Enhanced Free Space Beam Capture by Improved Optical Tapers. - Tim Bartley; Bettina Heim; Dominique Elser; Denis Sych; Metin Sabuncu; Christoffer Wittmann; Norbert Lindlein; Christoph Marquardt; Gerd Leuchs (QuantumComm, 2009)

M-ary phase shift keying receiver beating the standard quantum limit for any signal power. - Christian R. Müller; Andreas Leven; Henning Bülow; Laurent Schmalen; Gerd Leuchs; Christoph Marquardt (ECOC, 2014)

Satellite Quantum Communication via the Alphasat Laser Communication Terminal. - Dominique Elser; Kevin Günthner; Imran Khan; Birgit Stiller; Christoph Marquardt; Gerd Leuchs; Karen Saucke; Daniel Tröndle; Frank Heine; Stefan Seel; Peter Greulich; Herwig Zech; et al. (CoRR, 2015)

Quantum-limited measurements of optical signals from a geostationary satellite. - Kevin Günthner; Imran Khan; Dominique Elser; Birgit Stiller; Ömer Bayraktar; Christian R. Müller; Karen Saucke; Daniel Tröndle; Frank Heine; Stefan Seel; Peter Greulich; Herwig Zech; et al. (CoRR, 2016)

Telecom Compatible Quantum Key Distribution - Learning from Classical Coherent Communication. - Christoph Marquardt (OFC, 2019)