Hybrid photonic crystal 1.31/1.55 μm wavelength division multiplexer based on coupled line defect channels

►Multiplexing of 1.31/1.55 μm signals with power transfer efficiency of about 88%. ►Extinction ratios obtained at 1.31/1.55 μm wavelengths are − 25.8 dB and − 22.9 dB. ►Channel interleaver designed for multiplexed signals with spacing of 0.8 nm. ►Interleaver exhibit power transfer efficiency between 85 and 90%.