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首页> 外文期刊>IEE Proceedings. Part J >Fabrication tolerances in fibre directional couplers designed to maximise coupling between fibres and diode lasers
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Fabrication tolerances in fibre directional couplers designed to maximise coupling between fibres and diode lasers

机译:光纤定向耦合器的制造公差旨在最大化光纤和二极管激光器之间的耦合

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摘要

A fibre directional coupler is described that comprises one fibre with a circular core coupled to one with a suitable rectangular core, which makes it possible in principle to couple 100% of the output of a semiconductor laser or laser amplifier into a single-mode communications fibre, and vice versa. The manufacture of such a coupler depends critically on the control of dimensions, because of the differing dispersion characteristics of the two fibres. This coupler was modelled using a finite element program in a preliminary attempt to study dimensional tolerances, with a view to optimising its design. Calculations are presented of the beatlength as a function of the sizes and the refractive indices of the two cores comprising the coupler, together with estimates of the dimensional tolerances, giving coupling losses under 1 dB.
机译:描述了一种光纤定向耦合器,该光纤定向耦合器包括具有圆形芯的一根光纤与具有合适矩形芯的一根光纤耦合,这原则上可以将半导体激光器或激光放大器的输出的100%耦合到单模通信光纤中。 ,反之亦然。由于两种纤维的色散特性不同,这种耦合器的制造关键取决于尺寸的控制。在初步研究尺寸公差的过程中,使用有限元程序对该耦合器进行了建模,以优化其设计。给出了节拍长度随组成耦合器的两个芯的尺寸和折射率的函数的计算结果,以及尺寸公差的估计值,给出了低于1 dB的耦合损耗。

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