A5034700872- Optical Network Technologies
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Advanced Fiber Laser Technologies
- Advanced Optical Network Technologies
- Advanced Fiber Optic Sensors
- Neural Networks and Reservoir Computing
- Semiconductor Lasers and Optical Devices
- PAPR reduction in OFDM
- Acoustic Wave Resonator Technologies
- Image and Video Stabilization
- Advanced Computing and Algorithms
- GNSS positioning and interference
- Graph Labeling and Dimension Problems
- Indoor and Outdoor Localization Technologies
- Inertial Sensor and Navigation
- Power Line Communications and Noise
- Blind Source Separation Techniques
- Magneto-Optical Properties and Applications
- Advanced Wireless Communication Techniques
- Wireless Communication Networks Research
Huazhong University of Science and Technology
2022-2024
Wuhan National Laboratory for Optoelectronics
2022-2024
Optica
2023
We propose and demonstrate bi-directional (BiDi) self-homodyne coherent detection (SHCD) system experimentally, in which the multiple input output free (MIMO-free) digital signal processing (DSP) is achieved with help of BiDi-operated adaptive polarization controller (APC). Since wandering local oscillator (LO) relevant to that counter-propagating within same fiber, APC can realize tracking compensation for LO simultaneously. The power-consuming 2x2 MIMO DSP, be eliminated our proposed BiDi...
Tunable all-optical wavelength conversion (AOWC) within 151 nm bandwidth is demonstrated in a thin-film periodically poled lithium niobate (PPLN) waveguide, which utilizes the cascaded second-harmonic generation and difference-frequency (cSHG/DFG) process. Also, same AOWC of 92-Gb/s 16-ary quadrature amplitude modulated (16-QAM) signal C-band successfully achieved. For Bit-error ratio (BER) measurements, we obtain negligible optical signal-to-noise (OSNR) penalty (<0.2 dB) for converted...
Utilizing the all-optical clock delivery and synchronization, we successfully achieved baud-rate sampled 40-Gbaud DP-16QAM self-homodyne transmission with 1.92 Tbps aggregated capacity over 3.5-km MCF, yielding a promising solution for DSP-free coherent co-packaged optics.
In the digital subcarrier multiplexing (DSM) system, absence of guard bands between adjacent low-baud-rate subcarriers exacerbates impact frequency offset (FO) on system performance. Hence, FO must be removed before de-multiplexing with root raised cosine (RRC) filters, as well chromatic dispersion compensation (CDC). However, traditional estimation (FOE) algorithms for single carrier (SC) are not suitable. this article, we propose an in-advance FOE and (FOC) method that uses a specially...
To monitor the health of fiber network and its ambient environment in densely populated access/metro areas, this Letter, an endogenous distributed acoustic sensing (DAS) has been proposed achieved a coherent digital subcarrier multiplexing (DSCM) system. Rather than specially allocating probe general integrated communication schemes, fractional Fourier transformed (FrFT) training sequence (TS) designated for time/frequency synchronization DSCM communications repurposed sensing. While...
Enabling communication networks with sensing functionality has attracted significant interest lately. The digital subcarrier multiplexing (DSCM) technology is widely promoted in short-reach scenarios for its inherent flexibility of fine-tuning the spectrum. Its compatibility large-scale as-deployed coherent architectures makes it particularly suited cost-sensitive integrated and applications. In this paper, we propose a scheme spectrally integrating linear frequency modulated signal into...
We propose a carrier polarization fading free self-coherent transmission architecture based on optical injection locking and scrambler. The results prove that the utilization of two modules can ensure stability system.
To comprehensively assess the conditions of an optical fiber communication system, it is essential to implement joint estimation following four critical impairments: nonlinear signal-to-noise ratio (SNR NL ), (OSNR), chromatic dispersion (CD), and differential group delay (DGD). However, current studies only achieve identifying a limited number impairments within narrow range, due lack high-performance computing algorithms unified representation impairments. address these challenges, we...
By introducing the Fermat number transform into chromatic dispersion compensation and adaptive equalization, computational complexity has been reduced by 68% compared with con?ventional implementation. Experimental results validate its transmission performance only 0.8 dB receiver sensitivity penalty in a 75 km-40 GBaud-PDM-16QAM system.
