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Optimum Signal Constellation Design for Rotationally Symmetric Optical Channel with Coherent Detection
Modulation Coherent communications Optical channel capacity Rotationally symmetric optical channel
2015/5/21
We present an optimum signal-constellation design (OSCD) method to obtain the optimum probabilities and mass points by split-step method. The OSCD increases channel capacity by 1.02bits/channel use af...
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 ...
Generation of 432Gb/s Single-carrier Optical Signal by Format Conversion from QPSK to 16QAM
Fiber optical communications Fiber optics links subsystems
2015/5/21
We have proposed and experimentally demonstrated the generation of 432Gb/s (54Gbaud PM-16QAM) single-carrier optical signal by format conversion from QPSK to 16QAM.
160 Gb/s All-Optical Binary-to-Quaternary Amplitude Shift Keying Format Conversion
Nonlinear optics fibers Ultrafast nonlinear optics
2015/5/21
160Gb/s all-optical binary-to-quaternary amplitude shift keying format conversion is carried out in nonlinear optical fiber. This scheme, which also acts as a 2-bit digital-to-analog convertor, has be...
All-optical OOK to 16QAM Modulation Format Conversion Employing Nonlinear Optical Fiber Loop Mirror
Modulation Nonlinear optical signal processing
2015/5/21
We propose a novel all-optical modulation format conversion scheme from on-off-keying to 16 quadrature amplitude modulation using nonlinear optical loop mirror based on parametric amplification and cr...
Synchronization and NRZ-to-RZ conversion of 10 Gbit/s Ethernet-like data packets and subsequent optical TDM multiplexing to 330 Gbit/s
Fiber optics communications Buffers couplers routers switches multiplexers
2015/5/21
A time lens system synchronizes a 10G Ethernet asynchronous data frame to a local master clock and converts the NRZ-frame to an RZ-frame and multiplexes it into a 330 Gbit/s aggregated Optical TDM sig...
80-Gbit/s DQPSK Optical Tapped-Delay-Line Equalization using Finely Tunable Delays, Phases and Amplitudes
Fiber optics links and subsystems Nonlinear wave mixing
2015/5/21
We experimentally demonstrate a tunable and reconfigurable optical tapped delay line using conversion dispersion based delays with optical multicasting and multiplexing. After equalization, at BER of ...
OTDM-WDM Conversion Based on Time-Domain Optical Fourier Transformation with Spectral Compression
Optical communications Nonlinear optics four-wave mixing.
2015/5/21
We propose a scheme enabling direct serial-to-parallel conversion of OTDM data tributaries onto a WDM grid, based on optical Fourier transformation with spectral compression.Demonstrations on 320 Gbit...
Demonstration of 28-40-Gbaud, OOK/BPSK/QPSK Data- Transparent Optical Correlation with Control/Tunability over Time Delays, Phases and Number of Taps
Fiber optics communications Nonlinear optical signal processing
2015/5/21
We demonstrate a tunable optical correlator for amplitude and phase modulated signals up to 4-symbol-long patterns using conversion/dispersion based delays. We observed ~1-dB sensitivity penalty (at 1...
Compact broadband polarizer based on shallowly-etched silicon-on-insulator ridge optical waveguides
Compact broadband polarizer based shallowly-etched silicon-on-insulator ridge optical waveguides
2015/5/21
A novel type of optical polarizer based on silicon-on-insulator shallowly-etched ridge waveguide is designed,fabricated and characterized. The present polarizer is compact, broad-band, and easy-fabric...
High Efficiency Optical Switches with Heater-on-Slab (HoS) Structures
Couplers Switches Multiplexers Waveguides Slab
2015/5/21
We propose optical switches in which the heater is fabricated directly on the slab region of the rib waveguide. Two types of Heater-on-Slab (HoS) switches were investigated. In the first type, the sil...
Nonlinearity-Preserved Graphene/PVAc Composite in Optical Deposition for Fiber Mode-Locked Lasers
Nanomaterials Nonlinear optical devices Mode-locked laser
2015/5/21
We demonstrate efficient optical deposition of graphene onto optical fibers preserving its nonlinearity guaranteed by graphene/PVAc composite formation. Passive mode-locking of fiber laser producing p...
A Survivable Protection and Restoration Scheme using Wavelength Switching of Integrated Tunable Optical Transmitter for High Throughput WDM-PON System
Survivable Protection Restoration Scheme Wavelength Switching Integrated Tunable Optical Transmitter High Throughput WDM-PON System
2015/5/21
A survivable protection and restoration mechanism is proposed using wavelength switching of low-cost integrated tunable laser assembly to protect multiple fiber failures in a high capacity colorless W...
Next-generation Components for Optical Access Networks
Next-generation Components Optical Access Networks
2015/5/21
The components for next-generation access networks enable broader-band delivery by higher-speed operation, more wavelengths, and more integration. Economic considerations determine more and less likel...
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 ...