| 摘要 |
PURPOSE:To solve the difficulty for setting a parameter for further demultiplexing a wavelength of odd times exceeding three wavelengths by constituting the titled device so that a wavelength demultiplexed as a wavelength of odd times is set to <=2 wavelengths in an optical waveguide system of each stage, in a constitution for connecting in a multistage the optical waveguide system which has utilized an evanescent coupling. CONSTITUTION:Two optical waveguides 3 are connected adjacently so that an evanescent coupling is generated and interaction areas l1-l7 are constituted, and the areas l1-l4 are connected adjacently in series so as to satisfy the equation. First of all, in the area l1, wavelengths lambda4, lambda6 by which a length of the interaction area becomes odd times of a coupling length, and wavelengths lambda1, lambda2, lambda3, lambda5, lambda7, lambda8, and lambda9 by which said length becomes even times are demultiplexed, and the wavelengths of even times are made incident on the area l2. In the same way, in the area l2, the area l3, and the area l4, wavelengths lambda3, lambda7 of odd times and wavelenths lambda1, lambda2, lambda5, lambda8, and lambda9 of even times, wavelengths lambda2, lambda8 of odd times and wavelengths lambda1, lambda5, and lambda9 of even times, and wavelengths lambda1, lambda9 and a wavelength lambda5 are demultiplexed, respectively. On the other hand, the wavelengths of odd times which have been demultiplexed can be demultiplexed in the areas l5, l6, and l7, respectively. Also, in the reverse process, the multiplexing can also be realized. |
