This paper reports results of a study aimed at producing a Raman fibre laser based on a multicore fibre with high-reflectivity fibre Bragg gratings inscribed in its peripheral cores using femtosecond laser pulses. We present spectral and power characteristics of a Raman laser whose output power at a wavelength of 1090 nm is 2.5 W. The laser emission linewidth has been shown to decrease as a result of the reduction in nonlinear effects owing to the larger effective mode area in the multicore fibre in comparison with a standard single-mode fibre Raman laser.

中文翻译：

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带芯间耦合的七芯光纤拉曼激光器

本文报道了一项旨在生产基于多芯光纤的拉曼光纤激光器的研究结果，该光纤使用飞秒激光脉冲将高反射率光纤布拉格光栅刻在其外围纤芯中。我们展示了拉曼激光器的光谱和功率特性，其在 1090 nm 波长处的输出功率为 2.5 W。由于有效模式面积较大，激光发射线宽已显示减小，这是由于非线性效应的减少。多芯光纤与标准单模光纤拉曼激光器相比。