Compact MMI-Based AWGs in a Scalable Monolithic Silicon Photonics Platform

We demonstrate a compact ( $367 \times 67 \, \mu {\text{m}}^2$ ) four-channel wavelength division multiplexer using an arrayed waveguide grating based on multimode interference couplers, and built monolithic silicon photonics platform. The design is particularly attractive due to the thin device layer. A semi-numerical approach was used for simulation. Optical measurements were found be consistent with simulation results. channel spacing, 3-dB bandwidth crosstalk measured 97 GHz, 87 GHz 9.6 dB, respectively, designed of operation near 1310 nm.