Monolithic InP Multiwavelength Coherent Receiver Using a Chirped Arrayed Waveguide Grating
15 February 2011
We propose and demonstrate a novel four-channel monolithic polarization-diversity dual-quadrature coherent receiver with balanced detection in InP. It uses an interleave-chirped arrayed waveguide grating that acts simultaneously as a demultiplexer, four polarization splitters, and four 90 degrees hybrids. There are no waveguide crossings, and the polarization extinction ratio is >21 dB and the hybrid phase error magnitude 1 degrees without any post-fabrication adjustments. We demonstrate 4 X 43-Gb/s reception.