Title :
Diffraction characteristics of superimposed holographic gratings in planar optical waveguides
Author :
Minier, V. ; Kervorkian, A. ; Xu, J.M.
Author_Institution :
Dept. of Electr. Eng., Toronto Univ., Ont., Canada
Abstract :
A coupled-mode analysis of superimposed holographic transmission gratings in single-mode planar optical waveguides is presented. The diffraction characteristics are shown to be sensitive to the polarization of the incident wave, the angular separation of the output waves and the relative index modulation between the gratings. The coupling between gratings affects the diffraction efficiencies and decreases the angular and wavelength selectivities. Nevertheless, good channel separation and high fanout can be obtained together.<>
Keywords :
holographic gratings; integrated optics; light polarisation; optical modulation; optical waveguide theory; refractive index; angular selectivity; angular separation; coupled-mode analysis; diffraction characteristics; diffraction efficiencies; good channel separation; grating coupling; high fanout; incident wave; light polarisation; output waves; planar optical waveguides; relative index modulation; single-mode; superimposed holographic gratings; transmission gratings; wavelength selectivities; Coupled mode analysis; Diffraction gratings; Holographic optical components; Holography; Optical diffraction; Optical modulation; Optical planar waveguides; Optical sensors; Optical waveguides; Planar waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
