The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We demonstrate 112Gb/s transmission using PM-QPSK format and FPGA-based real-time digital signal processing. By employing framed processing architecture for polarization demultiplexing and carrier phase estimation, stable operation of error free after FEC and wide frequency offset have been achieved.
The performance of signal monitoring was studied to estimate signal degradation by processing data obtained from SOP measurement. Good correlation between measured Q-value and estimation from SOP data was observed under the existence of SOPMD.
We propose and verify experimentally a method of accurately setting the timing of phase modulation over temporal ranges wider than 1 symbol period for DQPSK transmitters, allowing Q to be optimized within 0.1 dB.
Transmission of Pol-Mux 110 Gb/s RZ-DQPSK signal with automatic Pol-Dmux at receiver over straight 2,000-km SMF line with +3 dBm/ch shows that the performance is mainly governed by OSNR and PMD.
Long-term transmission performances of polarization multiplexed 2x50 Gb/s NRZ/RZ-DPSK signals, denoting good transmission performances but with larger PMD-induced BER fluctuations compared with 100 Gb/s RZ-DQPSK, are successfully observed by constructing an automatic polarization de-multiplexer.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.