| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wavelength multiplexing/demultiplexing device capable of adjusting a characteristic at a manufacturing stage. <P>SOLUTION: A wavelength multiplexing/demultiplexing device 800 comprises: an input waveguide 802; a monitoring waveguide 822; a Mach-Zehnder interferometer; an arrayed waveguide grating; and multiple output waveguides 812. In order to adjust a wavelength characteristic of athermalized wavelength multiplexing/demultiplexing device, a temperature compensating material 818 which has a different temperature coefficient of effective index from the waveguide is filled in grooves formed in the waveguides. To be more precise, other grooves are formed in the waveguides, and multiple refractive index adjusting materials with different refractive indices are filled in the grooves to adjust the wavelength characteristic. Another acceptable method is to measure the wavelength characteristic of the wavelength multiplexing/demultiplexing device and to change a combination of refractive index adjusting materials to be filled in, in accordance with the measuring result. As a result, a variation in the characteristic resulting from an error in manufacturing the wavelength multiplexing/demultiplexing device is compensated, and a yield can be improved. In the case of the athermalized wavelength multiplexing/demultiplexing device, it is possible to adjust the characteristic of the wavelength multiplexing/demultiplexing device at a manufacturing stage. <P>COPYRIGHT: (C)2012,JPO&INPIT |
