Feasibility study of coherent LEO-ground link system using an optical injection phase lock loop technique

Author

Shoji, Yozo ; Takayama, Yoshihisa ; Toyoshima, Morio ; Fice, Martyn J. ; Seeds, Alwyn J.

Author_Institution

Space Commun. Syst. Lab., NICT, Koganei, Japan

fYear

2011

fDate

11-13 May 2011

Firstpage

318

Lastpage

321

Abstract

The feasibility of an optical injection phase lock loop technique for use in a coherent laser communications link between a LEO (Low Earth Orbit Satellite) and a OGS (Optical Ground Station) is studied. The Doppler frequency shift in the LEO-OGS coherent link is estimated and the impact on the link performance is investigated. It is demonstrated experimentally that a 10 Gbps BPSK link can successfully maintain stable frequency and phase locking status under the condition that the signal laser frequency changes over 9 GHz at a frequency deviation rate up to 1 Hz, which is ample to meet the requirement for the LEO-OGS coherent link.

Keywords

optical links; phase locked loops; satellite communication; Doppler frequency shift; LEO-OGS coherent link; Low Earth Orbit Satellite; coherent LEO-ground link system; coherent laser communications link; optical ground station; optical injection phase lock loop technique; Doppler effect; Downlink; Low earth orbit satellites; Optical receivers; Semiconductor lasers; Time frequency analysis; LEO; coherent; downlink; injection lock; laser; phase lock loop; satellite;

fLanguage

English

Publisher

ieee

Conference_Titel

Space Optical Systems and Applications (ICSOS), 2011 International Conference on

Conference_Location

Santa Monica, CA

Print_ISBN

978-1-4244-9686-0

Type

conf

DOI

10.1109/ICSOS.2011.5783690

Filename

5783690