Summary form only given. In spite of ancient lore suggesting that lightwave receivers have several dB better sensitivity for return-to-zero (RZ) modulated signals, deployed lightwave systems typically use non-return-to-zero (NRZ) modulation. In anticipation of increases in lightwave transmission bit rates beyond those conveniently manipulated by electronic devices, much effort has been devoted to all-optical techniques for lightwave signal processing. These techniques often require pulsed light rather than cw light and therefore RZ modulation may become important. However, nonlinearity plays a dominant role in many-channel wavelength-division multiplexed (WDM) systems, so one might speculate that RZ modulation, with its higher peak powers and larger bandwidths, may not be practical in high-performance WDM systems. If correct, this will reduce the attractiveness of many all-optical techniques. In previous experimental work, RZ and NRZ have been compared in the long, low-dispersion-fiber systems typically deployed undersea. Here, we compare RZ and NRZ in a WDM system employing the 1.3-/spl mu/m dispersion-zero fiber (SMF) currently deployed in many national terrestrial networks.


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    Title :

    Evaluation of return-to-zero modulation for wavelength-division-multiplexed transmission over conventional single-mode fiber


    Contributors:
    Jopson, R.M. (author) / Gnauck, A.H. (author) / Nelson, L.E. (author) / Garrett, L.D. (author) / Wolf, C. (author)


    Publication date :

    1998-01-01


    Size :

    237615 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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