000088868 001__ 88868
000088868 005__ 20180317093507.0
000088868 022__ $$a0924-4247
000088868 02470 $$2ISI$$aA1997YA75200012
000088868 037__ $$aARTICLE
000088868 245__ $$aElectrical characterization of sputter-deposited ZnO coatings on optical fibers
000088868 260__ $$c1997
000088868 269__ $$a1997
000088868 336__ $$aJournal Articles
000088868 500__ $$aFox, GR Ecole Polytech Fed Lausanne,Lab Ceram,Ch-1015 Lausanne,Switzerland
000088868 500__ $$aYa752
000088868 500__ $$aTimes Cited:2
000088868 500__ $$aCited References Count:14
000088868 520__ $$aPiezoelectric ZnO coatings on optical fibers are of interest for active optical-fiber devices such as phase and wavelength modulators. Reactive magnetron sputtering has been used to prepare high-resistivity [001] radially oriented ZnO coatings on 85 mm long sections of Cr/Au-coated optical fibers. The impedance spectra of 2 and 6 mm long transducers are analyzed between 1 kHz and 100 MHz by applying an electrical potential across the thickness of the ZnO coating. The capacitance of these devices exhibits a logarithmic frequency dispersion and a nearly constant dielectric loss of 0.006 +/- 0.002 between 1 and 100 kHz. Two radial-mode piezoelectric resonances, the first at approximately 22 MHz and the second at 66 MHz, are identified. The thickness distribution of the ZnO coating, which results from the magnetron sputter-deposition process, introduces parabolic dependencies of the capacitance and resonance frequencies of elements placed at different positions along the length of the fiber. Identification of the radial-mode resonances and the effects of ZnO thickness gradients on the piezoelectric resonances are made possible by the occurrence of the ZnO thickness distribution. Thickness-induced changes of the piezoelectric resonance frequencies also allow the observation of an 'inversion' of the resonance response for resonances that occur above the LCR resonance. (C) 1997 Elsevier Science S.A.
000088868 6531_ $$azinc oxide
000088868 6531_ $$apiezoelectric thin films
000088868 6531_ $$apiezoelectric optical-fiber coatings
000088868 6531_ $$aradial resonance
000088868 6531_ $$areactive sputtering
000088868 6531_ $$aoptical phase modulator
000088868 6531_ $$aphase modulators
000088868 700__ $$aFox, G. R.
000088868 700__ $$0240215$$aDamjanovic, D.$$g104860
000088868 773__ $$j63$$k2$$q153-160$$tSensors and Actuators a-Physical
000088868 909CO $$ooai:infoscience.tind.io:88868$$particle$$pSTI
000088868 909C0 $$0252012$$pLC$$xU10334
000088868 937__ $$aLC-ARTICLE-1997-009
000088868 970__ $$a74/LC
000088868 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000088868 980__ $$aARTICLE