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首页> 外文期刊>Optics Letters >Laser beam shaping using a single-mode fiber abrupt taper
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Laser beam shaping using a single-mode fiber abrupt taper

机译:使用单模光纤突变锥的激光束整形

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A new beam-shaping device was realized by an abrupt taper with a length of approx700 (mu)m and a waist of approx40 (mu)m. The insertion loss of the device is less than 3percent. The diameter of the flat beam top can be up to approx900 (mu)m with a small intensity variation (4percent) and a small half-divergence angle (2.5 deg). The conversion efficiency of the new device from a Gaussian-shaped to a flat-top profile is comparable with that of a long-period-gratings-based device, while keeping the fabrication cost low. The new device requires only a fusion splicer and standard SMF-28 fiber, eliminating the need for photolithographic procedures. The new device also has no obvious incident light polarization dependence.
机译:一种新的光束整形装置是通过具有大约700μm的长度和大约40μm的腰部的突然锥度实现的。设备的插入损耗小于3%。平坦光束顶部的直径可以达到约900μm,并且强度变化较小(4%),半发散角较小(2.5度)。新器件从高斯形到平顶轮廓的转换效率与基于长周期光栅的器件的转换效率相当,同时保持了较低的制造成本。新设备仅需要一个熔接机和标准SMF-28光纤,从而无需光刻程序。新器件也没有明显的入射光偏振依赖性。

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