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首页> 外文期刊>Sensors and Actuators, A. Physical >Fibre length-dependent fluorescence spectral characteristics in high erbium concentration fibres for the optimization of FBG-based fibre sensor systems
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Fibre length-dependent fluorescence spectral characteristics in high erbium concentration fibres for the optimization of FBG-based fibre sensor systems

机译：高浓度光纤中取决于光纤长度的荧光光谱特性，用于基于FBG的光纤传感器系统的优化

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摘要

This paper reports the behavioural characteristics of the fluorescence spectrum in high concentration 5000 ppm erbium-doped fibre (EDF), as a function of the EDF length, showing their potential for optical sensor applications to increase the potential number of multiplexed ‘all fibre’ sensors on a single channel. Experiments were conducted to analyze the fluorescence peak wavelength shift, the bandwidth and output power at a convenient fixed low pump power of 37 mW, using excitation from two different laser diodes wavelengths, at 980 and 1480 nm. It was found that the fibre length of the high concentration EDF has a direct effect on the fluorescence peak shift. The fluorescence spectrum tends to show different spectral profiles with its maximum position shifting towards longer wavelengths as the length of the EDF increases, with a bandwidth at full width half maximum (FWHM) covering portions of the C-, L-, and U-band. It has also been shown that pumping with the 980 nm LD contributes to a higher fluorescence shift compared to the 1480 nm LD, at the expense of output power. The use of the fluorescence peak shift is important in the design and optimization of efficient fibre Bragg grating (FBG)-based optical fibre and fibre laser-based sensor systems.
机译：本文报道了高浓度5000 ppm掺fiber光纤（EDF）中荧光光谱的行为特征，该行为特征是EDF长度的函数，显示了其在光学传感器应用中增加“全光纤”多路复用传感器数量的潜力在单个通道上。进行了实验，通过使用两个不同的激光二极管波长分别为980和1480 nm的激发，分析了便利的37 mW固定低泵浦功率下的荧光峰波长偏移，带宽和输出功率。发现高浓度EDF的纤维长度对荧光峰位移具有直接影响。荧光光谱倾向于表现出不同的光谱轮廓，其最大位置随着EDF长度的增加而移向更长的波长，其全宽半峰（FWHM）带宽覆盖了C波段，L波段和U波段的一部分。还已经显示，与1480 nm LD相比，用980 nm LD进行泵浦有助于实现更高的荧光位移，但以输出功率为代价。在设计和优化基于高效光纤布拉格光栅（FBG）的光纤和基于光纤激光器的传感器系统中，荧光峰移的使用非常重要。

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