| The research about free space optical iflterconnection arefocused on optical combined component such as lens array,polarization beam splitter to implement optical networks. These years,holograPhic technology (incIuding fOur-focus lens, computeringholograPhy, holograPhic grating )are wideIy used in butterfly. perfectshuffle network. ln this dissertation, Bragg grating are used toimPlemeflt l-D,2-D crossover network. A whole scheme is providedto make component in crossover network. The characteristic of thecomponent and the method of its improvement are also offered. |
