Multiplexed fiber-ring laser sensors for ultrasonic detection

被引：24

作者：

Liu, Tongqing ^{[1
]}

Hu, Lingling ^{[1
]}

Han, Ming ^{[1
]}

机构：

[1] Univ Nebraska, Dept Elect Engn, Lincoln, NE 68588 USA

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 25期

基金：

美国国家科学基金会;

关键词：

ACOUSTIC-EMISSION DETECTION; BRAGG GRATINGS; MULTIWAVELENGTH OPERATION; SYSTEM;

D O I：

10.1364/OE.21.030474

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and demonstrate a multiplexing method for ultrasonic sensors based on fiber Bragg gratings (FBGs) that are included inside the laser cavity of a fiber-ring laser. The multiplexing is achieved using add-drop filters to route the light signals, according to their wavelengths, into different optical paths, each of which contains a separate span of erbium-doped fiber (EDF) as the gain medium. Because a specific span of EDF only addresses a single wavelength channel, mode completion is avoided and the FBG ultrasonic sensors can be simultaneously demodulated. The proposed method is experimentally demonstrated using a two-channel system with two sensing FBGs in a single span of fiber. (C) 2013 Optical Society of America

引用

页码：30474 / 30480

页数：7

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