                                       (b)


                                     Bus
                            Node  Node Node Node Node







                                       (c)
       Fig. 3.16. Some basic physical topologies favored for optics networks, (a) Star, (b) Ring, (c)
       Reentrant bus.



       loss has to be as small and as uniform as possible over different wavelength
       channels. Cross talk is light attenuation measured at an unintended port. The
       attenuation is as large as possible in this case. The best case is zero output at
       the unintended port due to the large attenuation. Multiplexers have been
       designed to accommodate numerous channels (more than 100 will be used
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