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Realization of a coherent optical DPSK (differential phase-shift keying) heterodyne transmission system with 565 MBit/s at 1.064 um
Author(s): Bernhard Wandernoth; Juergen Franz
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Paper Abstract

We describe the realization of an optical 565 Mbit/s DPSK heterodyne breadboard communication system at 1064 nm for experiments concerning future space applications. The optical transmitter is based on a diode-pumped Nd:YAG single mode TMC laser with 620 mW which has been offset-locked to a stable low power ring laser. Phase modulation is obtained by a LiNbO3 traveling wave modulator. The receiver frontend consists of two InGaAs PIN Photodiodes in a balanced configuration and a transimpedance amplifier. The IF of 1130 MHz (only twice the data rate) is stabilized by an AFC which is able to follow frequency deviations of more than 10 GHz. The DPSK encoder and the clock/data recovery unit is based on GaAs technology. The whole system works with a single 12 V power supply useful when performing outdoor experiments. To obtain a bit error rate of 10 exp -10, a received light power of less than -48 dBm is required.

Paper Details

Date Published: 1 May 1991
PDF: 5 pages
Proc. SPIE 1522, Optical Space Communication II, (1 May 1991); doi: 10.1117/12.46095
Show Author Affiliations
Bernhard Wandernoth, DLR/Institute for Communications Technology (Germany)
Juergen Franz, DLR/Institute for Communications Technology (Germany)

Published in SPIE Proceedings Vol. 1522:
Optical Space Communication II

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