Proposal for diminishment of the polarization-dependency in a Si-nanowire multimode interference (MMI) coupler by tapering the MMI section

QC 20100525
This letter presents a design for diminishing the polarization-dependency of a Si nanowire-based multimode interference (MMI) coupler by using a tapered MMI section. The entrance width and waist width of the tapered MMI section are optimized to obtain a polarization-insensitive MMI length for N-fold self-imaging. The MMI section with a diminished polarization-dependency has a relatively large entrance width, which is beneficial to the separation of adjacent access waveguides for minimizing the coupling between them. One can tune the power splitting ratio of a 2 x 2 Si-nanowire MMI coupler by adjusting the entrance and the waist width of the tapered MMI section.

He, SailingKTH,Elektroteknisk teori och konstruktion(Swepub:kth)u1tir6md (författare)
KTHElektroteknisk teori och konstruktion (creator_code:org_t)

Ingår i:IEEE Photonics Technology Letters: Institute of Electrical and Electronics Engineers (IEEE)20:5-8, s. 599-6011041-11351941-0174

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