Deposition of coatings on long-period fiber gratings: tunnel effect analogy

被引：20

作者：

Del Villar, I. ^{[1
]}

Matias, I. R. ^{[1
]}

Arregui, F. J. ^{[1
]}

机构：

[1] Univ Publ Navarra, Dept Ingn Elect & Elect, Pamplona 31006, Spain

来源：

OPTICAL AND QUANTUM ELECTRONICS | 2006年 / 38卷 / 08期

关键词：

gratings; coupled-mode analysis; thin films; optical fiber sensors;

D O I：

10.1007/s11082-006-9002-3

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The sensitivity of Long-period fiber gratings (LPFGs), coated with high-refractive-index thin film overlays, to the refractive index and the thickness of the overlay, and to the ambient refractive index, can be enhanced with a design based on a two-overlay coating of an LPFG. The first overlay of lower refractive index than the cladding affects the guidance of a cladding mode in the second overlay of higher refractive index than the cladding. This causes a more abrupt cladding modal redistribution than with the deposition of a unique high-refractive-index overlay. The phenomenon is analyzed with a method based on a vectorial analysis of modes and the application of coupled mode theory.

引用

页码：655 / 665

页数：11

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