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Proceedings Paper

Inter-satellite coherent optical communication locked frequency analysis and method
Author(s): Haichao Guo; Shang She; Li Xiaojun; Dawei Song
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Paper Abstract

In free space optical homodyne receiver that analyze Residual carrier COSTAS loop, Inter-satellite LEO-GEO laser communication link frequency analysis, result from Doppler frequency shift 10GHz in the maximum range, LEO-GEO inter-satellite laser links between Doppler rate of change in the 20MHz/s. The optical homodyne COSTAS receiver is the application in inter-satellite optical link coherent communication system. The homodyne receiver is the three processes: Scanning frequency, Locked frequency and Locked phase, before the homodyne coherent communication. The processes are validated in lab., and the paper presents the locked frequency data and chart, LO laser frequency with triangle control scanning and receiving optical frequency is mixed less 100MHz intermediate frequency, locked frequency range between 100MHz and 1MHz basically, discriminator method determines mixing intermediate frequency less 1MHz between the signal laser and the LO laser with the low-pass filter due to frequency loop and phase loop noise. When two loops are running, the boundary frequency of laser tuning is fuzzy, so that we must be decoupling internal PID parameters. In the Locked frequency and phase COSTAS loop homodyne receiver gave the eye-diagram with Bit error rate 10E-7.

Paper Details

Date Published: 3 October 2014
PDF: 6 pages
Proc. SPIE 9224, Laser Communication and Propagation through the Atmosphere and Oceans III, 92241B (3 October 2014); doi: 10.1117/12.2053550
Show Author Affiliations
Haichao Guo, Science and Technology on Space Microwave Lab. (China)
Beijing Institute of Technology (China)
Shang She, Science and Technology on Space Microwave Lab. (China)
Li Xiaojun, Science and Technology on Space Microwave Lab. (China)
Dawei Song, Science and Technology on Space Microwave Lab. (China)


Published in SPIE Proceedings Vol. 9224:
Laser Communication and Propagation through the Atmosphere and Oceans III
Alexander M. J. van Eijk; Christopher C. Davis; Stephen M. Hammel, Editor(s)

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