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Proceedings Paper

An optimization method of the spot-size converter
Author(s): Yubo Li; Xihua Li; Jianyi Yang; Qiang Zhou; Xiaoqing Jiang; Minghua Wang
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Paper Abstract

Single mode tapered waveguide (spot-size converter) can transmit the optical field with low loss. The less loss is very important for highly integrating optic devices. For the integrating optic device use the weak waveguide in order to keep the small ellipse field, like 2-3um. But standard single mode fiber has a large diameter like 9-11um, and a round field. If we want to get the effective coupling, the spot-size converter must be used. These kinds of spot-size converter waveguide are designed so that the effective values of the normalized frequency are nearly the same everywhere and the shape of the mode field is basically kept Gauss. Then it can get the low loss coupling between the integrated waveguide and fiber with Gauss field.[1] In this paper, an optimal method was used to find the lateral of the spot-size converter after give both the end size. It must point out that this paper's conclusion is just the theoretical computation conclusion. In general, the BPM method can be used to design the low loss tapered waveguide. In this paper, under the background of FD-BPM method, the neural network' nonlinear property was used to find the optimal low loss boundary of the taper waveguide through the net learning. This paper describes a process of design a waveguide spot-size converter lateral side. After the process, the spot-size converter waveguide can get low radiation loss and coupling in highly effect. And the paper also presents a method for finding the optimal boundary of the SSCs.

Paper Details

Date Published: 10 January 2005
PDF: 8 pages
Proc. SPIE 5623, Passive Components and Fiber-based Devices, (10 January 2005); doi: 10.1117/12.576421
Show Author Affiliations
Yubo Li, Zhejiang Univ. (China)
Xihua Li, Zhejiang Univ. (China)
Jianyi Yang, Zhejiang Univ. (China)
Qiang Zhou, Zhejiang Univ. (China)
Xiaoqing Jiang, Zhejiang Univ. (China)
Minghua Wang, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 5623:
Passive Components and Fiber-based Devices
Yan Sun; Shuisheng Jian; Sang Bae Lee; Katsunari Okamoto, Editor(s)

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