Abstract
We present Stereo Multiplexing, a novel technique that permits simultaneous direct detection of two modulated optical carriers. This is accomplished by modulating the optical carriers with the difference and the sum of two signals. The linear performance of Stereo-multiplexed DQPSK signals is compared to single-carrier DQPSK and dualcarrier DQPSK. Subsequently, by means of simulations, the robustness of each format is compared for single channel and DWDM transmission of 55.5 Gb/s through 1040 km of SMF. This is done by searching the optimum dispersion map and input powers for each format and looking at the stability of the performance around the optimum. We show that the best performance and robustness is obtained by sharing the information between two carriers, and that Stereo is only 1dB below dual-carrier NRZ-DQPSK. We discuss the penalty associated with designing a DWDM system based only on the optimization of transmission of single channel.
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