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 experimentally evaluate bit-error rate performance of polybinary-pulse-shaped QAM signals in Super-Nyquist-WDM conditions, and clarify the relationship between spectral efficiency and SNR compared with conventional Nyquist-pulse-shaped signals.
We experimentally investigate filtering tolerance of 32-Gbaud DC-PDM-16QAM signals in 75-GHz-grid ROADM networks considering the trade-off between subcarrier-filtering and inter-subcarrier crosstalk.
Optical OFDM is a promising technology for highly spectrally efficient (SE) wavelength-division-multiplexing (WDM) system. Furthermore, the bit-rate 400 Gbit/s per WDM channel with SE of 8 bit/s/Hz is expected to be adopted for the next generation WDM system. For the application, optical OFDM is one of promising candidates because of the scalability for higher SE and higher bit-rate using multi-band...
We have successfully demonstrated 3 × 458-Gbit/s Optical Multi-band OFDM transmission over 160 km of SSMF with EDFA-only amplification at 50 GHz WDM spacing by utilizing narrowband optical filter.
We have successfully demonstrated the first terabit-class WDM transmission (7 × 1.12 Tb/s PDM-16QAM) over all-EDFA 400-km standard single mode fiber (SSMF) and 2 ROADMs. Q factors larger than 9.4 dB are found for all channels.
We investigate the effects of LiNbO3 modulator chirp on the performances of optical multilevel signals detected by a digital coherent receiver and evaluate the optical filtering tolerances of multilevel signals. The results show that return-to-zero (RZ) pulse carving is useful to prevent the performance deterioration caused by the modulator chirp.
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.