We propose an endogenous DAS in P2MP digital subcarrier coherent transmission systems. By redesigning and reusing FrFT-based synchronization pilots, vibrations up to 12 kHz are successfully detected over 10-km-long fiber, along with 100-Gb/s 16QAM transmission.
Nonlinear equalization (NLE) is essential for guaranteeing the performance of an optical network (ON). Effective NLE implementation relies on key parameters transmission link, including modulation format (MF) and launch power. As ONs become more agile, fiber need to be adaptive relevant routing condition. Therefore, successful realization awareness (TA). Although machine learning-enabled monitoring (OPM) has been extensively investigated in past few years, current algorithms cannot...
Cost-efficient coherent-lite solutions are highly desired in short-reach datacenter networks (DCNs). Self-homodyne coherent (SHC) scheme holds promise due to its compatibility with legacy infrastructure and substantially reduced cost power dissipation. Unfortunately, the inherent loss, resulting from signal modulation propagations of both remote local oscillator (LO), poses a significant limitation on link budget hinders application metro-DCNs. In this paper, we propose unleash multi-channel...
We demonstrate a novel inter-core crosstalk sense-and-compensate method with the CAZAC sequence as frame header in crosstalk-limited IMDD SDM system, achieving 2.5 dB sensitivity improvement and ensuring quality of transmission.
Utilizing the all-optical clock delivery and synchronization, we successfully achieved baud-rate sampled 40-Gbaud DP-16QAM self-homodyne transmission with 1.92 Tbps aggregated capacity over 3.5-km MCF, yielding a promising solution for DSP-free coherent co-packaged optics.
A novel reduced-complexity scheme of guard interval based on cyclic extension for NFDM system with continuous spectrum is introduced, increasing the transmission reach by 300 km 16QAM signal and 100 32QAM.
To comprehensively assess optical fiber communication system conditions, it is essential to implement joint estimation of the following four critical impairments: nonlinear signal-to-noise ratio (SNRNL), (OSNR), chromatic dispersion (CD) and differential group delay (DGD). However, current studies only achieve identifying a limited number impairments within narrow range, due limitations in network capabilities lack unified representation impairments. address these challenges, we adopt...
An innovative approach has been proposed for adaptive bias control in optical IQ modulators. In contrast to traditional approaches that utilize sine dither, this method employs a linear frequency modulated (LFM) signal as the associated with fractional Fourier Transform (FrFT) extract point drift. The LFM signal, after undergoing FrFT, transforms into compressed (CS) energy concentration domain. Utilizing monitoring, demonstrates robust even presence of substantial interferences,...
We demonstrate a novel inter-core crosstalk sense-and-compensate method with the CAZAC sequence as frame header in crosstalk-limited IMDD SDM system, achieving 2.5 dB sensitivity improvement and ensuring quality of transmission.
A DSP-free baud-rate sampled self-homodyne coherent receiver is achieved by utilizing all-optical signal processing including optical clock synchronization, adaptive polarization control, and carrier injection locking. The error-free dual-polarization 64-GBaud QPSK reception has been verified in back-to-back (BER <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$< 1\mathrm{e}-6)$</tex> 1 km 5\mathrm{e}$</tex> - 6) scenarios.
We propose and demonstrate a method for controlling bias point of optical IQ modulator using LFM pilot FrFT. This approach enables highly precise control even in the presence RF noise, while also maintaining stable signal transmission performance under laboratory test.
By awakening the sensing capability of fractional Fourier transform (FrFT) synchronization pilot in digital subcarrier multiplexing (DSCM) coherent transmission systems, we realize 100-Gb/s 16QAM with a distributed acoustic (DAS) sensitivity 70 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{p}\varepsilon/\sqrt{\text{Hz}}$</tex> at spatial resolution 5 m.
We proposed a modified spectral gain model for the Erbium-doped fiber amplifier based on singular value decomposition. More than 93% of predicted loading channel errors are less 0.2 dB under partial loadings.
Abstract: We propose a phase-sensitive reflectometry using continuous probe generated by fractional Fourier transform (FrFT) of direct current signal. High-performance pulse compression is achieved single FrFT operation while significantly reducing computational complexity.