Higher order mode optical fiber Raman amplifiers. - Karsten Rottwitt; Soren Michael Mork Friis; Mario A. Usuga Castaneda; Erik N. Christensen; Jacob Gade Kofoed (ICTON, 2016)

Improved SBS Limited Parametric Conversion by Use of Few-Mode Fibers. - Neethu Mariam Mathew; Erik N. Christensen; Lars Gruner-Nielsen; Karsten Rottwitt (ECOC, 2018)

Nonlinear Optical Signal Processing and Generation of Quantum States using Intermodal Four-wave Mixing. - Karsten Rottwitt; Mario A. Usuga Castaneda; Erik N. Christensen; Jesper B. Christensen; Jacob Gade Koefoed (ICTON, 2018)

Quantum Information Processing Using Intermodal Four-Wave Mixing in Multi-Mode Optical Fibers. - Karsten Rottwitt; Jesper B. Christensen; Erik N. Christensen; Jacob Gade Koefoed (ICTON, 2019)