US Patent 7382215 Image guide coupler switch

In one implementation, a method is provided for an image guide coupler. The method includes controlling a coupling between adjacent waveguides of a propagating wave by controlling a coupling through at least one field pick up probe positioned next to the adjacent waveguides. In some implementations, controlling the coupling through the at least one field pick up probe includes using a series connected switch. In some implementations, the method includes controlling the coupling through the at least one field pick up probe using a pin diode, a transistor, a MEMS switch, or a varactor, in series with the at least one field pick up probe.