Sensitivity characteristics near the dispersion turning points of long-period fiber gratings in B/Ge codoped fiber

被引：57

作者：

Shu, XW ^{[1
]}

Zhang, L ^{[1
]}

Bennion, I ^{[1
]}

机构：

[1] Aston Univ, Photon Res Grp, Birmingham B4 7ET, W Midlands, England

来源：

OPTICS LETTERS | 2001年 / 26卷 / 22期

关键词：

D O I：

10.1364/OL.26.001755

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a theoretical and experimental investigation of the dispersion property of long-period fiber gratings in B/Ge codoped fiber. A novel concept of a mode ultrasensitive zone defined by a region in which the phase-matching conditions are close to the dispersion turning points is proposed. The transition from a dual-resonance state to a dispersion turning point is revealed for a set of ultrasensitive-zone gratings during the UV-writing process. We explore the sensitivity characteristics near the dispersion turning points, with the aim of implementing two types of temperature sensor with sensitivity 2 orders of magnitude higher than that of the conventional long-period gratings. (C) 2001 Optical Society of America.

引用

页码：1755 / 1757

页数：3

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