PERTURBATION-THEORY OF A DOUBLY CLAD OPTICAL FIBER WITH A LOW-INDEX INNER CLADDING
PERTURBATION-THEORY OF A DOUBLY CLAD OPTICAL FIBER WITH A LOW-INDEX INNER CLADDING
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DOI：
10.1109/jqe.1975.1068578
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发表时间：
1975-01-01
影响因子：
2.5
通讯作者：
NISHIDA, S
中科院分区：
文献类型：
--
作者：
KAWAKAMI, S;NISHIDA, S
由纤芯、内包层和外包层组成的双包层光纤，当纤芯的折射率最大，内包层的折射率最小时，称为a型光纤。已知A型光纤具有优于常规单包层（SC）光纤的若干优点。本文给出了a型光纤的截止、漏波区的衰减常数和截止附近群速度的快速变化等的简单的封闭形式近似。在这种近似中，a型光纤被看作是SC光纤和外部扰动介质的组合系统。
A doubly clad optical fiber which is composed of the core, inner cladding, and outer cladding is called a-type fiber when the core has the largest index of refraction of the three and the inner cladding has the lowest. A-type fiber is known to have several advantages over a conventional singly clad (SC) fiber. This paper presents simple, closed form approximations of a-type fiber with respect to cutoff, the attenuation constant in the leaky wave region and a rapid change of the group velocity near cutoff, etc. In the approach to be described, a-type fiber is thought of as a combined system of an SC fiber and an outer perturbing medium.