Characteristics of novel long-period fibre gratings written by focused high-frequency CO2 laser pulses

被引：28

作者：

Rao, YJ ^{[1
]}

Wang, YP ^{[1
]}

Ran, ZL ^{[1
]}

Zhu, T ^{[1
]}

Yu, BM ^{[1
]}

机构：

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

来源：

APOC 2001: ASIA-PACIFIC OPTICAL AND WIRELESS COMMUNICATIONS, PASSIVE COMPONENTS AND TRANSMISSION SYSTEMS | 2001年 / 4581卷

关键词：

optical fiber gratings; optical fiber amplifiers; band-rejection filters;

D O I：

10.1117/12.445056

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：

In this paper, we report novel long-period fiber gratings (LPFGs) fabricated by using an improved CO2 exposure method, which is based on the thermal shock effect of high-frequency CO2 laser pulses at several kHz. Compared with the method using low-frequency laser pulses at several Hz reported previously, this new technique is more effective due to the significant increase in the transient laser energy density focused on the fibre, which is likely to cause larger densification and residual stress relief and hence larger refractive index change in the fibre. The optical and mechanical characteristics of such a type of LPFGs have been studied by experiment.

引用

页码：327 / 333

页数：7

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