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Alfiad M. van den Borne D. Napoli A. Koonen A.M.J. de Waardt H. 《Photonics Technology Letters, IEEE》2008,20(10):818-820
We experimentally demonstrate that a differential phase-shift keying (DPSK) receiver employing a Mach-Zehnder delay interferometer (MZDI) with a bit delay of less than one bit combined with maximum likelihood sequence estimation can considerably enhance the tolerance to chromatic dispersion (CD). Furthermore, we analyze the impact of sampling phase and optimize the MZDI bit delay for 10.7-Gb/s nonreturn-to-zero (NRZ)-DPSK demodulation. Our investigation shows that a 4000-ps/nm CD tolerance at 2-dB penalty is feasible for 10.7-Gb/s NRZ-DPSK. 相似文献
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Alfiad M.S. Kuschnerov M. Wuth T. Xia T.J. Wellbrock G. Schmidt E.-D. van den Borne D. Spinnler B. Weiske C.J. de Man E. Napoli A. Finkenzeller M. Spaelter S. Rehman M. Behel J. Chbat M. Stachowiak J. Peterson D. Lee W. Pollock M. Basch B. Chen D. Freiberger M. Lankl B. de Waardt H. 《Photonics Technology Letters, IEEE》2009,21(10):615-617
We demonstrate transmission of a 111-Gb/s coherent polarization-multiplexed return-to-zero differential quadrature phase-shift keying signal over 1040-km field-deployed fiber together with different types of neighboring channels, and with a cascade of 50-GHz reconfigerable optical add-drop multiplexers. Our transmission experiment proves the feasibility of transmitting a 111-Gb/s phase-modulated channel with 10 times 10.7-Gb/s on-off keying neighboring channels on a 50-GHz grid, despite the presence of strong cross-phase modulation. 相似文献
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