We show that the weighted sum of phase errors of modes of multimode interference (MMI)
waveguide is minimum for largest access waveguide width. Also, we show the improvement …

In this paper, a novel MMI coupler, based on general interference, with tapered waveguide
geometry has been proposed for reduction of coupling length. The coupling characteristics …

We present simple analytical formulae to explicitly show the effects of various waveguide
parameters in the design of multimode interference (MMI) couplers with a general strip …

An improved approach for optimization of N× N silica multimode interference (MMI) couplers
is presented in this paper. Using guided-mode propagation analysis, we adjust the width …

Experimental results on multimode interference (MMI) coupler performance, when the
access waveguides are not single mode, are shown. The 3-dB MMI couplers based on …

Improved approach to low-loss and high-uniformity multimode interference (MMI) devices is
proposed in this paper. An optimized index contrast is selected to decrease the propagation …

Analytical expression of signal bandwidth of general straight and tapered N× N multimode
interference (MMI) couplers is presented. The signal bandwidth is characterized as a …

We derived an analytical formula for the optimum width of the access waveguides of 1× N
multimode interference (MMI) couplers. Eigenmode-decomposition-based simulations show …

We show that it is possible to obtain 2?? 2 waveguide couplers with arbitrary power splitting
ratios by interconnecting a pair of unequalwidth waveguides as the phase-tuning section …

The imbalance and excess loss in multimode interference couplers with fabrication errors
are examined. Remarkably, there exists a number of optimum access waveguide widths …