Analysis of integrated acousto-optic modulators fabricated on 128-deg-rotated Y-cut X-propagation LiNbO3

Juntao Wang; Qun Han; Jiping Ning; Weiyi Zhang; Yang He

doi:10.1117/1.OE.51.7.074602

18 July 2012 Analysis of integrated acousto-optic modulators fabricated on 128-deg-rotated Y-cut X-propagation LiNbO3

Juntao Wang, Qun Han, Jiping Ning, Weiyi Zhang, Yang He

Author Affiliations +

Optical Engineering, Vol. 51, Issue 7, 074602 (July 2012). https://doi.org/10.1117/1.OE.51.7.074602

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.

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Juntao Wang, Qun Han, Jiping Ning, Weiyi Zhang, and Yang He "Analysis of integrated acousto-optic modulators fabricated on 128-deg-rotated Y-cut X-propagation LiNbO3," Optical Engineering 51(7), 074602 (18 July 2012). https://doi.org/10.1117/1.OE.51.7.074602

Published: 18 July 2012

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