Ultra compact cross-order AWG triplexer based on SU-8 polymer

A compact arrayed waveguide grating triplexer based on small SU-8 strip waveguides is designed by using cross-order method. The AWG triplexer has a very compact size of as small as 1.3 × 0.402 mm2 since the high index contrast between SU-8 core layer and SiO2 and air cladding, and can be easily fabricated by using direct ultraviolet photolithography process without additional etching process. The simulation results show that the 3-dB bandwidths of three channels (1310nm, 1490nm and 1550nm) for TE polarization are greater than 11 nm and each channel has a low polarization dependence wavelength shift less than 0.65nm.