Pätzold Welm M, Demircan Ayhan, Morgner Uwe
Opt Express. 2017 Jan 9;25(1):263-270. doi: 10.1364/OE.25.000263.
We present straight and s-curve waveguides in polymers fabricated by femtosecond laser writing. A number of parallel tracks are written inside the bulk material with a well-defined gap in the middle that forms the waveguide core. This approach offers the flexibility to tailor the mode-field diameter of the waveguide by adjusting the size of the gap. The waveguides exhibit very low propagation losses of 0.3 dB/cm and no significant bend losses for curve radii of R ≥ 20 mm. This fabrication process will allow for the realization of complex waveguide networks in a compact footprint chip.
我们展示了通过飞秒激光写入在聚合物中制备的直线型和S型曲线波导。在块状材料内部写入多条平行轨迹，中间有明确的间隙，该间隙形成波导芯。这种方法通过调整间隙大小，提供了定制波导模场直径的灵活性。这些波导表现出非常低的传播损耗，为0.3 dB/cm，对于半径R≥20 mm的曲线，没有明显的弯曲损耗。这种制造工艺将能够在紧凑的芯片尺寸上实现复杂的波导网络。
