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Proceedings Paper

Optical routing system consisting of spatial light modulator and kinoform phase gratings
Author(s): Deug Ju Lee; Nam Kim; Seok Ho Song; HoHyung Suh
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Paper Abstract

Dynamic free-space optical routing system is experimented by a holographic crossbar with single-stage switching architecture. For dynamic operation, electrically addressed liquid- crystal spatial light modulator and diffraction gratings are used in place of passive holograms. Diffraction gratings are consisted of regular cells and have multiple phase delays. This pixelated kinoform phase grating array displayed on SLM deflects a input beam toward a wanted direction or splits a input beam into many beams and then steers them to desired positions. Each grating array is combined with three periods of grating which is constructed by 32 X 32 pixels with equally space phase levels. This system has higher efficiencies and superior characteristics of beam split, and produces asymmetric output beam pattern. In this system, input ports are 3 X 3 and output ports are 5 X 5. It operates at high speed as dynamic free-space optical switch and leads low optical losses.

Paper Details

Date Published: 7 May 1996
PDF: 5 pages
Proc. SPIE 2689, Diffractive and Holographic Optics Technology III, (7 May 1996); doi: 10.1117/12.239634
Show Author Affiliations
Deug Ju Lee, Chungbuk National Univ. (South Korea)
Nam Kim, Chungbuk National Univ. (South Korea)
Seok Ho Song, Hanyang Univ. (South Korea)
HoHyung Suh, Electronics and Telecommunications Research Institute (South Korea)

Published in SPIE Proceedings Vol. 2689:
Diffractive and Holographic Optics Technology III
Ivan Cindrich; Sing H. Lee, Editor(s)

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