Design of Polarization-Independent Coarse Wavelength Splitters Based on Ridge-Waveguide Directional Couplers
Figure 3
Effective indexes of InP/InGaAsP ridge waveguides for TE and TM polarizations as a function of (a) waveguide width and (b) operation wavelength. The InGaAsP core index is 3.5 while the InP cladding index is 3.17. All core thicknesses are 0.65 μm.
