| Experimental comparison of performance degradation from terahertz and infrared wireless links in fog. | |
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MedLine Citation:
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PMID: 22330363 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We describe a lab setup for analyzing impairments of terahertz (THz) and infrared (IR) free space links caused by local refraction index changes in the signal's propagation paths that could be induced by turbulence, particles, humidity, etc. A THz signal comprising a 2.5 Gb/s data load modulated on a carrier at 625 GHz, is launched through a weather emulating chamber, detected, and its performance analyzed. An IR beam at 1.5 um wavelength carrying the same data load is superposed with the THz beam, propagating through the same weather conditions and also performance analyzed. We modulate the IR channel with a usual non-return-to-zero (NRZ) format but use duobinary coding for driving our THz source, which enables signaling at high data rate and higher output power. As both beams pass through the same channel perturbations and as their degradations are recorded simultaneously we can simultaneously compare the weather impact on both. We investigate scintillation and fog attenuation effects for the THz and IR signals by measuring bit error rates (BER), signal power, and phase front distortions. |
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Authors:
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Ke Su; Lothar Moeller; Robert B Barat; John F Federici |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the Optical Society of America. A, Optics, image science, and vision Volume: 29 ISSN: 1520-8532 ISO Abbreviation: J Opt Soc Am A Opt Image Sci Vis Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-02-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9800943 Medline TA: J Opt Soc Am A Opt Image Sci Vis Country: United States |
Other Details:
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Languages: eng Pagination: 179-84 Citation Subset: IM |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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