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Proceedings Paper

Ultra-High Receiver Sensitivity For Coherent Transmission Systems At 565/140 Mbit/S Using DPSK/FSK Modulation.
Author(s): E. Meissner; R. Noe; H. Rodler
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Paper Abstract

It is widely known that heterodyne detection provides an improved receiver sensitivity and selectivity compared to direct detection. Therefore heterodyne systems are very interesting for both long haul transmission and local networks. For long haul transmission the up to 15 dB improvement in receiver sensitivity at high data rates will be the most important issue. This means that the receiver spacing will increase by about 75 km. The most sensitive PSK and DPSK modulation formats are of interest for this application. In LANs and distribution networks it will be very advantageous to transmit a great number of densely spaced channels over one fiber. In the subscriber premises, a heterodyne receiver selects one of them without any switching element. Since the FSK modulation format is very tolerant to laser linewidth and since low cost is an important issue for broadcast systems, FSK systems at moderate data rates with tunable DFB lasers will be used for this application. We demonstrate two transmission experiments with 565 Mbit/s DPSK and 140 Mbit/s FSK modulation, respectively, using different laser types.

Paper Details

Date Published: 5 February 1990
PDF: 9 pages
Proc. SPIE 1175, Coherent Lightwave Communications: Fourth in a Series, (5 February 1990); doi: 10.1117/12.963272
Show Author Affiliations
E. Meissner, SIEMENS AG (Germany)
R. Noe, SIEMENS AG (Germany)
H. Rodler, SIEMENS AG (Germany)


Published in SPIE Proceedings Vol. 1175:
Coherent Lightwave Communications: Fourth in a Series
Roger C. Steele; Harish R. Sunak, Editor(s)

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