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首页> 外文期刊>Optics Letters >Management of the high-order mode content in large (40 (mu)m) core photonic bandgap Bragg fiber laser
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Management of the high-order mode content in large (40 (mu)m) core photonic bandgap Bragg fiber laser

机译：大（40μm）芯光子带隙布拉格光纤激光器中高阶模含量的管理

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摘要

Very large-mode-area Yb~(3+)-doped single-mode photonic bandgap (PBG) Bragg fiber oscillators are considered. The transverse hole-burning effect is numerically modeled, which helps properly design the PBG cladding and the Yb~(3+)-doped region for the high-order mode content to be carefully controlled. A ratio of the Yb~(3+)-doped region diameter to the overall core diameter of 40percent allows for single-mode emission, even for small spool diameters of 15 cm. Such a fiber was manufactured and subsequently used as the core element of a cw oscillator. Very good beam quality parameter M~(2) velence 1.12 and slope efficiency of 80percent were measured. Insensitivity to bending, exemplified by the absence of temporal drift of the beam, was demonstrated for curvature diameter as small as 15 cm.
机译：考虑了非常大的掺Yb〜（3+）模面积的单模光子带隙（PBG）布拉格光纤振荡器。对横向烧孔效应进行了数值模拟，这有助于正确设计PBG包层和Yb〜（3+）掺杂区域，以便小心控制高阶模态含量。掺Yb〜（3+）的区域直径与总铁芯直径的40％之比允许单模发射，即使对于15 cm的小线轴直径也是如此。制造了这种光纤，随后将其用作连续波振荡器的核心元件。测得非常好的光束质量参数M〜（2）的速度为1.12，斜率效率为80％。对于小至15 cm的曲率直径，证明了对弯曲不敏感，例如不存在光束的时间漂移​​。

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