FIBER OPTICS

Novel piezoelectric actuators for tuning an optical fiber Bragg grating

[+] Author Affiliations
Sidney G. Allison

NASA Langley Research Center, Nondestructive Evaluation Sciences Branch, Mail Stop 231, Hampton, Virginia?23681-2199 E-mail: s.g.allison@larc.nasa.gov

Robert L. Fox

NASA Langley Research Center, Technology Development & Integration Branch, Mail Stop 390, Hampton, Virginia?23681-2199

Mark E. Froggatt

Luna Technologies, Inc., 2020 Craft Drive, Suite 2000, Blacksburg, Virginia 24060

Brooks A. Childers

Luna Innovations, Inc., 2851 Commerce Street, Blacksburg, Virginia?24060

Opt. Eng. 41(10), 2448-2455 (Oct 01, 2002). doi:10.1117/1.1504723
History: Received June 26, 2001; Revised Feb. 27, 2002; Accepted Mar. 6, 2002; Online September 20, 2002
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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, tunable fiber laser is ideal for demodulating strain in optical fiber Bragg gratings (FBGs) attached to smart structures such as the reusable launch vehicle that is being developed by NASA. A method is presented for stretching optical fibers using the thin-layer composite unimorph ferroelectric driver and sensor (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 FBG is presented. Means of adapting THUNDER actuators for stretching optical fibers are discussed, including ferrules, ferrule clamp blocks, and plastic hinges made with stereo lithography. © 2002 Society of Photo-Optical Instrumentation Engineers.

© 2002 Society of Photo-Optical Instrumentation Engineers

Citation

Sidney G. Allison ; Robert L. Fox ; Mark E. Froggatt and Brooks A. Childers
"Novel piezoelectric actuators for tuning an optical fiber Bragg grating", Opt. Eng. 41(10), 2448-2455 (Oct 01, 2002). ; http://dx.doi.org/10.1117/1.1504723


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