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URL:/institute-for-quantum-computing/events/optical-gro
 und-station-oberpfaffenhofen-next-generation
SUMMARY:Optical Ground Station Oberpfaffenhofen Next Generation: first\nsat
 ellite link tests with 80 cm telescope and AO system
CLASS:PUBLIC
DESCRIPTION:Summary \n\nIQC SEMINAR - JOHANNES PRELL\, INSTITUTE OF COMMUNI
 CATION AND\nNAVIGATION\, OSL GERMAN AEROSPACE CENTER (DLR) OBERPFAFFENHOFE
 N\,\nGERMANY\n\nQuantum Nano Centre (QNC) Room 0101 200 University Ave Wes
 t\, ��ݮ��Ƶ\nOntario\n\nSatellite based laser communication technology bo
 th classical and QKD\n(Q uantum K ey D istribution is gaining popularity a
 nd being\nincreasingly commercial i zed . Optical ground stations serve as
  the\nreceiv ing station in satellite to ground scenarios. The DLR institu
 te\nof Communications and Navigation hosts an experimental optical ground\
 nstation for research and demonstration purpose. Supporting\nincreasingly 
 demanding technical requirements from current and futu re\nmissions and te
 chnology demonstrations\, it was decided to replace the\n40cm Cassegrain t
 elescope an equip the new one with Nasmyth Ports for\ndirect experiments\,
  a Coudé Path to the lab and an Adaptive Optics\nSystem . This new 80cm (
 31.5inch) main apertur e diameter i nstrument\nis a Nasmyth Design Ritchey
  Chretien telescope The special feature is\nthe C oudé P ath which is gui
 ding the received light onto an optical\ntable in a lab oratory room below
  the telescope mount (see figure 1\nThe usage of the Coudé Path is new im
 plemented at DLR and offers a\nwide possibility for several different expe
 riments with the same setup\nThe optical propaga tion through a custom des
 igned lens system inside\nthe coudé path is optimized for wavelength s us
 ed for optical\ncommunication\, like 589nm\, 850nm\, 1064nm and 1550nm. It
  is possible to\nuse the setup as a receiving station and also as a transm
 itting\nfacility f or beacon lasers . The transmitt ing system ca n be\nin
 stalled either beside the telescope as a side installation or even\nlaunch
 ed from the optical table through coudé path and telescope\ndirectly\n\nT
 he optical Experiment table in the lab is equipped with an Adaptive\nOptic
 s ( System including fibe r coupling. This system uses a Shack\nHartmann W
 ave front sensor\, designed to match a deformable mirror in\nthe “ f rie
 d g eometry”. The system couples the light into a\nsingle mode fibe r \,
  which can be con nected to a coherent or Quantum\nencrypted communication
 s system. [ The telescope itself has four\nusable Nasmyth ports The first 
 one is reserved for the coudé pa th\, t\nwo others are equipped with opti
 cal benches directly on the telescope\,\nand on the last one has a fixed c
 lassical laser communication\nreceiving setup including two cameras one vi
 sible light and one infra\nred and a signal receiving united is installed 
 References\n\n[1] Andrew Paul Reeves\, Ilija R. Hristovski\, Alexandru Oct
 avian Duliu\,\nStefanie H äu sler\, Hela Friew Kelemu\, Pia Lützen\, Flo
 rian Moll\,\nEltimir Peev\, Juraj Poliak\, Amita Shrestha\, Joana Sul Torr
 es\; Adaptive\nOptics Corrected Bi Directional Links with a Geo Stationary
  Satellite\nfrom the DLR KN Optical Ground Station Figure 1 OGSOP System O
 vervi ew\n 
DTSTAMP:20250531T173435Z
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