Author(s)

Chaojun Yan, Wenbiao Peng and Juling Zeng

Corresponding Author

Chaojun Yan

ABSTRACT

The devices of rib waveguides on SOI with large cross-section are widely used in modern communication system. It is necessary to verification the single-mode condition proposed in historical papers. The scalar finite difference beam propagation method is used to solve the guide modes supported by rib waveguides. It is verified that the precision of single-mode condition in horizontal direction can reach better accuracy if the constant in equation is changed from 0.3 to 0.23.

KEYWORDS

Integrated optics, Rib waveguide, Multimode interference coupler, Single-Mode condition, FDBPM