Novel long-period fiber gratings written by high-frequency CO2 laser pulses and applications in optical fiber communication

被引：78

作者：

Rao, YJ ^{[1
]}

Zhu, T ^{[1
]}

Ran, ZL ^{[1
]}

Wang, YP ^{[1
]}

Jiang, J ^{[1
]}

Hu, AZ ^{[1
]}

机构：

[1] Chongqing Univ, Dept Optoelect Engn, Chongqing 400044, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2004年 / 229卷 / 1-6期

基金：

中国国家自然科学基金;

关键词：

optical fiber DWDM communication systems; long-period fiber gratings; Er-doped optical fiber amplifiers; ASE noise filters; dynamic gain equalizers;

D O I：

10.1016/j.optcom.2003.10.048

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we report novel long-period fiber gratings (LPFGs) fabricated by using a new writing technique that is mainly based on the thermal shock effect of focused high-frequency CO2 laser pulses at several kHz. Several unique characteristics of these LPFGs, such as bend and transverse-load, etc., are observed by experiments, for the first time, to our knowledge. These unique features of the LPFGs are mainly due to the asymmetrical distribution of the refractive index on the cross-section of the LPFG induced by high-frequency CO2 laser pulses. Based on these novel LPFGs, an amplified spontaneous emission noise filter and a gain equalizer have been demonstrated for the noise figure reduction and the gain spectrum flattening of Er-doped fiber amplifiers (EDFAs), respectively. By means of the unique bending and loading features of the LPFG, two tunable gain equalizers have been demonstrated for dynamic gain flattening of EDFAs. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：209 / 221

页数：13

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