| 摘要 |
PURPOSE:To branch an incident optical power to an arbitrary one optical waveguide to N output optical waveguides uniformly by forming the input of the center part of a slab optical waveguide and the core width of the output optical waveguide smaller that that of a peripheral part and that of the output optical waveguide other than that. CONSTITUTION:An input optical waveguide array is the aggregate of a large number of input optical waveguides 1, and an output optical waveguide array is the aggregate of the same number of output optical waveguides 2 as that of the input optical waveguides 1. Those input and output optical waveguides 1, 2 are constituted of rectangular optical waveguides covered with clad with different re-fractive indexes, and they are arranged at both terminals of the slab optical waveguide 3 confronting with each other. The core width of the input and output optical waveguides 1, 2 in the center part are formed smaller than that of the peripheral part, and light of unrequitrd mode easy to generate in the center part is given away to the outside the waveguide by narrowing down the core width. As a result, the incident optical power to one optical waveguide can be branched to N output optical waveguides uniformly. |
