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Novel Pump-Limited High-Power Photonic Crystal Fiber with 260-W Output

机译:具有260W输出的新型泵浦限制大功率光子晶体光纤

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It is generally agreed upon that power scaling in single-frequency continuous-wave (CW) fiber amplifiers is primarily impaired by the onset of stimulated Brillouin scattering (SBS). Consequently, several techniques have been implemented or suggested to suppress SBS in fiber amplifiers including large-mode area (LMA) fibers [1], thermal gradients [2], fibers possessing acoustic index of refraction gradients [3], and multitone amplification [4]. State-of-the-art conventional LMA fibers are generally limited in practice to diameters that are less than 30 urn. This makes photonic crystal fibers (PCFs) attractive as a means to mitigate the SBS process. The introduction of micron-sized air holes in the cladding allows for more precise control of the numerical aperture and thus leads to larger cores while maintaining single-mode operation.
机译:人们普遍同意,单频连续波(CW)光纤放大器的功率缩放主要受到受激布里渊散射(SBS)的影响。因此,已经实施或建议了几种抑制光纤放大器中的SBS的技术,包括大模面积(LMA)光纤[1],热梯度[2],具有折射率梯度的光纤[3]和多音放大[4]。 ]。在实践中,现有技术的常规LMA纤维通常限于直径小于30μm。这使光子晶体光纤(PCF)成为减轻SBS过程的一种手段具有吸引力。在包层中引入微米级的气孔,可以更精确地控制数值孔径,从而在保持单模运行的同时,可以形成更大的纤芯。

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