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 discuss a multi-vendor line-side interoperability field trial using Juniper and Cisco 100G coherent DWDM routers interfaces. The field trial demonstrates 100G DP-QPSK transmission over a 1030-km link from Boca Raton to Jacksonville uses the HG-FEC line-side interoperability mode for 100G coherent DWDM transceivers.
Multi-Layer networks require alignment of topology information between layers to avoid routing loops and delayed convergence. We describe multi-vendor packet-optical integration using link abstraction utilizing SRLG to provide the necessary basis for coordinated between layers.
Next-generation optical transceivers will need to elastically adapt their line rate and channel spacing to actual network characteristics. In this paper we compare the impact of flex-grid and flex-rate technology on the achievable network capacity.
Flexi-rate transceivers make it possible to adapt the transmitted data rate to actual network characteristics. In this paper we describe how flexi-rate transceivers combined with hybrid-QAM modulation can enable dynamic capacity optimization in optical networks.
One of the possible solutions is to use space division multiplexing in order to overcome the capacity crunch. Few mode fibers (FMF) have attracted a lot of attention in the recent years, however still a lot of research is required to enable transmission over FMF. One of the problems with the realization of FMF transmission is that these fibers have a modal dispersion which results in high number of...
OFDM requires the lowest equalizer complexity for crosstalk compensation in a mode-division-multiplexing receiver. For a 2000-km transmission distance and less than 10% OFDM-specific overhead, the modal dispersion must be below 6 ps/km for 10×10 MIMO.
We show the design optimization of phase masks for mode conversion and subsequent mode division multiplexing/de-multiplexing. We focus on optimization of mask resolution and offset tolerance to minimize mode power crosstalk.
We demonstrate excellent 100G transmission performance over dispersion-shifted-fiber, the most challenging of all deployed fiber types. Post-FEC error-free performance is shown after 660 km of transmission for a fully loaded 96 × 100G transmission link.
We show that OFDM requires the lowest equalizer complexity for crosstalk compensation in a mode-division-multiplexing receiver. For a 2000-km transmission distance and less than 10% OFDM-specific overhead, the modal dispersion must be below 12 ps/km.
We analyze two-mode transmission for 402-Gb/s 3MDM-PM-QPSK-OFDM modulation and different DMD values. We show that only with low-DMD fiber it is possible to effectively equalize mode coupling and bridge long-haul transmission distances.
In this work the impact of mode-dependent loss (MDL) from optical amplifiers in few-mode fibers with weak and strong mode coupling is analyzed. For a 409-Gbit/s 3MDM-DP-QPSK system it is shown that strong mode coupling reduces the impact of MDL in a similar manner polarization-dependent loss is reduced by polarization-mode dispersion.
In this work, the DSP equalizer complexity is analyzed as a function of the modal dispersion and the number of supported modes of a few-mode fiber. It is shown that a training symbol based scheme such as OFDM is virtually unaffected by the increasing number of modes, whereas for blind FDE/TDE equalization the complexity drastically increases.
Next-generation optical transmission systems are edging ever closer to forecasted capacity limits. In this paper we discuss the impact on system design and outline how core networks might still be scaled to 400G and beyond.
This tutorial will provide on overview of advances in modulation formats and digital signal processing for fiber-optic transmission systems. In particular options for 400-Gb/s data transport will be investigated.
The nonlinear tolerance of CP-QPSK is investigated for both single channel and WDM transmission and different fiber types. We derive performance predictions for CP-QPSK transmission on different dispersion map and different span number.
The nonlinear tolerance of 40-Gb/s and 100-Gb/s CP-QPSK signals is investigated for mixed fiber links without chromatic dispersion compensation. We show that mixed fiber configurations can significantly affect the nonlinear threshold.
We investigate the nonlinear tolerance of 42.8-Gb/s DPSK with PDM-OFDM neighbors. It is found that the XPM penalty scales with the OFDM-bandwidth and that for data rates up to 40-Gb/s delta powers are required.
The rise of coherent detection and digital signal processing is drastically changing the design of optical transmission systems. In this paper we review the challenges and opportunities offered by such receivers in the design of long-haul 100G systems.
Even though OFDM is a well established modulation format in the wireless community, it is relatively new in fibe-roptics. In this paper we give an overview of the past, present and future of optical OFDM for long-haul fiber-optic transmission systems and discuss several application spaces for the commercialization of optical OFDM.
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.