Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 21, Issue 9-12, Pages 615-617Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2009.2015431
Keywords
Carrier phase estimation; coherent detection; cross-phase modulation (XPM); polarization-multiplexed differential quadrature phase-shift keying (POLMUX-DQPSK); polarization multiplexing
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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 x 10.7-Gb/s on-off keying neighboring channels on a 50-GHz grid, despite the presence of strong cross-phase modulation.
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