Integrated Optics

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

[+] Author Affiliations
Juntao Wang

Tianjin University, College of Precision Instrument and Optoelectronics Engineering, and Optoelectronic Information Science and Technology Laboratory, The State Ministry of Education, 300072, Tianjin, China

Qun Han

Tianjin University, College of Precision Instrument and Optoelectronics Engineering, and Optoelectronic Information Science and Technology Laboratory, The State Ministry of Education, 300072, Tianjin, China

Jiping Ning

Tianjin University, College of Precision Instrument and Optoelectronics Engineering, and Optoelectronic Information Science and Technology Laboratory, The State Ministry of Education, 300072, Tianjin, China

Weiyi Zhang, Yang He

Tianjin University, College of Precision Instrument and Optoelectronics Engineering, and Optoelectronic Information Science and Technology Laboratory, The State Ministry of Education, 300072, Tianjin, China

Opt. Eng. 51(7), 074602 (Jul 18, 2012). doi:10.1117/1.OE.51.7.074602
History: Received May 9, 2012; Revised June 19, 2012; Accepted June 21, 2012
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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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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

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", Opt. Eng. 51(7), 074602 (Jul 18, 2012). ; http://dx.doi.org/10.1117/1.OE.51.7.074602


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