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Proceedings Paper

Tailoring of the Brillouin gain profile for fiber-based sensor systems and networks
Author(s): Peter D. Dragic
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Paper Abstract

We outline a design procedure and show some resulting Brillouin-tailored optical fibers for use in fiber-based sensor systems and networks. Brillouin scattering can be utilized, for example, in distributed temperature sensors. However, it can also be detrimental, such as when high power per-unit-bandwidth is propagated over long distances. Based on models we have developed, several Brillouin-tailored fibers were designed and manufactured, each potentially targeting a unique application. For example, a fiber was designed and fabricated that operates with two Brillouin frequencies that have been gain-equalized to within 0.5 dB, and a frequency difference of 175 MHz. Temperature sensing may be accomplished by the direct detection of the beat frequency between the two Stokes' lines. In another example, an optical fiber was designed and fabricated with eight acoustic modes that have all been Brillouin gain-equalized to within 3 dB, over a frequency span of nearly 1 GHz. In another example, fiber optic sensors that require the propagation of narrow linewidth signals over longer distances are limited by Stimulated Brillouin Scattering (SBS). A fiber has been designed and fabricated that has a Brillouin-threshold that is increased by > 10 dB relative to traditional fibers with the same optical mode size.

Paper Details

Date Published: 27 April 2009
PDF: 10 pages
Proc. SPIE 7316, Fiber Optic Sensors and Applications VI, 731607 (27 April 2009); doi: 10.1117/12.818817
Show Author Affiliations
Peter D. Dragic, Neolight Technologies LLC (United States)

Published in SPIE Proceedings Vol. 7316:
Fiber Optic Sensors and Applications VI
Eric Udd; Henry H. Du; Anbo Wang, Editor(s)

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