Hindering effect of the core-cladding interface in thermally poled optical fibers.
Hindering effect of the core-cladding interface in thermally poled optical fibers.
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DOI：
10.1364/ao.54.005771
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发表时间：
2015-06
期刊：
影响因子：
1.9
通讯作者：
Lin Huang;G. Ren;Yixiao Gao;B. Zhu;Xiaomeng Sun
中科院分区：
文献类型：
--
作者：
Lin Huang;G. Ren;Yixiao Gao;B. Zhu;Xiaomeng Sun
本文基于二维电荷动力学模型研究了热极化光纤中纤芯-包层界面（CCI）的阻碍效应。介绍了 CCI 处载流子的迁移率以及纤芯中载流子的迁移率和浓度对热极化过程的影响。研究发现，CCI 处电荷载流子的较低迁移率是造成 CCI 阻碍效应的原因。 CCI 的阻碍作用可以通过增加纤芯中电荷载流子的迁移率和浓度来增强，或者通过降低纤芯中钠离子的迁移率和浓度来克服，这可以增加传播模式中的 χ(2)。这些结果为阻碍效应的潜在机制提供了理论见解，并可能在热极化光波导和多层结构中找到应用。
In this paper, the hindering effect of the core-cladding interface (CCI) in thermally poled optical fiber is investigated based on the two-dimensional charge dynamics model. The influence of the mobility of charge carriers at the CCI, and the mobility and concentration of charge carriers in the fiber core on the thermal poling process is presented. It is found that lower mobility of charge carriers at the CCI is responsible for the hindering effect of the CCI. The hindering effect of the CCI could either be enhanced by increasing the mobility and concentration of charge carriers in the fiber core or be overcome by decreasing the mobility and concentration of sodium ions in the fiber core, which could increase the χ(2) in propagation mode. The results provide theoretical insight into the underlying mechanism of the hindering effect and may find applications in thermal poling optical waveguides and multilayered structures.