Deep-blue supercontinnum sources with optimum taper profiles – verification of GAM

作者：Simon Toft Sørensen, Uffe Møller, Camilla Marie Larsen, Peter M. Moselund, Christian Jakobsen, J. Johansen, T. V. Andersen, Carsten Thomsen, Ole Bang · 发表于：Optics Express · 年份：2012 · DOI：10.1364/oe.20.010635 · 被引用次数：48 · 研究领域：Photonic Crystal and Fiber Optics、Advanced Fiber Laser Technologies、Optical Network Technologies

We use an asymmetric 2 m draw-tower photonic crystal fiber taper to demonstrate that the taper profile needs careful optimisation if you want to develop a supercontinuum light source with as much power as possible in the blue edge of the spectrum. In particular we show, that for a given taper length, the downtapering should be as long as possible. We argue how this may be explained by the concept of group-acceleration mismatch (GAM) and we confirm the results using conventional symmetrical short tapers made on a taper station, which have varying downtapering lengths.