A theoretical analysis of refractive-index grating waveguide structures for integrated optics

Based upon equivalent transmission line method, a perturbation analysis on the guiding properties of refractive-index gratings is presented. By numerical calculation, the leakage parameter α which influences the leakage energy into the diffracted orders due to the grating scatter, is achieved as fun...

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Bibliographic Details
Published in:Optics and laser technology 2007-11, Vol.39 (8), p.1522-1527
Main Authors: Dong, Yi, Sun, Yuming, Li, Yufei, Yu, Xiaoqiang, Hou, Xueyuan
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated optics. Optical fibers and wave guides
Leakage parameter
Optical and optoelectronic circuits
Planar waveguide
Refractive-index gratings
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Summary:Based upon equivalent transmission line method, a perturbation analysis on the guiding properties of refractive-index gratings is presented. By numerical calculation, the leakage parameter α which influences the leakage energy into the diffracted orders due to the grating scatter, is achieved as functions of the grating period, thickness of the waveguide and index modulation Δ n. Our results reveal that, although the index modulation Δ n is much less than that of the etched or deposited grating, refractive-index gratings can still reach a high leakage parameter because of the prominent increase of the grating height.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2007.01.002