搜索结果: 1-15 共查到“光信息技术 QPSK”相关记录36条 . 查询时间(0.046 秒)
在40 Gbit/s相干偏振复用正交相移键控（QPSK）传输系统中,为了补偿由于光纤中非线性效应引起的传输信号损伤,采用了基于Manakov方程的反向传播非线性补偿算法.传统的基于标量非线性薛定谔方程（NLSE）的反向传播算法忽略了偏振模色散（PMD）的作用,因此在偏振复用系统中不能补偿由于PMD引起的信号损伤|而基于Manakov方程的数字信号处理方法能够对PMD与克尔非线性效应的耦合作用进行补...
Fast Parallelized Simulation of 112 Gb/s CP-QPSK Transmission Systems using Stratified Monte-Carlo Sampling
Fiber optics communications Coherent communications
2015/5/26
A novel parallelized implementation of the split-step Fourier method on graphics processing units was developed. The combination of Monte-Carlo simulations with single and double precision yields a sp...
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 ...
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...
Polarization Insensitive and Subchannel-preserved Wavelength Conversion of 432-Gb/s Polarization Multiplexed O-OFDM QPSK Signals Using Co-polarization Pumps
Polarization Insensitive Subchannel-preserved Wavelength Conversion Polarization Multiplexed O-OFDM QPSK Signals Co-polarization Pumps
2015/5/21
By employing co-polarization dual-pump scheme, polarization insensitive and subchannel-preserved wavelength conversion of 432-Gb/s, dual-peak polarization-multiplexed O-OFDM QPSK signals has been real...
QPSK Phase and Amplitude Regeneration at 56 Gbaud in a Novel Idler-Free Non-Degenerate Phase Sensitive Amplifier
QPSK Phase Amplitude Regeneration Novel Idler-Free Non-Degenerate Phase Sensitive Amplifier
2015/5/20
We introduce a novel input-idler-free non-degenerate phase sensitive amplifier (PSA) configuration and use it for simultaneous phase and amplitude regeneration of quadrature phase shift keyed (QPSK) s...
21-GHz Single-Band OFDM Transmitter with QPSK Modulated Subcarriers
Fiber optics communications Modulation
2015/5/20
We present a single-band OFDM transmitter that allows the generation of signals with a bandwidth of up to 21 GHz. Transmission experiments over up to 641 km without optical disper-sion compensation de...
Real-Time Evaluation of Optical Nonlinear Effects on 112Gbps PM-QPSK Signal in Dispersion Managed Links
Optical Communications Coherent Communications
2015/5/20
We demonstrate the impact of nonlinear effects on dispersion managed links with a FPGA-based 112Gbps real-time receiver. We clarify that PM-RZ-QPSK provides superior robustness, whereas PM-NRZ-QPSK of...
100G Transoceanic Length Transmission with High Spectral Efficiency Using Bandwidth Constrained PDM-QPSK
100G Transoceanic Length Transmission High Spectral Efficiency Bandwidth Constrained PDM-QPSK
2015/5/20
We review our recent 100G, high spectral efficiency, transmission experiments over transoceanic and regional distances. Transmitter pre-filtering together with a MAP detection algorithm can significan...
Scaling 112 Gb/s PDM-QPSK Hybrid Optical Networks
112 Gb/s Hybrid Optical Networks PDM-QPSK
2015/5/18
We experimentally and numerically determined the nonlinear transmission impairments for a hybrid PDM-QPSK/OOK network. Results are quantified via a nonlinear phase metric and can be used as design rul...
Digital Lightpath Label Transcoding for Dual-Polarization QPSK Systems
Digital Lightpath Label Transcoding QPSK System
2015/5/15
We introduce digital lightpath labeling for DP-QPSK transmission, using novel binary encoding to embed a polarization-shift-keyed subchannel. An integrated inline polarimeter powers a compact label re...
Optimization of Carrier Phase Estimation for 112 Gbit/s PM-QPSK Systems
Gbit/s PM-QPSK System Optimization Carrier Phase
2015/5/15
For 112 Gbit/s PM-QPSK systems, the residual phase noise auto-correlation function with a lag of N can serve as a suitable monitor signal for optimizing the averaging in carrier phase estimation algor...
Comparison of RZ and NRZ Formats in 112-Gb/s PDM- QPSK Long Haul Coherent Transmission Systems
Coherent Transmission Systems PDM- QPSK RZ\NRZ Formats
2015/5/15
We show that 112-Gb/s PDM-QPSK coherent transmission systems with RZ pulse shape have better tolerance to ROADM filtering than NRZ, and time-interleaved RZ-PDM-QPSK outperform NRZ-PDM-QPSK in nonlinea...
Unrepeatered Transmission over 300 km of NZDSF Using 8x112-Gb/s Time-Interleaved RZ-PDM-QPSK with Coherent Detection and Forward Raman Pumping
Unrepeatered Transmission Coherent Detection RZ-PDM-QPSK
2015/5/15
We show that time-interleaved RZ-PDM-QPSK and forward Raman pumping can increase the performance of a 112-Gb/s PDM-QPSK coherent unrepeatered transmission system over 300 km of NZDSF by more than 2 dB...
432Gbit/s O-OFDM QPSK signal transmission over 400km SMF-28 with EDFA-only amplification
O-OFDM QPSK signal transmission
2015/5/15
432Gbit/s O-OFDM QPSK transmitter has been proposed and experimentally demonstrated.After transmission over 400km standard single-mode fiber (SMF), the measured BER is smaller than 2 ×10 -5 .