A5100329890- Optical Network Technologies
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Optical Network Technologies
- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Neural Networks and Reservoir Computing
- Advanced Fiber Optic Sensors
- Optical Coatings and Gratings
- Mechanical and Optical Resonators
- Advanced Wireless Communication Techniques
- Optical Wireless Communication Technologies
- Advanced Data Storage Technologies
- Photonic Crystal and Fiber Optics
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Radio Frequency Integrated Circuit Design
- Advancements in PLL and VCO Technologies
- Photorefractive and Nonlinear Optics
- PAPR reduction in OFDM
- Metamaterials and Metasurfaces Applications
- Power Line Communications and Noise
- Ultra-Wideband Communications Technology
Nokia (United States)
2016-2024
Huawei Technologies (China)
2023-2024
BOE Technology Group (China)
2024
Beijing Jiaotong University
2023
Nokia (Finland)
2022
Shanghai Jiao Tong University
2020-2022
Northwestern University
2008-2021
University of the Basque Country
2021
Providence College
2021
Peking University
2017
Chirality is an important concept that describes the asymmetry property of a system, which usually emerges spontaneously due to mirror symmetry breaking. Such spontaneous chirality manifests predominantly as parity breaking in modern physics, has been studied extensively, for instance, Higgs double-well Bose-Einstein condensates, topological insulators and superconductors. In optical domain, chiral elusive experimentally, especially micro- nano-photonics demands multiple identical...
To cope with the explosive bandwidth demand, significant progress has been made in ITU-T standardization sector to define a higher-speed passive optical network (PON) 50 Gb/s line rate. Recently, G PON become mature gradually, which means it is time discuss beyond PON. For ensuring an acceptable power budget, will potentially use coherent technologies, can simultaneously promote applications of flexible multiple access such as time/frequency-domain (TFDMA). In this paper, we introduce...
In this paper, we review in detail experimental demonstrations of Kramers–Kronig (KK) based direct detection systems with high per-carrier interface rates, spectral efficiencies, and ∼100-km reach. Two realizations KK-based receivers are summarized, including single-polarization dual-polarization versions. Critical aspects the KK receiver such as carrier-to-signal power ratio bandwidth limitations discussed. We show 220-Gb/s single-diode 4 × 240-Gb/s dual polarization (dual-diode) a WDM...
Data center interconnect has stimulated the research on short-reach communications with data rate beyond 100G per wavelength and transmission distance of hundreds kilometers. Aiming at high-speed communications, we recently proposed Stokes vector direct detection (SV-DD) that realizes a linear complex optical channel similar to coherent detection. In SV-DD, transmitter places signal carrier onto orthogonal polarizations, while receiver achieves polarization insensitive 3-D in space digital...
The various topologies, traffic patterns and cost targets of optical networks have prevented the deployment end-to-end solutions across multi-domains, optimization network as a whole. consequent limitations in flexibility, scalability, adaptability will become increasingly important with new applications, such 5G/6G. Coherent transceivers based on digital subcarrier multiplexing (DSCM) are proposed to address these current constraints. In particular, DSCM allows (i) design high-capacity...
The 4-ary pulse amplitude modulation (PAM-4) has been widely deployed to both electrical and optical interfaces in datacenter applications. Based on 100-GBd PAM-4, the 200G per lane interface is being actively developed industrial interoperability groups standard bodies. Going beyond 200G, it questionable if PAM-4 could support an even faster with higher baud-rate, considering bandwidth growth for electronics components started lagging ever-increasing capacity demand. Under limited...
It is foreseeable that the 100 Gb/s/ <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\lambda$</tex-math></inline-formula> and beyond passive optical network (PON) will be required in future access networks to meet explosive growth of data traffic. The coherent systems could a promising solution for G PON. Coherent PON using digital subcarrier multiplexing (DSCM) can provide flexible bandwidth allocation...
Abstract The Covid-19 pandemic showed forcefully the fundamental importance broadband data communication and internet has in our society. Optical communications forms undisputable backbone of this critical infrastructure, it is supported by an interdisciplinary research community striving to improve develop further. Since first ‘Roadmap optical communications’ was published 2016, field seen significant progress all areas, time ripe for update status. area become increasingly diverse,...
While transistor performance and energy efficiency have dramatically improved in recent years, electrical interconnect improvements has failed to keep pace. Recent advances nanophotonic fabrication made on-chip optics an attractive alternative. However, system integration challenges remain. In particular, the parameters of structures are sensitive fabrication-induced process variation run-time spatial thermal across die. This work addresses reliability that arise from this sensitivity...
We report the transmission of probabilistically shaped (PS) 64-ary quadrature amplitude modulation (QAM) at 7.46 b/s/Hz over a 5523-km in-service trans-Atlantic fiber-optic cable that consists 65-89-km spans Erbium-doped fiber amplifier only amplified fiber. Using looped-back system configuration, we achieve 5.68 trans-Pacific-equivalent distance 11 046 km. Net spectral efficiencies are increased by 18% and 80% using PS, 5523 km km, respectively, compared to uniform square QAM. Throughout...
