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Proceedings Paper

Design and analysis of waveguide grating coupling with gradually changing periods for optical interconnection
Author(s): Xianghua Feng; Jiarong Ji; Wenhua Dou
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Paper Abstract

Waveguide grating couplers with gradually changing periods has good focusing effect to diffraction light; it can provide a compact, efficient coupling mechanism for optical interconnection. In this paper, a polymer waveguide grating couple to vertically couple and focusing for optical interconnection is proposed and designed. In order to estimate the coupling performance of the proposed coupler, the diffraction characteristics of a focusing waveguide grating coupler with gradually changing periods as an in/out-of-plane couple are investigated. The coupling efficiency and the intensities of the diffracted beams as functions of the grating groove depth are analyzed by solving the Helmholtz equation and the method of transfer-matrix. Their corresponding numerical simulation results are given. The grating periodicity fulfilling -1 order diffraction is designed, and excitation direction is calculated. With the optimized structure parameters showing the high coupling performance, the design of a waveguide grating coupling to vertically couple and focusing simultaneous for optical interconnection is obtained.

Paper Details

Date Published: 17 November 2010
PDF: 12 pages
Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 784823 (17 November 2010); doi: 10.1117/12.869680
Show Author Affiliations
Xianghua Feng, National Univ. of Defense Technology (China)
Information Engineering Univ. (China)
Jiarong Ji, National Univ. of Defense Technology (China)
Wenhua Dou, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 7848:
Holography, Diffractive Optics, and Applications IV
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

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