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Proceedings Paper

Fiber optic Bragg grating true-time-delay generator for broadband rf applications
Author(s): Michael G. Wickham; Lawrence J. Lembo; Lawrence A. Dozal; John C. Brock
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Paper Abstract

A fiber-optic approach for low-loss true time delay of wideband RF signals for phased-array-antenna beamsteering is presented. An optical carrier modulated by the RF signal of interest is launched into a delay-line fiber composed of optical Bragg reflection gratings written holographically into the core of a single-mode fiber. The desired beam steering is realized by tuning the optical carrier wavelength for reflection from the appropriate grating. Radiation testing of various fibers with Bragg gratings has been performed indicating preferable fiber types. True time delay offers much reduced beam squint and sharper antenna superior nulling compared to phase shift scanned antenna. Examples of applications of this concept showing its advantages are presented.

Paper Details

Date Published: 22 November 1996
PDF: 7 pages
Proc. SPIE 2844, Photonics and Radio Frequency, (22 November 1996); doi: 10.1117/12.259002
Show Author Affiliations
Michael G. Wickham, TRW, Inc. (United States)
Lawrence J. Lembo, TRW, Inc. (United States)
Lawrence A. Dozal, TRW, Inc. (United States)
John C. Brock, TRW, Inc. (United States)

Published in SPIE Proceedings Vol. 2844:
Photonics and Radio Frequency
Brian M. Hendrickson, Editor(s)

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