INTEGRATED-OPTIC GRATING-COUPLER-BASED OPTICAL HEAD

An integrated optic grating-coupler-based optical recording head that contains fewer components and is easier to align than a conventional b ulk-optics-based optical head is presented. radial tracking, and focus error signals obtained with the head are presented. grating head on a single coupler on a single substrate is proposed, using a grating to tapered film waveguide.An integrated optic grating-coupler-based optic al recording head that contains fewer components and is easier to alig n than a conventional bulk-optics-based optical head is presented. Exe mplary rf signals. radial tracking, and focus error signals obtained w ith the head are presented. The integration of the grating head on a s ingle coupler on a single substrate is proposed, using a grating to ta pered film waveguide.