搜索结果: 76-90 共查到“光学工程 Modulation”相关记录144条 . 查询时间(0.041 秒)
Polar Coordinate Transformation based Dual Binary-Drive QPSK Modulation
Optical communications Modulation
2010/6/5
QPSK signal generation by a dual binary-drive Mach-Zehnder modulator employing polar coordinate transformation was experimentally demonstrated for cost-effective digital coherent transceivers.Toleranc...
Coded Polarization-Multiplexed Iterative Polar Modulation (PM-IPM) for Beyond 400 Gb/s Serial Optical Transmission
Fiber optics and optical communications Modulation Iterative polar modulation Forward error correction Low-density parity-check codes
2010/6/5
We propose a coded polarization-multiplexed iterative polar modulation (PM-IPM) as an enabling coded-modulation scheme for beyond 400Gb/s serial optical transmission. We demonstrate that the proposed ...
Optimization of Cost Efficient Multilevel-ASK Modulation Formats under the Constraint of Chromatic Dispersion
Modulation Fiber optics communications
2010/6/5
Due to their narrow spectrum, multilevel modulation ASK-formats can increase the chromatic dispersion tolerance of optical systems. Since they suffer more from inter-symbol interference than binary si...
Advanced Coherent Modulation Formats and Algorithms: Higher-Order Multi-Level Coding for High-Capacity System Based on 100Gbps Channel
Coherent communications Fiber optics communications
2010/6/5
We review recent technology advances in high-capacity 100Gbps system using polarization-division-multiplexed (PDM) eight-level coding (8PSK and 8QAM) and DSP-based intradyne detection.Research activit...
Continuous Phase Modulation as an Alternative to QPSK for 100 Gb/s Optical Links
Fiber optics communications Coherent communications
2010/6/5
Constant envelope formats including CPM may reduce the impact of nonlinear impairments arising from intensity variations and the associated nonlinear phase noise. We quantify the advantages of CPM ver...
100GbE Optical Transport, Appropriate Modulation Formats, and Impact on Deployed Transport Networks
100GbE Optical Transport Appropriate Modulation Formats Impact Deployed Transport Networks
2010/6/5
We review the system requirements for 100GbE optical transport and compare possible technical solutions. Our experience, derived from modeling, laboratory experiments and field trials on deployed tran...
Quantum Blackbox Model for Electro-Optical Phase Modulation
Phase Modulation Quantum optics
2010/6/4
We present, for the first time, a blackbox model characterizing the quantum optical phase modulation operation in terms of a unitary scattering operator which excludes the unphysical negative frequenc...
166 Gb/s PDM-NRZ-DPSK modulation using thin-LiNbO 3 -substrate modulator
Phase modulation Modulators
2010/6/4
The modulation of a 166-Gb/s PDM-NRZ-DPSK signal is demonstrated using a thin-LiNbO 3 -substrate modulator. The use of a 0.1-mm-thick substrate and a ridge-type waveguide im-proves the optical respons...
Multi-Band Power Allocation in AMOOFDM High data rate NG-PON downlink transmission direct modulation of linear laser
Fiber optics communications Modulation
2010/6/4
Multi-band power allocation for NG-PON downlink transmission is experimentally demonstrated when implementing AMOOFDM with direct modulation of a linear laser. Multi-user power and bit-allocation allo...
240-Gb/s Polarization-Multiplexed 64-QAM Modulation and Blind Detection Using PLC-LN Hybrid Integrated Modulator and Digital Coherent Receiver
Polarization-Multiplexed 64-QAM Modulation Blind Detection PLC-LN Hybrid Integrated Modulator Digital Coherent Receiver
2009/7/20
We demonstrate 240-Gb/s 64-QAM signal modulation and detection. 20-Gbaud 64-QAM signals are generated employing hybrid integration of silica PLCs and LiNbO 3 phase modulators, and demodulated with a d...
160 Gb/s Cross Gain Modulation in Quantum Dot SOA at 1550 nm
Cross Gain Modulation Quantum Dot SOA
2009/7/20
We report, for the first time, pattern-effect free wavelength conversion in a QD-SOA at 160 Gb/s in C-band. Very fast (10ps) 85% gain recovery and the use of a slightly detuned blue-shifted filter all...
Modeling of Signal-Noise Interactions in Nonlinear Fiber Transmission with Different Modulation Formats
Modeling Signal-Noise Interactions Nonlinear Fiber Transmission
2009/7/20
We describe the physical principles behind nonlinear signal-noise interaction and its impact on dispersion-managed optical transmission system performance for both intensity and phase modulated signal...
Digital Modulation Challenges for High-capacity Optical Transport Network with 100Gbps Channels and Beyond
Digital Modulation Challenges High-capacity Optical Transport Network Channels
2009/7/20
Digital signal processing technologies have great advantages for realizing the high-capacity Optical Transport Network based on over 100 Gbps channels. Novel no-guard-interval OFDM with frequency doma...
Investigation of DGD and Delay-Line Interferometer Phase Tolerance of Integrated Receiver Module for 86 Gb/s NRZ-DQPSK modulation
DGD Delay-Line Interferometer Phase Tolerance Integrated Receiver Module NRZ-DQPSK modulation
2009/7/20
We investigate the performance of a free-space DLI integrated receiver for 43 Gbaud/s NRZ-DQPSK.The DGD tolerance (1dB penalty) is quantified at 47% of the baudrate, and the DLI phase tolerance (1dB p...
Novel Optical Fiber Identification Method for PONs Based on Polarization Modulation Caused by Pressure-Induced Retardation
Optical Fiber PONs Polarization Modulation Caused Pressure-Induced Retardation
2009/7/17
We proposed a new technique for identifying fibers in PONs using polarization-modulation caused by a transverse force. We demonstrate our method using conventional and bend-insensitive fibers in a bra...