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.
Significant improvements in the performance of electronic dispersion post-compensation enabled by beating interference compensation were experimentally demonstrated in a 112 Gb/s/λ WDM Nyquist-subcarrier modulation direct-detection system in transmission over distances up to 240 km.
We demonstrate an all-fiber, ring core photonic lantern to generate high quality OAM modes up to the second order at 1550nm. We achieved low-loss coupling of the lantern OAM modes into a ring core fiber.
The first multi-terabit/s WDM data transmission through anti-resonant hollow-core fiber is demonstrated. 16×32-GBd dual-polarization Nyquist-shaped 256QAM channels propagated through a 270-m long fiber. No non-linearity penalty was observed for powers up to 1W.
We experimentally demonstrate 112Gb/s/channel 35GHz-spaced WDM direct-detection SSB Nyquist-SCM transmission over a record distance of 240km SSMF using a novel beating interference compensation method, which offers a 7.6dB required OSNR improvement, and 200% reach enhancement.
Recently, it has been demonstrated that by recovering the amplitude and phase of the backscattered optical signal, a ΦOTDR using pulse coding can be treated as a fully linear system in terms of trace coding/decoding, thus allowing for the use of tens of thousands of bits with a dramatic improvement of the system performance. In this communication, as a continuation of previous work by the same authors,...
We proposed a novel SSBI mitigation technique with significantly lower DSP complexity. It was experimentally tested in 7×25 Gb/s WDM DD SSB 16-QAM N-SCM signal transmission over 480 km SSMF with a net ISD of 2.4 (b/s)/Hz.
Coherent communications have become a commercial reality with the deployment of 40 G and 100 G systems using Quadrature Phase Shift Keying (QPSK) in the core network. In the next evolution of these systems higher order modulation formats have the potential to significantly increase capacity while maintaining the baud rate at levels which allow the use of readily available lower cost electro-optics...
Process of configuration and fault scan is required to be repeated many times before all resources of a FPGA-under-test are tested and diagnosed. Both FPGA test system and test schemes have been studied and presented in the keynote. Construction of the in-house developed FPGA test system is based on SOC HW/SW co-verification technology. Algorithms for FPGA test and diagnosis covering all FPGA resources...
Due to the expected capacity crunch in DWDM optical networks, advanced optical modulation formats which offer high spectral efficiency are being increasingly deployed [1]. At the same time, a trend towards greater reconfigurability in the network is also taking place. Rapid reconfiguration of the optical network using dynamic circuit switching or optical packet switching allows the amplification bandwidth...
Orthogonal Frequency Division Multiplexing (OFDM) is widely used in both wired and wireless broadband communications systems and has more recently been the subject of much research as a modulation technique in optical communications systems [1]. OFDM's popularity stems from its high bandwidth efficiency due to the compact arrangement of the overlapping, but orthogonal, subcarriers; additionally the...
Performance improvement of a directly modulated 10Gb/s OFDM system by optical injection is shown experimentally over differing fibre lengths. The modulation and optical injection is performed using monolithically integrated Discrete Mode lasers.
Measurements of GPS STEC carried out at Hainan station, are used to derive vertical total electron content (VTEC). The ionospheric variability of TEC for different seasons is discussed; GPS TEC is compared with the NeQuick model. We have found that the diurnal variation of TEC for different seasons shows the winter anomaly and semiannual anomaly; in general the diurnal maximum is the highest in equinox...
We examine the time resolved bit error rate of a 10.7 Gbd DQPSK system using a fast switching slotted Fabry-Pérot transmitter. It is shown that error free transmission is possible within approximately 12 ns of a wavelength switching event.
Which handset feature is the most valuable to the customer of a mobile phone? This paper provides a hedonic analysis of mobile handsets in China, using 918 different handset models from 14 manufacturers launched from 2003 to 2008. Both basic and advanced characteristics of mobile handsets are incorporated in the hedonic regression model for measuring the corresponding shadow prices. In supplement...
This study examines multi-national data from Finland, Korea, the United States, Taiwan and Singapore to identify the factors that determine the purchase intention of mobile data services (MDS) and new mobile devices. A hybrid model incorporating factors from the means-end chain and cost-benefit equilibrium is tested on 3184 data with structural equation modeling. The results suggest that among the...
A novel three-section tunable slotted Fabry Perot laser has been examined. Characterizations of the linewidth, SMSR and RIN indicate that this type of laser may be a suitable source for dynamic networks employing advanced optical modulation formats.
A narrow linewidth slotted Fabry-Perot laser has been employed in a self-coherent optical transmission system. A comparison of the system performance of the tunable slotted laser with a SG-DBR laser has also been shown.
This paper presents two area and power-delay efficient state retention pulsed flops with scan and reset capabilities for sub-90 nm production low-power designs. The proposed flops also mitigate area overhead and integration complexity in SoC designs by implementing a single retention control signal and shared function/scan mode clock.
Image patches are fundamental elements for object modeling and recognition. However, there has not been a panoramic study of the structures of the whole ensemble of natural image patches in the literature. In this article, we study the structures of this ensemble by mapping natural image patches into two types of subspaces which we call "explicit manifolds " and "implicit manifolds...
Optimum sleep transistor design and implementation are critical to a successful power-gating design. This paper describes a number of critical considerations for the sleep transistor design and implementation including header or footer switch selection, sleep transistor distribution choices and sleep transistor gate length, width and body bias optimization for area, leakage and efficiency
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.