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Three-Dimensional Subcarrier-Multiplexed Nonbinary- LDPC-Coded Modulation Schemes Enabling Ultra High Speed Optical Communications
Fiber optics communications Modulation Low-density parity-check codes
2015/5/25
We propose nonbinary-LDPC-coded modulation schemes employing subcarrier-multiplexing and three-dimensional constellations. We improve coding gains of conventional PDM-M-QAM by 2.17dB and 2.92dB, for M...
First Experimental Demonstration of Nonbinary LDPC- Coded Modulation Suitable for High-Speed Optical Communications
Fiber optics and optical communications Modulation Low-density parity- check (LDPC) codes
2015/5/25
The first experimental demonstration of nonbinary-LDPC-coded optical transmission is presented. Using DQPSK, we can achieve >8dB and ~10dB net coding gains at the BER of 10 -6 in the absence and prese...
Layered Decoding of Nonbinary LDPC Codes Suitable for High-Speed Optical Communications
Optical communications Forward error correction Low-density parity- check codes
2015/5/25
We propose using layered update rule in decoding nonbinary LDPC codes. Only 10-15 iterations suffice for good performance. Also, for the same BER performance, it increases throughput by twofold compar...
Coded modulation schemes for optical transport are reviewed and coding of 4-D constellations is discussed including iterative demapping for soft-detection of polarization-switched QPSK which achieves ...
Adaptive Pulse Shaping for High-Speed Optical Communications
Pulse shaping Optical communications
2015/6/9
Through temporal pulse shaping at a repetition rate of 42.7 GHz, this paper demonstrates a simple method with applications in high-speed optical communications for adaptive, multi-type pulse shaping, ...
Ge-on-Si Photodetectors for Optical Communications
Ge-on-Si Photodetectors Optical Communications
2015/7/17
Ge-on-Si waveguide integrated photodetectors including Metal-Semiconductor-Metal (MSM), vertical PIN and lateral PIN diodes are reviewed.
Waveguide Nonlinear-Optic Devices for Optical Communications
Nonlinear optics Wavelength conversion Optical switching
2009/6/9
Waveguide-type quasi-phase matched (QPM) nonlinear-optic devices offer numerous applications in optoelectronics area. Wavelength converters based on QPM difference frequency generation (DFG) have adva...
Optical communications as a social infrastructure and its enabling technologies
Optical communications social infrastructure enabling technologies
2015/7/30
The optical fiber communications community experienced 30 years of rapid growth from 1970 to 2000, and a severe downturn lasting several years after 2000, but has been rising up again in recent years....
High-speed digital signal processing for optical communications
High-speed digital signal processing optical communications
2015/7/30
Today’s electronic processing capability means that it is now possible to perform extensive signal processing at the highest commercial data rates. In this tutorial we discuss the design and technolog...