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Modular FSO Optical System Design for Classical and Quantum Optical Communication Systems

Ishtiaq, Shehryar and Schmidt, Christopher and Moll, Florian (2021) Modular FSO Optical System Design for Classical and Quantum Optical Communication Systems. In: International Conference on Space Optics (ICSO 2020). International Conference on Space Optics 2020, 30 March - 02 April 2021, Virtual.

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Optical communication systems are picking up pace in the various industries for its many scenarios in which it can be used. This includes satellite, aircraft and ground systems for which the DLR Institute of Communications and Navigation develops laser terminals. Free Space Optics (FSO) based optical systems have different applications ranging from terrestrial to airborne to space, and thus associated requirements to these application domains vary even though primary functional goals remain the same. Furthermore, quantum communication became of interest for its inherently secure key generation process that allows two nodes to securely communicate with each other and share secrets for long term security. Out of the different use cases of free-space optical laser terminal came the concept of having a modular FSO optical system design that could quickly adapt to the changing needs from mission to mission. The idea of a modularity appeals to many despite its challenges in the beginning, but in the long run the pros outweigh the cons. The concept was realized by carefully studying different requirements from various on-going and past projects and thereafter segmenting different aspects of the optical system based on three main categories, namely; the received path, the transmitted path and the shared path. To elaborate modularity in system; a Fast Steering Mirror (FSM) can be replaced with a fold mirror for a simpler design if it is not required, or an exchangeable CPA with integrated telescope mounted at the aperture of the optical bench to allow for different magnifications and ex-aperture beam diameter, all these without major impact on other subsystems. This greatly reduces the effort involved in re-evaluating system performance in the long run. In this study, the design and development of such an optical system is presented that lays its ground in the Institute of Communications and Navigation’s OSIRIS project, but still continues to serve as the primary optical system design of choice for future projects

Item URL in elib:https://elib.dlr.de/141907/
Document Type:Conference or Workshop Item (Lecture)
Title:Modular FSO Optical System Design for Classical and Quantum Optical Communication Systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ishtiaq, ShehryarShehryar.Ishtiaq (at) dlr.deUNSPECIFIED
Schmidt, ChristopherChristopher.Schmidt (at) dlr.deUNSPECIFIED
Moll, FlorianFlorian.Moll (at) dlr.deUNSPECIFIED
Date:30 March 2021
Journal or Publication Title:International Conference on Space Optics (ICSO 2020)
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Laser Terminal, Optical Communication, Quantum Communication, System Design, Modular System, KNOCGOP
Event Title:International Conference on Space Optics 2020
Event Location:Virtual
Event Type:international Conference
Event Dates:30 March - 02 April 2021
Organizer:ESA, CNES
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - OSIRIS Future
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Ishtiaq, Shehryar
Deposited On:27 Apr 2021 15:04
Last Modified:04 Mar 2022 12:10

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