论文标题
用标准光纤给光提供新的转折：彩虹阿基赛马螺旋发射
Giving light a new twist with standard optical fibres: rainbow Archimedean spiral emission
论文作者
论文摘要
我们展示了一种新的实用方法来产生多色螺旋形梁。它利用标准的二氧化硅光纤与标题为“输入激光束”的结合。纤维轴向对称的产生破裂导致螺旋梁的传播。相关的输出远场具有螺旋形状，与输入激光功率值无关。鉴于，具有高功率近红外飞秒激光器，会产生可见的超脑螺旋发射。通过适当控制输入激光耦合条件，螺旋的颜色在彩虹分布中在空间上进行自组织。我们的方法与激光源波长和极化无关。因此，标准光纤可用于在许多应用中生成螺旋梁，从通信到光学镊子和量子光学元件。
We demonstrate a new practical approach for generating multicolour spiral-shaped beams. It makes use of a standard silica optical fibre, combined with a titled input laser beam. The resulting breaking of the fibre axial symmetry leads to the propagation of a helical beam. The associated output far-field has spiral shape, independently of the input laser power value. Whereas, with a high-power near-infrared femtosecond laser, a visible supercontinuum spiral emission is generated. With appropriate control of the input laser coupling conditions, the colours of the spiral spatially self-organize in a rainbow distribution. Our method is independent of the laser source wavelength and polarization. Therefore, standard optical fibres may be used for generating spiral beams in many applications, ranging from communications to optical tweezers and quantum optics.
