DocumentCode :
2325778
Title :
Inter-satellite laser communication system
Author :
Lakshmi, Shantha K. ; Kumar, Senthil M P ; Kavitha, K.V.N.
Author_Institution :
Adhiyamaan College of Engineering, Hosur, India
fYear :
2008
fDate :
13-15 May 2008
Firstpage :
978
Lastpage :
983
Abstract :
Laser communication links in space are attractive alternatives to present-day microwave links. This paper firstly makes an overview of an optical inter-satellite communication terminal. This terminal contains several modules such as transmit assembly, receive assembly, diplexers, mirrors assembly, acquisition and tracking sensor optics, etc. Out of these modules present in the terminal, we proposed the optical antenna design and development of-collimation lenses system. And also carried out partial prototyping and evaluating of sensitive acquisition tracking sensor(ATS) module featuring a receiving collimator fiber assembly. ATS system is overviewed using proposed two level system controls. The lower level controls the gimbals of the optical head of the electro-optical transceiver. The higher level is a fast closed loop that simultaneously controls the beam width and direction. Initial pointing acquisition assumes exchange of position related information between the satellites to establish the initial line of sight (LOS). After initial acquisition a cooperative extremum-seeking algorithm is used for the fast higher level closed loop control This compact and light weight terminal achieves single wavelength data transmission at 2.5Gbps.
Keywords :
Assembly; Lenses; Masers; Microwave communication; Mirrors; Optical collimators; Optical design; Optical fiber sensors; Optical sensors; Prototypes; “optical intersatellite”; Acquisition and Tracking Sensor (ATS); collimator fiber assembly; gimbals structure; laser communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer and Communication Engineering, 2008. ICCCE 2008. International Conference on
Conference_Location :
Kuala Lumpur, Malaysia
Print_ISBN :
978-1-4244-1691-2
Electronic_ISBN :
978-1-4244-1692-9
Type :
conf
DOI :
10.1109/ICCCE.2008.4580753
Filename :
4580753
Link To Document :
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