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Optical Engineering

Analysis of integrated acousto-optic modulators fabricated on 128-deg-rotated Y-cut X-propagation LiNbO3
Author(s): Juntao Wang; Qun Han; Jiping Ning; Weiyi Zhang; Yang He
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Paper Abstract

The efficiency of integrated acousto-optic (AO) modulators with different optical penetration depths fabricated on 128-deg-rotated Y-cut X-propagation lithium niobate (128-deg YX-LiNbO3) is analyzed theoretically for the first time by determining the overlap integral between the optical and acoustic field distribution. The results show that the smaller the optical penetration depth is, the higher the optimum surface-acoustic-wave (SAW) frequency and diffraction efficiency and the larger the bandwidth will be. Compared with TM-polarized light, TE-polarized light offers better performance for modulation. However, for a well-concentrated optical waveguide, TM-polarized light is attractive for AO modulators, which employ a single SAW.

Paper Details

Date Published: 18 July 2012
PDF: 5 pages
Opt. Eng. 51(7) 074602 doi: 10.1117/1.OE.51.7.074602
Published in: Optical Engineering Volume 51, Issue 7
Show Author Affiliations
Juntao Wang, Tianjin Univ. (China)
Qun Han, Tianjin Univ. (China)
Jiping Ning, Tianjin Univ. (China)
Weiyi Zhang, Tianjin Univ. (China)
Yang He, Tianjin Univ. (China)

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