Fibre Bragg gratings fabricated using a wavelength tuneable laser source and a phase mask based interferometer
Fibre Bragg gratings fabricated using a wavelength tuneable laser source and a phase mask based interferometer
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DOI：
10.1088/0957-0233/7/4/001
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发表时间：
1996-04-01
影响因子：
2.4
通讯作者：
Tatam, RP
中科院分区：
文献类型：
--
作者：
Dockney, ML;James, SW;Tatam, RP
光纤内布拉格光栅 (IFBG) 阵列越来越多地用于测量各种结构中的应变。为了最大限度地增加可从宽带源复用的 IFBG 数量，需要对布拉格中心波长进行精确控制和再现性。在本次交流中，我们证明了基于相位掩模的干涉仪和可调谐紫外写入波长的组合可以提供对布拉格中心波长的高分辨率控制。该干涉仪具有两种工作模式，提供高分辨率（0.03 nm）或大光谱范围（51 nm）。该技术与以前的写入方法进行了比较，并通过实验进行了演示。
Arrays of in-fibre Bragg gratings (IFBGs) are increasingly being employed to measure strain in a variety of structures. To maximize the number of IFBGs that can be multiplexed from a broad band source requires accurate control and reproducibility of the Bragg centre wavelength. In this communication we demonstrate that the combination of a phase mask based interferometer and tuneable UV writing wavelength can provide high resolution control over the Bragg centre wavelength. The interferometer is shown to have two regimes of operation, offering a high resolution (0.03 nm) or a large spectral range (51 nm). The technique is compared to previous writing methods and is demonstrated experimentally.