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首页> 外文会议>Optical Components and Materials IV; Proceedings of SPIE-The International Society for Optical Engineering; vol.6469 >Electric-arc-induced long period fiber gratings for gain equalization of erbium-doped optical amplifiers
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Electric-arc-induced long period fiber gratings for gain equalization of erbium-doped optical amplifiers

机译：电弧感应长周期光纤光栅，用于掺gain光放大器的增益均衡

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摘要

Long-Period Fiber Gratings (LPFGs) were fabricated in single mode fibers (SMF28) by using electric arc discharges produced from a commercial fiber splicer. In our experimental set-up, we noticed that, during each arc, the fiber becomes slightly tapered due to the presence of the longitudinal tension: the quantitative effect depends on the time length and arc power. We have experimentally studied how the LPFG performance may be affected by the arc discharge process, and we found that, with periods typically of few hundreds microns, the spectral response of the grating depends on the period A, the intensity of the perturbation, the grating length and the type of mode-coupling induced. The reproducibility of the grating is very important, in particular for applications like a gain equalizer for an erbium-doped optical amplifier. In the modelling of the process, the mode coupling induced by the LPFG cannot be estimated directly from the transmission spectra; therefore, we propose a method to determine the mode-coupling occurring in the fiber and to assess the index modulation induced by the electric arcs. This method combines experimental and simulated data, and its use is not limited to the case of electric-arc-induced LPFGs.
机译：通过使用从商用光纤熔接机产生的电弧放电，在单模光纤（SMF28）中制造了长周期光纤光栅（LPFG）。在我们的实验装置中，我们注意到，在每个电弧中，由于存在纵向张力，纤维会逐渐变细：定量效果取决于时间长度和电弧功率。我们已经通过实验研究了电弧放电过程可能会影响LPFG的性能，并且我们发现，在周期通常为几百微米的情况下，光栅的光谱响应取决于周期A，扰动强度，光栅长度和诱导的模式耦合类型。光栅的再现性非常重要，特别是对于像掺-光放大器的增益均衡器这样的应用。在过程建模中，由LPFG引起的模式耦合无法直接从透射光谱中估算出来。因此，我们提出了一种确定光纤中发生的模耦合并评估电弧引起的折射率调制的方法。该方法结合了实验数据和模拟数据，其使用不仅限于电弧感应的LPFG。

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