Recently, there is increasing interest in utilizing Stokes vector receiver, which a direct-detection technique with the capability to digitally track polarization changes fibers and decode information multiple dimensions. Here, we report monolithically integrated silicon photonic consists of one beam splitter, two rotators, 90-degree optical hybrid, six germanium photodetectors. Paired in-phase/quadrature modulator incorporating power-tunable carrier orthogonal polarization, transmission at...
We present two schemes extending the Kramers-Kronig-receiver to polarization multiplexed transmission. One of relies on Stokes receiver and allows for complex-valued transmission without using a local oscillator, active control at receiver. It uses three photodiodes requires analog-to-digital converters (ADCs). The other scheme its implementation is suitable in all cases where transmitter operate same wavelength, so that oscillator signal can be extracted from transmit laser. only ADCs, does...
We propose the Stokes vector direct detection (SV-DD) scheme which simultaneously achieves receiver phase diversity and cancellation of photodetection nonlinearity. An 80 Gb/s single-polarization modulated SV-DD signal is successfully received after 160 km SSMF transmission with 11.64 bit/s/Hz electrical spectrum efficiency.
We demonstrate a 4,294,967,296-ary quadrature amplitude modulation (QAM) based Y-00 quantum stream cipher system carrying 160-Gb/s 16-QAM signal transmitted over 320-km SSMF. The ultra-dense QAM template is realized by an integrated two-segment silicon photonics I/Q modulator.
In optical communications, sphere shaping is used to limit the energy of lightwaves within a certain value over period. This minimizes required contain information, allowing rate information transmission approach theoretical if medium linear. However, when shaped are transmitted through fiber, Kerr nonlinearity manifests itself as nonlinear interference in peculiar way, potentially lowering communications capacity. this article, we show that impact on varies with chromatic dispersion, block...
200-Gb/s per lane intensity-modulation (IM) direct-detection (DD) optics are being commercialized to support 800G and 1.6T applications inside datacenters. Though IM-DD remains its cost power consumption advantages over Coherent at for short-reach interconnect below 10 km, roadmap is not clear towards the next capacity doubling, considering it becomes more challenging scale components bandwidth linearly with demand. This makes both advanced modulation formats digital signal processing (DSP)...
With ideal nonlinearity compensation using digital back propagation (DBP), the transmission performance of an optical fiber channel has been considered to be limited by nondeterministic nonlinear signal-ASE interaction. In this paper, we conduct theoretical and numerical study on DBP in presence polarization-mode dispersion (PMD). Analytical expressions with are derived substantiated simulations for polarization-division-multiplexed systems under influence PMD effects. We find that...
We demonstrate transmission of a 10-subcarrier superchannel with record-high intra-channel spectral efficiency 17.3 bit/s/Hz over 50-km backward Raman amplified Corning® Vascade® EX2000 fiber using 3-GBd probabilistically shaped PDM 4096-QAM.
We propose the Stokes vector direct detection (SV-DD) algorithm to achieve photo-detection nonlinearity cancellation and phase diversity. A 160-Gb/s single-polarization modulated SV-DD signal is successfully received after 160-km SSMF transmission with 7.76-bit/s/Hz electrical spectrum efficiency.
We demonstrate 102-GHz DBI-DAC and 100-GHz I/Q modulator enabled PDM 200-GBaud probabilistically shaped 64-QAM signal carrying up to 7.92 information bits/symbol/2-polarization. A net data rate of 1.58 Tb/s is achieved on a single wavelength.
Since its early commercial deployment in the late 1980s, optical fiber has evolved to become predominant carrier of globe's communications. Yet, after accommodating world's exponentially growing appetite for transmitted data more than three decades, ability continue doing so is being challenged by fundamental factors. In this article, we review these factors and examine their consequences terms information capacity. particular, difficulties that are imposed nonlinear nature fiber-optic...
High‐speed modulators with low driving voltage, loss, and compact size are essential for future optical communication systems. Thin‐film lithium niobate have met each of these criteria separately, but simultaneous achievement all them has been challenging on this platform. Low voltage electro‐optic necessitate either a narrow gap between the electrodes or an elongated Mach–Zehnder arms, both which adversely affect microwave hence bandwidth. Herein, trade‐off is alleviated by placing...
According to the World Meteorological Organization &#8220;Guide Instruments and Methods of Observation&#8221;, 120W/m2 is sunshine threshold duration observation, which very critical accuracy measurement instruments. To address issues poor repeatability low reproducibility outdoor calibration photovoltaic-based recorder (PSR) due environmental influences, we developed a dual-source integrating sphere system using solar simulator an with xenon lamp based on structure principle PSR,...