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Proceedings Paper

Numerical analysis of multimode interference effect in Ti:LiNbO3 waveguides
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Paper Abstract

The self-image effects of the multi-port multimode couplers based on weakly guided graded Ti:LiNbO3 optical waveguides are analyzed through the three dimensional (3D) full-vector beam propagation method (FVBPM). By applying the perfect matching layer (PML) boundary condition, we can efficiently calculate the various performances such as insertion loss, crosstalk, and power splitting ratio of the multimode couplers. Through this model, the effect of the design and fabrication parameters such as the thickness and width of the Ti-strip and diffusion time and temperature on performances of the multimode couplers can be easily investigated. By comparing with traditional MMI couplers based on step-index optical waveguides, some salient features are observed and the related design rules should be revised. Finally, some related issues such as the bending loss and high order modes are discussed.

Paper Details

Date Published: 12 October 2005
PDF: 11 pages
Proc. SPIE 5970, Photonic Applications in Devices and Communication Systems, 59700W (12 October 2005); doi: 10.1117/12.628718
Show Author Affiliations
Lin-Ping Shen, Apollo Inc. (Canada)
Hua Wang, McMaster Univ. (United States)
Chenglin Xu, McMaster Univ. (United States)
Wei-Ping Huang, McMaster Univ. (United States)

Published in SPIE Proceedings Vol. 5970:
Photonic Applications in Devices and Communication Systems
Peter Mascher; John C. Cartledge; Andrew Peter Knights; David V. Plant, Editor(s)

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