Design of Polarization-Independent Coarse Wavelength Splitters Based on Ridge-Waveguide Directional Couplers

Figure 7

The crosstalk for TE and TM polarizations at (a) 𝜆_𝑑=1.31 μm (at the cross-port) and (b) 𝜆_𝑑=1.54 μm (at the bar port).

(a)

(b)