Liquid-crystal-based optical timedelay control system for wideband phased arrays

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dc.contributor.author Riza, Nabeel A.
dc.date.accessioned 2020-06-11T09:40:26Z
dc.date.available 2020-06-11T09:40:26Z
dc.date.issued 1993-02-26
dc.identifier.citation Riza, N. A. (1993) 'Liquid-crystal-based optical time-delay control system for wideband phased arrays', Proceedings of SPIE, 1790, Analog Photonics, Fibers '92, 1992, Boston, MA, United States, 26 February, doi: 10.1117/12.141715 en
dc.identifier.volume 1790 en
dc.identifier.startpage 171 en
dc.identifier.endpage 183 en
dc.identifier.issn 0277-786X
dc.identifier.issn 1996-756X
dc.identifier.uri http://hdl.handle.net/10468/10133
dc.identifier.doi 10.1117/12.141715 en
dc.description.abstract We introduce a novel, time delay-based, transmit-receive mode, remotely located, optical control system for wide instantaneous bandwidth phased arrays. Time delays are achieved using a cascade of free-space and fiber-based optical delay lines using bulk imaging optics for low complexity, two dimensional, free-space optical interconnects. High channel isolation, low insertion loss optical switching between delayed and undelayed paths is based on polarization switching using the low cost nematic liquid crystal arrays and polarizing beam splitters. The system allows for noise reduction via spatial and polarization filtering. A dual- channel time-multiplexed system arrangement is used to implement the fast (e.g., 200 beams/s) radar scan rates using the several millisecond response time nematic liquid crystals. en
dc.description.sponsorship General Electric (GE-CRD and GE-Aerospace) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Society of Photo-Optical Instrumentation Engineers (SPIE) en
dc.rights © 1993 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. en
dc.subject Phased array optics en
dc.subject Channel projecting optics en
dc.subject Polarization en
dc.subject Spatial light modulators en
dc.subject Control systems en
dc.subject Phased arrays en
dc.subject Integrated optics en
dc.title Liquid-crystal-based optical timedelay control system for wideband phased arrays en
dc.type Conference item en
dc.internal.authorcontactother Nabeel Riza, Electrical & Electronic Engineering, University College Cork, Cork, Ireland. +353-21-490-3000 Email: n.riza@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder General Electric en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Proceedings of SPIE en
dc.internal.conferencelocation Boston, MA, United States en
dc.internal.IRISemailaddress n.riza@ucc.ie en


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