Abstract
A scheme for simultaneous extinction ratio enhancement, optical frequency stabilization, and wavelength reuse is proposed for reflective semiconductor optical amplifier-based wavelength-division-multiplexed passive optical networks to stabilize the optical channel frequency and enhance bidirectional transmission.This is achieved by simply employing a single Fabry-Perot etalon at the optical line terminal rather than having one at each optical network unit. Compared with the remodulation scheme that uses a 10-Gb/s optical signal with a 3-dB extinction ratio as a downstream optical signal and a seed light, our scheme shows improvements in power penalties greater than 1.8 dB and 1.4 dB for 10-Gb/s downstream and 1.25-Gb/s upstream signals, respectively, after transmission of 25 km at a bit-error-rate = 10−9. Moreover, a power penalty of only 0.5-dB is observed in comparison to the two 1.25-Gb/s upstream bit-error-rate results based on using a continuous-wave seed light and a data-erased seed light. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26178
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