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CMOS Integrated Nanophotonics – Enabling Technology for Exascale Computing Systems
CMOS Integrated Nanophotonics Enabling Technology Exascale Computing Systems
2011/5/20
CMOS Integrated Nanophotonics allows ultra-dense monolithic single-chip integration of optical and electrical functions. This technology can enable future Exaflops supercomputers by connecting racks, ...
Low-Complexity Two-Stage Carrier Phase Estimation for 16-QAM Systems using QPSK Partitioning and Maximum Likelihood Detection
Low-Complexity Two-Stage Carrier Phase Estimation 16-QAM Systems QPSK Partitioning Maximum Likelihood Detection
2011/5/20
A feedforward carrier phase estimation algorithm using a modified QPSK partition approach followed by maximum-likelihood (ML) detection is proposed. Results demonstrate complexity reduction by more th...
Impact of RF Noise on Transmission Performance of Multiband OFDM UWB over Fiber Systems
RF Noise Multiband OFDM UWB over Fiber Systems Transmission Performance
2011/5/15
We investigate the performance of multiband OFDM ultra wideband (UWB) signal over fiber system considering the impact of RF noise. A compensation technique is proposed to reduce RF noise impact.
Volterra Filtering for Nonlinearity Impairment Mitigation in DP-16QAM and DP-QPSK Fiber Optic Communication Systems
P-QPSK Fiber Optic Communication Systems Nonlinearity Impairment Volterra Filtering
2011/5/15
A reduced nonlinear Volterra filter is applied to 14 Gbaud DP-16QAM and 28 Gbaud DP-QPSK systems for nonlinearity mitigation. An increased reach of 500 km and 1200 km,respectively, is achieved compare...
Key Roles of Green Technology for Access Network Systems
General Key Roles Technology Access Network Systems
2010/6/9
ICTs are expected to reduce their own equipment and service energy consumption and mitigate GHG emissions through use of ICTs in other relevant sectors. Standardization activities of green ICTs in ITU...
Photonic Generation and Processing Technologies for Converged Ultra-High Throughput Fiber-Wireless Systems
Fiber Optics Communications Networks
2010/6/9
We discuss the recent advances of key photonic generation and processing technologies toward high flexibility, integration, and spectrum efficiency for delivering ultra-high throughput wireless servic...
Arbitrary-frequency Optical Millimeter-wave Generation for Radio over Fiber Systems
Fiber Optics Communications Networks
2010/6/9
The arbitrary-frequency optical microwave or millimeter (mm)-wave signals, ranging from 25 to 325 -GHz with 25-GHz spacing, can be simultaneously generated based on the generation technology of multi-...
Broadband radio over fiber systems, which can simultaneously distribute multiple wireless services and enable remote sensing, are reviewed. The systems are used to demonstrate improved remote passive ...
Impact of Pulse Shaping on the SPM Tolerance of Electronically Pre-compensated 10.7 Gb/s DPSK Systems
Fiber optics communications Modulation
2010/6/9
Pulse shaping for electronic pre-compensation systems using differential phase shift keying modulation is experimentally shown to provide a 1.9 dB increase of the nonlinearity threshold.
Multi-service Multi-carrier Broadband MIMO Distributed Antenna Systems for In-building Optical Wireless Access
Optical communications Radio frequency photonics
2010/6/4
A novel broad spectrum band-shifting technique is experimentally demonstrated to simultaneously transmit broadband (500MHz to 3 GHz) multi-service, multi-carrier MIMO signals for in-building radio-ove...
Fiber Nonlinearity Mitigation in 428-Gb/s Multiband Coherent Optical OFDM Systems
Fiber optics communications Coherent Communications
2010/6/4
We propose DFT-spread (DFT-S) OFDM within each sub-band of multiband-CO-OFDM to mitigate fiber nonlinearity. For 1000-km standard-single-mode-fiber transmission at 420-Gb/s, 32-band DFT-S CO-OFDM outp...
Advances in Fibers and Transmission Line Technology for Long Haul Submarine Systems
Advances Fibers Transmission Line Technology Long Haul Submarine Systems
2009/7/20
We review recent development of optical fibers for submarine networks. Further we discuss how new signal formats and increased bit rates change the requirements for fibers and challenge the balance be...
The future of Submarine Systems - Where Do Upgrades Fit?
future Submarine Systems Upgrades Fit
2009/7/20
There are many technologies and techniques being considered for future builds; this paper will consider how some of these might impact the potential for third party upgrades.
Experimental Demonstration of Nonlinear Electrical Equalizer to Mitigate Intra-channel Nonlinearities in Coherent QPSK Systems
Nonlinear Electrical Equalizer Mitigate Intra-channel Nonlinearities Coherent QPSK Systems
2009/7/20
We experimentally demonstrate the mitigation of intra-channel nonlinearities in 10GBaud coherent quadrature phase shift keying systems via nonlinear electrical equalizer based on Volterra theory. The ...
Realization of Optical OFDM Using Time Lenses and Its Comparison with Conventional OFDM for Fiber-optic Systems
Realization Conventional OFDM Fiber-optic Systems
2009/7/17
It is proposed to use Fourier transforms in optical domain using time lenses both at transmitter and at receiver to realize optical OFDM. Results show that coherent OFDM systems have higher nonlinear ...