摘要
为了从理论上求解光子晶体光纤的接续损耗问题,采用全矢量模型,计算了全反射式光子晶体光纤、高非线性光子晶体光纤的模场半径,给出了模场半径随空气孔间距、空气孔半径以及掺杂比例的变化关系,并在此基础上分析计算了光子晶体光纤与普通单模光纤的接续损耗,得到了理论上零损耗时的光子晶体光纤的模场半径。结果表明,模场失配是高非线性光子晶体光纤与普通单模光纤以及与一般全反射式光子晶体光纤接续损耗的最主要因素,合理的设计有望实现模场匹配,将接续损耗降到最小程度。
In order to solve the splice loss problem of photonic crystal fiber, the full vector model was adopted to calculate the mode field radius, air hole radius as well as its relation with doping concentration in total-internal-reflection fiber and high- nonlinearity fiber. Based on the results, the splice loss of photonic crystal fiber and single mode fiber was analyzed in detail. The calculation indicates that the mode-field unbalance is the main reason of splice loss for total-internal-reflection fibers and high- nonlinearity fibers. An appropriate modification of mode field match can reduce the splice loss to a minimum value.
出处
《激光技术》
CAS
CSCD
北大核心
2008年第3期302-304,共3页
Laser Technology
关键词
光纤光学
光子晶体光纤
接续损耗
全矢量模型
模场半径
fiber optics
photonic crystal fiber
splice loss
full vector model
mode field radius
