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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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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creator Dong, Yi
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description 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.
doi_str_mv 10.1016/j.optlastec.2007.01.002
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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
title A theoretical analysis of refractive-index grating waveguide structures for integrated optics
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