Parallel recording with optical waveguide array

Abstract

We present an analysis of the reading capability of a novel optical pickup consisting of a single-mode and a multi-mode rectangular waveguide. According to the simulations, if one has prior information about the structure of the disk, superresolution readout could be achieved. The proposed system has the advantage to be compact and should be straightforward to be extended to arrays. The working distance of this optical pickup can be adapted from near-to farfield by changing the length of the multi-mode waveguide.

Cylindrical Multimode Waveguides as Focusing Interferometric Systems

“…It has been shown that the resolution of the self-imaging effect in planar waveguides is about W λ / 4 , which is much smaller than the waveguide width W . This enables multimode waveguides to be used as focusing systems. , In planar waveguides, waveguide grating lenses have been used for focusing of visible light . Self-imaging in cylindrical waveguides was theoretically analyzed in ref .…”