熔锥型光纤耦合器的模型研究

应用科学学报 ›› 1995, Vol. 13 ›› Issue (1): 14-20.

熔锥型光纤耦合器的模型研究

顾炳生, 章介伦, 沈文达, 李青宁

上海大学嘉定校区

收稿日期:1992-12-14 修回日期:1993-06-21 出版日期:1995-03-31 发布日期:1995-03-31

MODEL RESEARCH OF THE FUSED TAPERED OPTICAL FIBER COUPLERS

GU BIXGSHENG, ZHANG JIALUN, SHEN WENDA, LI QINGNING

Shanghai University, Jiading Campus

Received:1992-12-14 Revised:1993-06-21 Online:1995-03-31 Published:1995-03-31

摘要/Abstract

摘要： 用理论分析证明了宽频带熔锥型单模光纤耦合器的原始模型,简化成有效平行波导的近似模型,必须作弱导近似和弱耦合近似。文中根据自制熔锥耦合器的实验,以及对其参数和截面尺寸测量及计算,表明具有哑铃形腰部横截面结构的宽频带熔锥型耦合器的组合波导满足弱导近似和弱耦近似条件。用有效平行波导的近似模型,计算耦合器转换功率随波长变化曲线,不仅宽频带特性的理论曲线与实验符合得较好,而且耦合器的耦合特性对两光纤芯径比及熔锥长度变化十分灵敏,这也与实验相符.

关键词: 熔锥型, 光纤耦合器, 弱耦, 近以模型, 弱导

Abstract: We Proved theoretically that the week guiding and weak coupling approximatlon must be untilized when our approximate parallel waveguide model takes the place of the original model of the fused tapered wide band coupler.According to the experiment on the weakly fused tapered coupler developed by us,we obtained that the fused tapered wide band coupler with a shape of dumb-bell satisfied the weak guiding and weak coupling conditions.Furthermore,according to the curve of the translation power versus the wavelenth,we obtained that not only the theoretical curve reflecting the wide band characteristic matched well with the experiment curve,but the coupling characteristic was very sensitive to the ratio of two fiber cores and fused length,a fact identical with the practical result.

Key words: fused tapered fiber coupler, coupling, weak guiding weak, simple model

顾炳生, 章介伦, 沈文达, 李青宁. 熔锥型光纤耦合器的模型研究[J]. 应用科学学报, 1995, 13(1): 14-20.

GU BIXGSHENG, ZHANG JIALUN, SHEN WENDA, LI QINGNING. MODEL RESEARCH OF THE FUSED TAPERED OPTICAL FIBER COUPLERS[J]. Journal of Applied Sciences, 1995, 13(1): 14-20.