Abstract
Planar holographic Bragg reflectors (HBRs) are computer-generated slab-waveguide holograms. They operate in two dimensions to provide powerful free-space-like spectral and spatial processing of optical signals in an integrated optics environment. An HBR typically images an input port to an output port while applying a specific spectral filtering function. HBRs are fully consistent with robust photolithographic or imprint-based fabrication and can be flexibly designed to offer a wide range of spatial wavefront control and single and multichannel spectral transfer functions. We report on lithographically fabricated,focusing HBRs implemented in the silica-on-silicon format whose spectral and spatial performances reach fundamental device limits set, respectively, by Fourier transform and diffractive constraints. We also demonstrate that HBRs support a unique process-friendly approach to apodization and overlay that uses fixed-depth etching and partial contour writing to achieve continuous reflective amplitude control of constitutive diffractive elements.
© 2004 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription