Loading [MathJax]/extensions/MathZoom.js
Baojian Wu - IEEE Xplore Author Profile

Showing 1-25 of 64 results

Filter Results

Show

Results

Efficient and precise monitoring on mode-coupling-induced crosstalk (XT) is crucial for the operation of mode-division multiplexing (MDM) systems, particularly for optimizing digital signal processing (DSP) parameter configurations and maintaining stable transmission performance. In this paper, we propose a mode pilot-tone (MPT) monitoring scheme and investigate its performance for XT (MPT-XT) mon...Show More
This paper presents a novel optical performance monitoring (OPM) scheme based on reservoir computing (RC) and Resnet network for monitoring the optical signal-to-noise ratio (OSNR) of few-mode transmission channels, without the need for any demodulation process. By using 300 RC nodes, the number of floating-point operations (FLOPs) is reduced by 75%, with almost no change in prediction accuracy co...Show More
Degree of polarization (DOP) is often used to measure the polarization properties of single-mode signals and the classical entanglement of orbital angular momentum (OAM) modes or vector modes. The paper investigates the ensemble DOP (eDOP) of mode division multiplexing (MDM) signals consisting of linearly polarized (LP) modes in an optical fiber, which is dependent on their respective DOPs, powers...Show More
We propose the vector-eigenmode decomposition through the residual network model by using only intensity-distributed image. The reductions on computation workloads and prediction times are respectively 822M and 10 percent, while maintaining the accurate decomposition output. © 2024 The Author(s)Show More
We introduce the generative adversarial networks (GANs) into the application of the free-space laser communication, performing the laser-spot image restoration with the computervision method. After the training of our model is completed, the average Pearson correlation coefficient, average peak signal-to-noise ratio and mean-square-error of the generated restored laser spot image reach 0.964, 27.7...Show More
Mode exchange (ME) can effectively improve the utilization of network resources in short-distance mode division multiplexing (MDM) communication systems. In this paper, we proposed a method for the ME of dual-polarization (DP) signals using a single spatial light modulator (SLM) along with one half-wave plate (HWP) and two mirrors, without additional polarization diversity devices. The channel exc...Show More
We investigate the mode coupling in the few-mode erbium-doped fiber wound around the piezoelectric fiber stretcher by the experiments and theoretical analysis. By adjusting the driving voltage, the signal-to-crosstalk ratio (SXR) of LP01, LP11e and LP11o modes can be further improved by 0.62dB, 1.03dB and 1.32dB, respectively. The theoretical SXR curves are also obtained from the mode-coupled FM-E...Show More
An all-fiber few-mode erbium-doped fiber amplifier (FM-EDFA) is built up for simulating an aperiodic multi-stage amplification and 3270km-long four mode transmission with the overall DMG of about 2 dB.Show More
We set up the joint simulation system for the mega-constellation, performing comprehensive investigations on dynamic routing and transmission performance. The best delay result and received quality were simultaneously observed through the Dijkstra strategy.Show More
We investigated differential mode power (DMP) of the all-fiber few-mode recirculating-loop system composed of a three-mode erbium-doped fiber amplifier (3M-EDFA) and 12km-long three-mode fiber. The DMP is less than 4.05dB after passing through 17 round-trips.Show More
We experimentally demonstrate an all-fiber few-mode recirculating loop system (AF-FMRLS) with the ultralow-cost transfer-learning multi-input and multi-output (TL-MIMO) equalizers. 20 round trips were tested with the training-cost reduction up to 66.7% to 100%.Show More
We demonstrate experimentally an all-fiber few-mode recirculating loop system (AF-FMRLS), enabling investigating the long-haul (looped) transmission performance of the mode-division multiplexing (MDM) technology. We locate the slowly squeezed area in the multi-input and multi-output (MIMO)-equalization algorithm which is suitable for the compensation operation of the proposed AF-FMRLS, significant...Show More
We carry out the detailed investigations on the 6-mode 7-core SDM transmission system using the C+L-band WDM channels. The high-quality recovered signals with the EVM of less than 5.77% is obtained through the optimized MIMO equalization with the self-recycling training approach.Show More
The dispersion compensation is thoughtfully investigated in the nonlinear-optical loop mirror (NOLM)-based optical reservoir scheme. The BER of lower than 10−3 for P AM-4 signals is achieved at the whole C+L band through optimizing the training length and the neuron's number.Show More
We review our recent progress on the all-optical signal processing technologies using the nonlinear bidirectional semiconductor optical amplifier (NB-SOA) unit, enabling the functions of the optical phase conjugation (OPC) conversion and the phase-preserving amplitude regeneration for QPSK signals at the same time.Show More
We thoughtfully investigate the feasibility of reducing the mode-coupling caused crosstalk by optimizing the practical parameters of the few-mode fiber (FMF), based on the linear coupling theory. According to our simulation results, the low crosstalk FMF could be achieved with the small fiber core, the low refractive-index (RI) related parameters, the long operating-wavelength and the low core-ecc...Show More
The paper focuses on the tunability of DMG for FM-EDFAs, which helps to realize the zero DMG or compensate for the mode-dependent loss of fiber links. An optimal method is proposed to design the EDFAs with tunable DMG by sweeping the EDF’s length and the forward-to backward pump power ratio. The relevant experiment is also performed for tunable DMG.Show More
We thoughtfully investigate the optical phase conjugation (OPC) process in a polarization-selected orthogonal-pump semiconductor optical amplifier (PSOP-SOA) subsystem, enabling error-free signal conversion with the optical signal-to-noise ratio (OSNR) of up to 16dB. © 2021 The Author(s)Show More
A self-recycling training equalizer is thoughtfully investigated in a 2.4Tbit/s PDM-16QAM nonlinear spatial-division multiplexing (SDM) transmission system, achieving the signal-to-noise ratio (SNR) improvement of up to 8.26dB with a 62.96% reduction of the training data. © 2021 The Author(s)Show More
We study the Mach-Zehnder interferometer (MZI) on chip and present a phase-preserving amplitude regeneration scheme using it. The error vector magnitude (EVM) for optical 16QAM signals can be reduced from 12.6% to 6.5%. © 2021 The Author(s)Show More
We experimentally investigate the phase-preserving amplitude regeneration based on the optical phase conjugation process in a polarization-selected orthogonal-pump semiconductor optical amplifier (PSOP-SOA) subsystem, enabling the signal-to-noise ratio (SNR) improvement of 1.84dB for QPSK signals.Show More
We present a theoretical model of few-mode erbium-doped fiber amplifiers with complex mode fields and show that a tunable differential mode gain (DMG) can be realized by changing the components of $\text{LP}_{11\mathrm{e}, x}$ and $\text{LP}_{11\mathrm{o}, y}$.Show More
We propose a nonlinear-optical loop mirror (NOLM)-based reservoir computing scheme to perform the noise compensation for a space-division multiplexing (SDM) transmission system, achieving the maximum Q2 of the recovered signal up to 65.52dB.Show More
A 20 Gbit/s spatial division multiplexing (SDM) transmission platform is built with the two-mode fiber (TMF) of 12 km length. And the transmission performance of this platform is investigated through measuring the dependency between the signal quality and the launched power. A novel voltage-driven fiber expander-based crosstalk suppression scheme is proposed, and a 5.51 dB Q-factor improvement is ...Show More