In this work, the influence of the distribution element position and the reflective optical network unit (ONU) gain in
wavelength-division-multiplexing passive optical networks are reported. After the theoretical and experimental analysis, it is
determined that the best crosstalk-to-signal ratio is achieved if the multiplexer is placed either in the ONU or optical light termination vicinity, and the ONU gain has a new optimum value depending on the position. Also, it is demonstrated that Rayleigh backscattering is generally irrelevant in downstream transmission.
CitationLópez, E. [et al.]. Optimization of Rayleigh-limited WDM-PONs with reflective ONU by MUX positioning and optimal ONU gain. "IEEE photonics technology letters", Gener 2010, vol. 22, núm. 2, p. 97-99.
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