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Proceedings Paper

A novel silica-waveguide acousto-optic frequency shifter using ZnO piezoelectric films and its beam propagation analysis
Author(s): Chen Chen; BangRen Shi; LiJun Guo; Meng Zhao
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Paper Abstract

A novel silica-waveguide integrated acoustooptic frequency shifter (AOFS) with high diffraction efficiency is proposed for an optical wavelength of 1.55μm in this paper. Choose tapered silica waveguides fabricated on silicon substrates by PECVD and C-axis oriented ZnO piezoelectric films deposited using RF-sputtering as the interdigital transducer for the excitation of SAW. The interdigital Al electrodes are located at the interface between the nonpiezoelectric substrates (SiO2) and the ZnO piezoelectric films, that is, ZnO/IDT/SiO2 structure; when the ZnO films thickness h and SAW's wavelength Λ satisfy the relation h/Λ=0.4~0.5, electromechanical coupling coefficient of the interdigital transducer achieves the maximum value 17%. Diffraction properties are simulated and analyzed using beam propagation method (BPM) and AO interaction area is well-designed in order to obtain optimum interaction characteristics. The results show that a diffraction efficiency of approximately 70% can be obtained.

Paper Details

Date Published: 17 November 2010
PDF: 8 pages
Proc. SPIE 7847, Optoelectronic Devices and Integration III, 78472J (17 November 2010); doi: 10.1117/12.870154
Show Author Affiliations
Chen Chen, Changchun Univ. of Science and Technology (China)
BangRen Shi, Changchun Univ. of Science and Technology (China)
LiJun Guo, Changchun Univ. of Science and Technology (China)
Meng Zhao, Changchun Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 7847:
Optoelectronic Devices and Integration III
Xuping Zhang; Hai Ming; Alan Xiaolong Wang, Editor(s)

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