Accessing guides first order mode influence and optimize tolerances in multimode interference couplers

C. Vazquez; Candido Aramburu; Jose M. Sanchez-Pena; Manuel Lopez-Amo

doi:10.1117/12.328760

4 December 1998 Accessing guide first-order mode influence and optimize tolerances in multimode interference couplers

C. Vazquez, Candido Aramburu, Jose M. Sanchez-Pena, Manuel Lopez-Amo

Proceedings Volume 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications; (1998) https://doi.org/10.1117/12.328760
Event: 1998 International Conference on Applications of Photonic Technology, 1998, Ottawa, Canada

Abstract

Influence of first order mode excitation in input/output waveguides of multimode interference couplers is analyzed. Emphasis in common mode rejection ratio penalty in 3-dB couplers as part of balance coherent detection receivers is encountered. Design analysis is carried out in InGaAsP/InP buried waveguides. Coupler behavior is modified basically when first order mode is excited at input waveguides. A drastically reduction of 25% couplers width tolerance is derived from first order mode partial presence (10% of full input optical power) in accessing waveguides. Some guidelines about width tolerance improvement in restricted interference couplers against general interference couplers is also reported. Couplers dependence on fabrication tolerance was described as a function of power distribution between different modes in multimode section.

Citation Download Citation

C. Vazquez, Candido Aramburu, Jose M. Sanchez-Pena, and Manuel Lopez-Amo "Accessing guide first-order mode influence and optimize tolerances in multimode interference couplers", Proc. SPIE 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications, (4 December 1998); https://doi.org/10.1117/12.328760

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