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FPGA Verification of a Single QC-LDPC Code for 100 Gb/s Optical Systems without Error Floor down to BER of 10 -15
Fiber optics communications Optical communications
2015/5/25
We present FPGA-based emulation results of a single QC-LDPC code with 20% redundancy designed for applications in 100 Gb/s optical transmission systems. Error floor-free transmission can be achieved a...
Unaltered Optical Fiber as an Absolute Wavelength Reference for OFDR Systems
Interferometry Phase measurement
2015/5/25
We present a novel method of obtaining an absolute wavelength reference for OFDR measurements using Rayleigh backscatter from standard optical fiber. We report 1 GHz (8pm)accuracy.
Robust BPSK Impulse Radio UWB-over-Fiber Systems Using Optical Phase Modulation
Coherent communications Radio frequency photonics
2015/5/22
The impact of fiber dispersion on the performance of optical phase modulated impulse-radio-ultrawideband (IR-UWB) signals is experimentally investigated. 2Gbps BPSK IR-UWB over 78km fiber transmission...
Tolerance to nonlinearity of 40 Gb/s BPSK-based coherent solution over legacy systems based on non-zero dispersion- shifted fibers
coherent communication optical communication
2015/5/22
We experimentally assess the performance of coherent PDM-BPSK at 40Gb/s over non-zero dispersion-shifted fiber. The BPSK-based solution is found about 7.5dB more robust than the QPSK-based solution ag...
Wide-range BER Measurement Scheme by Estimating BER of Discarded Frames for 10 G-EPON Systems
Fiber optics communication Optical communication
2015/5/22
This paper describes a new BER measurement method obtaining the BER by estimating the number of error bits in discarded frames using the rate of discarded frames. The BER is obtained precisely by the ...
Over-Sampling based Burst-mode CDR Technology for High-speed TDM-PON Systems
Networks Optical communications
2015/5/22
We review recent progress of a over-sampling based burst-mode CDR as the key PMD device for supporting next-generation, 10Gbps capable TDM-PON systems. For the essence of circuit design, its burst-mod...
Experimental Study of Polarization-Switched-QPSK Subcarrier Modulation and Iterative Demapping on Optical OFDM Systems
multiplex achieved OCIS codes
2015/5/21
We demonstrate application of polarization-switched-QPSK subcarrier modulation together with soft-FEC LDPC coding and iterative demapping on OFDM lab system. 4.5dB OSNR-sensitivity improvement versus ...
Ultra-High Data-Rate 60 GHz Radio-over-Fiber Systems Employing Optical Frequency Multiplication and Adaptive OFDM Formats
Optical Communications Modulation
2015/5/21
This paper reviews 60-GHz radio-over-fiber systems employing optical frequency multiplication and adaptive OFDM signals with multi-level modulation formats to achieve an ultra-high data rate of up to ...
Field Demonstration of Bi-directional Millimeter Wave RoF Systems Inter-operable with 60 GHz Multi-gigabit CMOS Transceivers for In-building HD Video and Data Delivery
Optical communications Radio frequency photonics
2015/5/21
We demonstrate, for the first time, a bi-directional in-building radio-over-fiber access network to deliver multi-gigabit, high-definition video and data services using all-optical conversion at the h...
Mitigation of Nonlinearities in Optical Transmission Systems
Mitigation Nonlinearities Optical Transmission Systems
2015/5/21
Nonlinear compensation with digital back-propagation can improve Q-factor by more than 1dB, proven by experiments. Simplification of propagation model is the key to suppress circuit size, whereas stra...
Cost-Effective and Power-Efficient Extended-Reach WDM/TDM PON Systems
Cost-Effective Power-Efficient Extended-Reach WDM/TDM PON Systems
2015/5/21
We propose a remote channel combine/split module for extended-reach WDM/TDM PON systems to significantly reduce initial investment with saving up to 60% and achieve good power efficiency when fully lo...
CMOS Integrated Nanophotonics – Enabling Technology for Exascale Computing Systems
CMOS Integrated Nanophotonics Enabling Technology Exascale Computing Systems
2015/5/20
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, ...
Systems Aspects of Optical Technologies for Use in Datacommunications
Systems Aspects Optical Technologies Datacommunications
2015/5/20
This paper reviews the development of system techniques using advanced modulation formats that have arisen in recent years for use in datacommunications. Simulations are provided to allow comparison o...
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
2015/5/20
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...
A Novel Dispersion and PMD Tolerant Clock Phase Detector for Coherent Transmission Systems
Novel Dispersion PMD Tolerant Clock Phase Detector Coherent Transmission Systems
2015/5/20
A novel clock phase detector is presented and shown to be tolerant to chromatic dispersion and PMD. The phase detector can be used in a clock recovery circuit for demodulation of 100 Gb/s coherent tra...