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Proceedings Paper

Compact-footprint focusing lithographically scribed planar holographic Bragg reflector
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Paper Abstract

Planar holographic Bragg reflectors (HBR’s) are slab-waveguide-based computer-generated two-dimensional in-plane refractive-index holograms. The slab waveguide allows signals to propagate freely in two dimensions, a geometry that enables HBR’s to offer powerful holographic function in the form of simultaneous spectral and spatial signal processing in a single element. Owing to their planar structure HBR’s are fully consistent with photolithographic fabrication which provides complete amplitude and phase control over individual diffractive elements thus providing a flexible means to precisely engineer device spectral transfer functions. Here, we report on a photolithographically-fabricated silica-on-silicon slab-waveguide-based HBR that provides 17 GHz, essentially Fourier-transform limited, spectral resolution in a device footprint of only 0.3 cm2 . The device maps the input beam to a spatially distinct output with diffraction-limited performance. Our results conclusively establish that the silica-on-silicon format and submicron photolithography can provide fully coherent planar holographic structures of centimeter scale.

Paper Details

Date Published: 20 October 2003
PDF: 7 pages
Proc. SPIE 5225, Nano- and Micro-Optics for Information Systems, (20 October 2003); doi: 10.1117/12.517123
Show Author Affiliations
Christoph Greiner, LightSmyth Technologies, Inc. (United States)
Dmitri Iazikov, LightSmyth Technologies, Inc. (United States)
Thomas W. Mossberg, LightSmyth Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 5225:
Nano- and Micro-Optics for Information Systems
Louay A. Eldada, Editor(s)

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