Intracavity interrogation of an array of fiber Bragg gratings

被引：7

作者：

Margulis, Walter ^{[1
,2
]}

Lindberg, Robert ^{[2
]}

Laurell, Fredrik ^{[2
]}

Hedin, Gunnar ^{[3
]}

机构：

[1] RISE Res Inst Sweden, Fiber Opt, Electrum 236, SE-16440 Stockholm, Sweden

[2] Royal Inst Techn, Dept Appl Phys, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden

[3] Proxim AB, Skalholtsgatan 10, SE-16440 Kista, Sweden

来源：

OPTICS EXPRESS | 2021年 / 29卷 / 01期

基金：

瑞典研究理事会;

关键词：

SEMICONDUCTOR OPTICAL AMPLIFIER; TIME-DIVISION; SYSTEM;

D O I：

10.1364/OE.414094

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, we explore the interrogation of an array of fiber Bragg gratings as part of a laser cavity. A semiconductor optical amplifier in a sigma-shaped fiber cavity provides gain and is gated periodically at a rate that matches the roundtrip time associated with each grating of the array. The interrogator exhibits clear laser properties such as a threshold and linewidth narrowing. Besides improving the signal-to-noise ratio and enabling the re-use of wavelengths, it is found that this interrogation scheme enables monitoring of weak gratings spaced by less than 1 cm. Intracavity grating interrogation studied here is found to be a simple and powerful way to increase the number of sensor points for industrial applications. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：111 / 118

页数：8

共 21 条

[1] STEPPED-WAVELENGTH OPTICAL-FIBER BRAGG GRATING ARRAYS FABRICATED IN-LINE ON A DRAW TOWER [J].