10.18453/rosdok_id00002277 Semenov, Andrii Andrii Semenov http://d-nb.info/gnd/1162905875 https://orcid.org/0000-0001-5104-6445 Universität Rostock 2018 530 Physics 2018 en http://purl.uni-rostock.de/rosdok/id00002277 urn:nbn:de:gbv:28-diss2018-0111-3 In this thesis I summarize my research related to the impact of the environment during generation, propagation, and detection of nonclassical light. First, I will analyse unwanted effects in light sources, which are implemented with leaky cavities. Second, I will consider effects of imperfect photodetection. Third, I will present our theoretical consideration of free-space channels, which is the first self-consistent quantum-optical model involving the atmospheric turbulence.