Wavelength Dispersive Planar Waveguide Devices: Echelle and Arrayed Waveguide Gratings

This chapter deals with the wavelength dispersive planar waveguide devices which are waveguide echelle grating (EG) and arrayed waveguide grating (AWG). It conveys about the principles of EG and AWG. In waveguide EG each grating facet represents a small source reflecting and transmitting incident light according the laws of reflection and refraction, and simultaneously acts as a narrow diffraction slit, thus determining the envelope of the …