Abstract
A new type of 1×3 Y-branch optical waveguide structure with a cone transitional section is introduced in this paper. The symmetrical branch ratio of the 1×3 Y branch optical waveguide is obtained by changing the width of this waveguide. The loss and the uniformity are obtained by using the finite difference beam propagation methods, and their values are 0.2dB and 0.05dB, respectively. Therefore, it provides some experimental basis for production of three branch optical waveguide.
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