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Proceedings Paper

THUNDER piezoelectric actuators as a method of stretch-tuning an optical fiber grating
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Paper Abstract

A method of stretching optical fiber holds interest for measuring strain in smart structures where the physical displacement may be used to tune optical fiber lasers. A small, lightweight, low power tunable fiber laser is ideal for demodulating strain in optical fiber Bragg gratings attached to smart structures such as the re-usable launch vehicle that is begin developed by NASA. A method is presented for stretching optical fibers using the THUNDER piezoelectric actuators invented at NASA Langley Research Center. THUNDER actuators use a piezoelectric layer bonded to a metal backing to enable the actuators to produce displacements larger than the unbonded piezoelectric material. The shift in reflected optical wavelength resulting from stretching the fiber Bragg grating is presented. Means of adapting THUNDER actuators for stretching optical fibers is discussed, including ferrules, ferrule clamp blocks, and plastic hinges made with stereo lithography.

Paper Details

Date Published: 12 June 2000
PDF: 10 pages
Proc. SPIE 3991, Smart Structures and Materials 2000: Industrial and Commercial Applications of Smart Structures Technologies, (12 June 2000); doi: 10.1117/12.388148
Show Author Affiliations
Sidney G. Allison, NASA Langley Research Ctr. (United States)
Robert Lee Fox, NASA Langley Research Ctr. (United States)
Mark E. Froggatt, NASA Langley Research Ctr. (United States)
Brooks A. Childers, NASA Langley Research Ctr. (United States)


Published in SPIE Proceedings Vol. 3991:
Smart Structures and Materials 2000: Industrial and Commercial Applications of Smart Structures Technologies
Jack H. Jacobs, Editor(s)

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