A Low-loss 4-channel Arrayed Waveguide Grating Using Parabolic Tapered Waveguides

We present a low-loss 4-channel AWG based on parabolic tapered waveguides. The parabolic tapered waveguides can effectively reduce the average insertion loss from 5 dB to 1.2 dB and improve the 3 dB bandwidth from 15 nm to 16.3 nm.