Gross, S.Riesen, N.Love, J.D.Withford, M.J.2018-08-072018-08-072014Proceedings of the 19th OptoElectronics and Communication Conference (OECC) / 39th Australian Conference on Optical Fibre Technology (ACOFT) : OECC/​ACOFT 2014, 2014, pp.156-1589781922107213http://hdl.handle.net/2440/113525We present ultra-broadband two- and three-mode multiplexers/de-multiplexers for few-mode optical fibres based on femtosecond laser written 3-dimensional tapered velocity couplers. The devices exhibit >20 dB coupling (LP₀₁ to LP₁₁) over a bandwidth of 400 nm.en© 2014 Engineers AustraliaConference paper00300935830003471889000602-s2.0-84907076324430030Riesen, N. [0000-0002-6803-0666]