Euser TG, Whyte G, Scharrer M, Chen JSY, Abdolvand A, Nold J, Kaminski CF, Russell PStJ "Dynamic control of higher-order modes in hollow-core photonic crystal fibers" Optics Express, Vol. 16, Issue 22, pp. 17972-17981, (2008), DOI:10.1364/OE.16.017972 |
We present a versatile method for selective mode coupling into higher-order modes of photonic crystal fibers, using holograms electronically generated by a spatial light modulator. The method enables non-mechanical and completely repeatable changes in the coupling conditions. We have excited higher order modes up to LP31 in hollow-core photonic crystal fibers. The reproducibility of the coupling allows direct comparison of the losses of different guided modes in both hollow-core bandgap and kagome-lattice photonic crystal fibers. Our results are also relevant to applications in which the intensity distribution of the light inside the fiber is important, such as particle- or atom-guidance.