Highly sensitive 565-Mbit/s optical heterodyne receiver demonstrator for lambda=1.064 um with automatic frequency acquisition

Michael M. Rasztovits-Wiech; Martin A. Schreiblehner; Arpad L. Scholtz; Walter R. Leeb; Peter Polacek

doi:10.1117/12.207413

20 April 1995 Highly sensitive 565-Mbit/s optical heterodyne receiver demonstrator for λ=1.064 μm with automatic frequency acquisition

Michael M. Rasztovits-Wiech, Martin A. Schreiblehner, Arpad L. Scholtz, Walter R. Leeb, Peter Polacek

Author Affiliations +

Proceedings Volume 2381, Free-Space Laser Communication Technologies VII; (1995) https://doi.org/10.1117/12.207413
Event: Photonics West '95, 1995, San Jose, CA, United States

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.

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Michael M. Rasztovits-Wiech, Martin A. Schreiblehner, Arpad L. Scholtz, Walter R. Leeb, and Peter Polacek "Highly sensitive 565-Mbit/s optical heterodyne receiver demonstrator for λ=1.064 μm with automatic frequency acquisition", Proc. SPIE 2381, Free-Space Laser Communication Technologies VII, (20 April 1995); https://doi.org/10.1117/12.207413

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