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Proceedings Paper

Highly sensitive 565-Mbit/s optical heterodyne receiver demonstrator for lambda=1.064 um with automatic frequency acquisition
Author(s): Michael M. Rasztovits-Wiech; Martin A. Schreiblehner; Arpad L. Scholtz; Walter R. Leeb; Peter Polacek
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Paper Abstract

We have designed, realized and tested a coherent optical 565 Mbit/s PSK heterodyne receiver demonstrator for space communications which employs a diode-pumped Nd:YAG ring laser at (lambda) equals 1064 micrometers as local oscillator (LO). The entire system was built as a robust and compact unit, with a fiber connector input for the received signal. The required optical input power is 22 photons/bit for a bit error probability of 10-6, corresponding to a sensitivity degradation of 3 dB compared to an ideal, shot noise limited PSK heterodyne system. Reliable, fully automatic frequency acquisition is achieved employing a microcomputer controlled two-speed algorithm. For initial frequency differences of up to 30 GHz the average acquisition time is 140 s. A frequency tracking subunit controls the LO laser frequency to keep the intermediate frequency constant, even in the presence of Doppler shift. Doppler shift rates of up to 11.5 MHz/s can be compensated.

Paper Details

Date Published: 20 April 1995
PDF: 9 pages
Proc. SPIE 2381, Free-Space Laser Communication Technologies VII, (20 April 1995); doi: 10.1117/12.207413
Show Author Affiliations
Michael M. Rasztovits-Wiech, Technische Univ. Wien (Austria)
Martin A. Schreiblehner, Technische Univ. Wien (Austria)
Arpad L. Scholtz, Technische Univ. Wien (Austria)
Walter R. Leeb, Technische Univ. Wien (Austria)
Peter Polacek, Schrack Aerospace (Austria)


Published in SPIE Proceedings Vol. 2381:
Free-Space Laser Communication Technologies VII
G. Stephen Mecherle, Editor(s)

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