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Adaptive Transmission of Variable-Rate Data over a Fading Channel for Energy-Efficiency
Adaptive Transmission Variable-Rate Data Fading Channel Energy-Efficiency
2015/8/17
Adapting to a time-varying channel to maximize the average information rate for a given power constraint is a well-understood problem. Important studies (e.g., [I], [Z], [3]) have developed optimal ra...
Demonstration of Baud-Rate-Variable and Channel- Spacing-Tunable Demultiplexing of 10-40-Gbaud OFDM Subcarriers using a Multi-Tap Optical DFT
Fiber optics links subsystems Nonlinear wave mixing
2015/5/25
We experimentally demonstrate a tunable and reconfigurable optical DFT to demodulate 10-40-Gbuad OFDM with 2/3/4 subcarriers at 20/40GHz frequency spacing. Average power penalty of ~7 dB at BER of 10 ...
Variable Gate Width, All-Optical Sampling using Electroabsorption Modulator for Optical Performance Monitor
Nonlinear optical signal processing Semiconductor nonlinear optics including MQW Fiber optics communications
2015/5/25
Variable gate width, all-optical sampling using an electroabsorption modulator is pro- posed for a multi-bit rate, optical performance monitor. The discrepancy between waveform quality and bit error r...
Delay-Asymmetric Nonlinear Loop Mirror for Bit-Rate Variable RZ-to-NRZ Format Conversion
Delay-Asymmetric Nonlinear Loop Mirror it-Rate Variable RZ-to-NRZ Format Conversion
2015/5/15
We demonstrate RZ-to-NRZ pulse format conversion at tunable bit-rates using a delay-asymmetric nonlinear loop mirror. The input RZ-OOK signals are converted to NRZ-OOK signals with a power penalty les...
High-Output Saturation Power Variable Confinement Slab- Coupled Optical Waveguide Amplifier
High-Output Saturation Power Variable Confinement Slab- Coupled Optical Waveguide Amplifier
2015/5/15
A variable optical confinement concept was incorporated into a slab-coupled optical waveguide amplifier to increase output saturation power. This amplifier demonstrates an unsaturated gain of 21.1 dB ...
Tunable and variable clock generation up to 1.2 THz by filtering an actively mode-locked 42.5 GHz Quantum Dash Fabry-Perot laser with a reconfigurable filter
Optical communications Quantum dot devices
2015/6/10
We report on the generation of an optical clock up to 1.2 THz using a Quantum Dash mode-locked laser and a spectral filter, selecting two or three lines, which are separated by the desired spacing.
On the Spectrum-Efficiency of Bandwidth-Variable Optical OFDM Transport Networks
Spectrum-Efficiency Bandwidth-Variable Optical OFDM Transport Networks
2015/6/10
We investigated the high spectrum efficiency property of the bandwidth-variable optical OFDM (BV-OOFDM) transport networks. In contrast to mixed-line-rate (MLR) networks, BV-OOFDM enables flexible all...
Implementation of High-speed Buffer Management for Asynchronous Variable-length Optical Packet Switch
Networks Optical communications
2015/6/10
We develop an FPGA-based buffer management hardware with 8 input ports, which implements a parallel and pipeline mechanism to support over-200-Mpacket/s/port asynchronous variable-length optical packe...
Use of discrete modulation and a continuous wave local oscillator in a 24 km continuous variable quantum key distribution system
Quantum cryptography Quantum communications
2015/6/10
We implement an experimental continuous variable quantum key distribution system over 24 km of optical fiber that uses discrete signaling and a continuous wave local oscillator. A secure key rate of 3...
Demonstration of Bit Rate Variable ROADM functionality on an Optical OFDM Superchannel
Coherent communications Multiplexing
2015/6/9
We demonstrate a bit rate variable add- and drop function performed on an optical OFDM superchannel signal by optical filtering and superposition of OFDM subbands and the application of different modu...
A Real-Time Asynchronous Dynamically Re-Sizable Optical Buffer for Variable Length 40Gbps Optical Packets
Buffers couplers routers switches multiplexers Networks packet-switched
2015/6/8
We demonstrate a 40Gbps dynamically re-sizable optical buffer capable of storing packets of lengths ranging from 40 to 800 bytes. Packet recovery measurements greater than 95% demonstrate a dynamic op...
Widely Wavelength-Tunable and Pulsewidth-Variable Harmonically Mode-Locked Short-Cavity Fiber Ring Laser Using a Bismuth-Oxide-Based Highly Nonlinear Erbium-Doped Fiber
Wavelength-Tunable Pulsewidth-Variable Harmonically Bismuth-Oxide-Based Highly Nonlinea Erbium-Doped Fiber
2015/7/16
We demonstrate a stable 10GHz harmonically modelocked laser employing a 151cm-long bismuth-based highly nonlinear erbium-doped fiber and a bandwidth-variable tunable filter. The wavelength tuning rang...
Bit-Rate-Variable and Order-Switchable Optical Multiplexing of 160- Gbit/s PRBS Data Using Tunable Optical Delays
Bit-Rate-Variable Order-Switchable Optical Multiplexing PRBS Tunable Optical Delays
2015/7/15
We experimentally demonstrate 160-Gbit/s PRBS data multiplexing with tunable rate and order using switchable optical delays and conversion/dispersion based tunable optical delay. Less than 9 dB penalt...
Demonstration of Novel Spectrum-Efficient Elastic Optical Path Network with Per-Channel Variable Capacity of 40 Gb/s to Over 400 Gb/s
Spectrum-Efficient Elastic Optical Path Network Per-Channel Variable Capacity
2015/8/6
We demonstrated, for the first time, a novel spectrum-efficient elastic optical path network for 100 Gb/s services and beyond, based on flexible rate transceivers and variable-bandwidth wavelength cro...
Variable Optical Attenuation using space-selectively crystallized fiber with second-order optical nonlinearity
Variable Optical Attenuation crystallized fiber second-order optical nonlinearity
2015/8/6
We have fabricated glass fibers with nonlinear crystalline phase in clad area by laser irradiation, and demonstrated variable optical attenuation by electro-optic effect using the space-selectively cr...