We designed and fabricated a SOI based insertion loss non-uniformity enhanced star coupler with improved total transmission. The design utilizes a ‘squeeze’ dual input taper with auxiliary input taper placed right next to the central input taper. The specially designed taper structure transforms the fundamental Gaussian-shaped input profile at the entry of the free propagation region into a sinc mode field which produces a flat-top far field profile at the output waveguides array, without adding to the overall device footprint.