An optimization method of the spot-size converter

Yubo Li; Xihua Li; Jianyi Yang; Qiang Zhou; Xiaoqing Jiang; Minghua Wang

doi:10.1117/12.576421

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10 January 2005 An optimization method of the spot-size converter

Yubo Li; Xihua Li; Jianyi Yang; Qiang Zhou; Xiaoqing Jiang; Minghua Wang

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Proceedings Volume 5623, Passive Components and Fiber-based Devices; (2005) https://doi.org/10.1117/12.576421
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

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.

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Yubo Li, Xihua Li, Jianyi Yang, Qiang Zhou, Xiaoqing Jiang, and Minghua Wang "An optimization method of the spot-size converter", Proc. SPIE 5623, Passive Components and Fiber-based Devices, (10 January 2005); https://doi.org/10.1117/12.576421

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