Polymer Waveguide with 4-Channel Circular GI Cores toward High-Speed Optical Interconnects

Abstract
We fabricate polymer waveguides with 4-channel circular graded-index cores for the first time by the preform method. The new waveguide exhibits very low-loss (0.029 dB/cm), high bandwidth (estimated 60 Gbps for 1 m) and low inter-channel crosstalk.