Using Normalised Sections for the Design of All Optical Networks. - Christoph Caspar; Ronald Freund; Norbert Hanik; Lutz Molle; Christophe Peucheret (ONDM, 2000)

Cost optimization study using dispersion-managed fiber in a German backbone network. - Leo Nederlof; David Mirto; Sergey Ten; Matthias Gunkel; Dirk Breuer; Hans Reiner; Helmut Cremer; Ronald Freund; Christoph Caspar; Friedrich Raub (DRCN, 2005)

High speed 160 Gb/s DMT VCSEL transmission using pre-equalization. - Christoph Kottke; Christoph Caspar; Volker Jungnickel; Ronald Freund; Mikel Agustin; Nikolay N. Ledentsov (OFC, 2017)

Analog 2: 1 Multiplexer with over 110 GHz Bandwidth in SiGe BiCMOS Technology. - Tobias Tannert; Markus Grözing; Manfred Berroth; Christian Schmidt 001; Jung Han Choi; Christoph Caspar; Jonathan Schostak; Volker Jungnickel; Ronald Freund; Holger Rücker (BCICTS, 2021)