Guided‐wave microlens array applications to compact 1 × 8 planar waveguide splitters

A compact 1 × 8 waveguide splitter using a guided‐wave microlens array is presented and analyzed to show low insertion loss and output imbalance of 0.28 and 0.15 dB, respectively. The analysis results show that the proposed equal‐power splitter with insensitive wavelength responses and acceptable fabrication tolerances is applicable for compact and wide‐bandwidth integrated optical devices.