Optical multiplexer/ demultiplexer

Details Optical multiplexer/ demultiplexer Optical multiplexer/ demultiplexer

H - Electricity

04

J

H04J 14/00 (2006.01) G02B 6/12 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2333436

In an optical multiplexer/demultiplexer comprising optical multiplexer/demultiplexer circuits connected in multistage, the multiplexer/demultiplexer circuits each have two input ports and two output ports, an optical path, through which input optical signals with predetermined wavelengths are output after multiplexing and demultiplexing, varies depending upon the input port; the optical paths in each of the multiplexer/demultiplexer circuits have mutually opposite wavelenghth dispersion characteristics, and one of the optical paths in a first multiplexer/demultiplexer circuit is connected to one of the optical paths, in a second multiplexer/demultiplexer circuit, having wavelength dispersion characteristics opposite to the optical path in the first multiplexer/demultiplexer circuit. By virtue of this construction, an optical multiplexer/demultiplexer can be realized which causes no significant wavelength dispersion and, at the same time, has excellent wavelength flatness characteristics in passband.

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