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.
In this paper, various trade-offs for the design of short-range optical interconnects for on-board communication in a high-performance computer (HPC) will be discussed. Energy consumption and bandwidth requirements of the components, which are used for the realization of an optical link in future highly adaptive energy-efficient computers, will be estimated based on the energy consumption and bandwidth...
We envision the application of optical Space-division Multiplexing (SDM) to the next generation fiber-wireless communications as a firm candidate to increase the end user capacity and provide adaptive radiofrequency-photonic interfaces. This approach relies on the concept of “fiber-distributed signal processing”, where the SDM fiber provides not only radio access distribution but also broadband microwave...
We demonstrate an active random fiber laser by directly pumping a 100 m erbium-doped fiber at 980 nm wavelength, with a fiber loop mirror forming a half-open cavity. Random lasing with competing spectral modes in the range from 1535 nm to 1560 nm is achieved, with the maximum lasing slope efficiency around 10%. We also study the effect of combining a dispersion compensated fiber with the erbium-doped...
A novel radio over fiber (RoF) and free space optics (FSO) hybrid system based on optical OFDM (OOFDM) signal transmission is proposed in this paper to provide high capacity optical wireless indoor communication links. A low cost transmission scheme based on IM-DD is proposed to simplify and reuse existing infrastructure to deploy a high bandwidth FSO link. This paper shows the experimental results...
The photodetected intercore crosstalk (ICXT) of multicore fiber (MCF) based systems employing direct-detection (DD) is characterised. The impact of the laser phase noise on the photodetected ICXT and on the performance of DD orthogonal frequency division multiplexing (OFDM) MCF-based systems is experimentally demonstrated.
Dispersion has very strong detrimental effects on high data rate incoherent transmission systems. Situation gets much worse when data bits become only a few picoseconds long. In this paper we investigate how the dispersion can affect an optical auto-correlation function in optical code division multiple access (OCDMA) systems when data are carried by two-dimensional wavelength-hopping time-spreading...
We demonstrated the simultaneous transmission of multiband LTE-A signals, a WiFi IEEE802.11ac and a gigabit/s baseband 4-PAM signal over 1mm core diameter PMMA GI-POF. The optical link used a red light 650 nm laser diode and a p-i-n photodiode with a transimpedance amplifier. The 4-PAM transmission achieved 1.7 Gb/s (BER < 1×10−3), together with 9 LTE-A standard-compliant bands with EVM < 8%...
In this paper, we present our efforts for integrating network control and network planning, connecting the popular open-source ONOS control platform with Net2Plan, an open source network planner. The integration allows ONOS to use Net2Plan, combined with our resource allocation framework, as an on-line network optimization tool, calculating and re-routing paths as new requests arrive. It also lets...
In this paper, we present the impact of a Radio over fiber (RoF) link on the transmission of a signal dedicated to wireless link. Comparison is given between OFDM and FBMC based wireless signal by simulation with the electrical modelling approach of O/E and E/O devices and optical components. The considered link concerns the Intensity Modulation - Direct Detection (IM-DD) architecture where the wireless...
This paper reports the experimental performance of spatial division multiplexing (SDM) optical transmission systems. These SDM systems are intended to support key short- and medium-range low-latency applications as optical fronthaul in cellular networks, point-to-point optical backhaul and baseband optical links in datacentre applications. In particular, the experimental demonstration of optical fronthaul...
Optical communication technologies are the best solutions for the high-performance computing infrastructures (HPCs) and datacenter networks (DCNs). All-optical approach consists of switching all data at the packet in the optical domain which requires data rates higher than 100 Gbit/s. The quantum dot (QD) lasers are the promising candidates for such applications due to their high operation rates,...
In the context of long-haul Nyquist wavelength division multiplexed (WDM) superchannel system, a fifth-order Volterra-based nonlinear equalizer (VNLE) is proposed to compensate for the optical fiber nonlinear effects, which represent the major fiber impairment in such high data rate systems. A performance comparison of the fifth-order VNLE with the benchmark digital-back propagation (DBP) and the...
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.