Small-size taper design based on fourth-order Bezier curve

Zhe Han; Yan Qi; Yu Wang; Boxia Yan; Yanwei Wang; Yuanyuan Fan; Mou Bai

doi:10.1117/12.2590740

18 March 2021 Small-size taper design based on fourth-order Bezier curve

Zhe Han, Yan Qi, Yu Wang, Boxia Yan, Yanwei Wang, Yuanyuan Fan, Mou Bai

Proceedings Volume 11780, Global Intelligent Industry Conference 2020; 117801N (2021) https://doi.org/10.1117/12.2590740
Event: Global Intelligent Industry Conference 2020, 2020, Guangzhou, China

Abstract

Taper is a basic device widely used in photonics technology which transmits light between the waveguides with different widths. Tapers are usually designed to be trapezoidal in shape, which is simple but has many limits. If the taper is designed to be too short, the broken lines at the junction positions between the strip waveguides (SWGs) and the taper will excite high-order modes and cause high fundamental mode loss. As a result, the traditional tapers are always with a long length which limits the miniaturization of photonic systems. To solve this problem, we proposed a method based on forth-order Bezier curve that made the taper has both small size and good performances on the transmission loss of fundamental mode and the mode excitation ratios (MERs) of high-order modes. According to the obtained results, the proposed Bezier curve method decreased the length of a taper from 100μm to 30μm on the premise of maintaining the performances.

Citation Download Citation

Zhe Han, Yan Qi, Yu Wang, Boxia Yan, Yanwei Wang, Yuanyuan Fan, and Mou Bai "Small-size taper design based on fourth-order Bezier curve", Proc. SPIE 11780, Global Intelligent Industry Conference 2020, 117801N (18 March 2021); https://doi.org/10.1117/12.2590740

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