Strain-induced phase-matching and tunability of acoustic gratings in fibers

Citation
A. Diez et al., Strain-induced phase-matching and tunability of acoustic gratings in fibers, APPL PHYS L, 79(9), 2001, pp. 1390-1392
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
0003-6951 → ACNP
Volume
79
Issue
9
Year of publication
2001
Pages
1390 - 1392
Database
ISI
SICI code
0003-6951(20010827)79:9<1390:SPATOA>2.0.ZU;2-D
Abstract
We study the effect of strain on the properties of a one-dimensional acoust ic grating: a tapered optical fiber with a periodically varying diameter. I ts spectral response has a strong frequency stop band for flexural waves. C hanging the tension of the fiber changes the wave velocity, and so modifies the acoustic response of the grating. The resulting tunability of the stop band over a wide frequency range is demonstrated experimentally. Furthermo re, the stop band can almost disappear completely due to a strain-induced p hase-matching phenomenon. Such structures are suitable as frequency-selecti ve acoustic mirrors in acousto-optic fiber devices. (C) 2001 American Insti tute of Physics.