(WDM) systems. A high refractive index resonator is coupled to a waveguide and extracts
light from the waveguide at its resonance frequency. A taper in the thickness of the resonator
allows light of different wavelengths to be extracted at different positions. A structure is
fabricated for use at 750 nm with a measured dispersion of 29 nm/cm and a wavelength
resolution of 1 nm. The device operation is in good agreement with first-order coupled-mode …