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Optical Engineering

Thermal stability analysis of nonlinear optical switch based on asymmetric three-core nonlinear directional coupler with variable Gaussian coupling coefficient
Author(s): Qing Tao; Fengguang Luo; Lei Cao; Jian Hu; Dusi Cai; Zhengwen Wan; Jinxing Zhang; Zhihua Yu
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Paper Abstract

We analyze the thermal stability of the power transmission efficiency and the extinction ratio in an asymmetric three-core silicon-on-insulator nonlinear directional coupler with variable Gaussian coupling coefficient. Because the refractive indices of Si and SiO2 materials are subject to temperature change, the effective refractive index of the nonlinear coupler varies correspondingly. When ratio (LC/b) and ΔT change, the relative transmission efficiency error (Δ) values and relative change of extinction ratio (η) values are obtained. It can be easily shown that variation of Δ and η are negligible under LC/b ≤ 1/2. Therefore, we can set LC/b ≤ 1/2 and ΔT ∈ [-100 K, 100 K] in order to make the power transmission efficiency and the extinction ratio work steadily. This is significant in guiding an actual nonlinear optical pulse switch fabrication.

Paper Details

Date Published: 1 July 2011
PDF: 5 pages
Opt. Eng. 50(7) 071104 doi: 10.1117/1.3558853
Published in: Optical Engineering Volume 50, Issue 7
Show Author Affiliations
Qing Tao, Huazhong Univ. of Science and Technology (China)
Fengguang Luo, Huazhong Univ. of Science and Technology (China)
Lei Cao, Huazhong Univ. of Science and Technology (China)
Jian Hu, Huazhong Univ. of Science and Technology (China)
Dusi Cai, Huazhong Univ. of Science and Technology (China)
Zhengwen Wan, Huazhong Univ. of Science and Technology (China)
Jinxing Zhang, Huazhong Univ. of Science and Technology (China)
Zhihua Yu, Huazhong Univ. of Science and Technology (China)


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