Design and fabrication of 1.31-1.55-/spl mu/m phased-array duplexer on InP

1.31-1.55-/spl mu/m InP duplexers based on low-order waveguide arrays have been modeled, fabricated and characterized. By introducing lateral offsets between straight and curved waveguides, polarization insensitive devices with 5-dB on-chip loss, and less than -30-dB crosstalk over 100-nm wavelength range have been obtained, showing good agreement between theory and experiment.