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Proceedings Paper

Integrated quasi-collinear acousto-optic mode converter with weighted coupling
Author(s): Min Lv; Jianmin Cui; Wei Liu; Fang Cui; Yu-nan Sun
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Paper Abstract

In the paper, a weighted-coupling scheme of a SiO2 film-loaded Ti:LiNbO3 quasi-collinear integrated acousto-optic mode converter is reported, in which an angular offset between the acoustic and optical waveguides is introduced to implement an optimized Hamming weighted function for realization of ultralow sidelobe level. Acoustic wave guiding properties have been investigated for films such as SiO2, ZnO on LiNbO3 firstly. SiO2 film on LiNbO3 was selected as acoustic waveguide. With the mode analysis of the acoustic wave guide and the theory of coupling mode the limit of the width, weighted coupling coefficient and the characteristics of the conversion of acousto-optic modes are obtained. As the angle between acoustical and optical waveguides is 0.45°, the worst sidelobe level is -16dB and the theoretical values of bandwidths of -3dB and -10dB is 1.37nm and 2.31nm respectively, which have excelled the domestic reported level.

Paper Details

Date Published: 31 January 2005
PDF: 5 pages
Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); doi: 10.1117/12.570849
Show Author Affiliations
Min Lv, Beijing Institute of Technology (China)
Jianmin Cui, Beijing Institute of Technology (China)
Wei Liu, Beijing Institute of Technology (China)
Fang Cui, Beijing Institute of Technology (China)
Yu-nan Sun, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 5624:
Semiconductor and Organic Optoelectronic Materials and Devices
Chung-En Zah; Yi Luo; Shinji Tsuji, Editor(s)

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