Patent ID: 6980713
Filing Date: 2005-12-27
Classification: G02B,H04J

Abstract:
1. An apparatus for transmitting radiation of multiple wavelengths, comprising: a first input channel carrying radiation of one or more wavelengths; a first output channel; a second input channel carrying radiation of a first wavelength to be added; a second output channel for receiving radiation of at least one wavelength that is to be dropped; and a switch member having a plurality of filters, wherein the switch member is movable among a plurality of positions; a first connecting channel, wherein when the switch member is in a first position, the radiation carried by the first input channel and the second input channel reaches a first filter, the first filter passes radiation of a predetermined wavelength in the radiation carried by the first input channel to the second output channel and reflects the remaining wavelengths through the first connecting channel, reaching the first filter and reflected again, the reflected radiation of the remaining wavelengths and the radiation of the first wavelength passing through the first filter are received by the first output channel.