An 8×10 GHz receiver optical sub-assembly （ROSA） consisting of an 8-channel arrayed waveguide grating （AWG） and an 8-channel PIN photodetector （PD） array is designed and fabricated based on silica hybrid in...An 8×10 GHz receiver optical sub-assembly （ROSA） consisting of an 8-channel arrayed waveguide grating （AWG） and an 8-channel PIN photodetector （PD） array is designed and fabricated based on silica hybrid integration technology. Multimode output waveguides in the silica AWG with 2% refractive index difference are used to obtain fiat-top spectra. The output waveguide facet is polished to 45° bevel to change the light propagation direction into the mesa-type PIN PD, which simplifies the packaging process. The experimentM results show that the single channel I dB bandwidth of AWG ranges from 2.12nm to 3.06nm, the ROSA responsivity ranges from 0.097 A/W to 0.158A/W, and the 3dB bandwidth is up to 11 GHz. It is promising to be applied in the eight-lane WDM transmission system in data center interconnection.展开更多
Propelled by the rise of artificial intelligence,cloud services,and data center applications,next-generation,low-power,local-oscillator-less,digital signal processing(DSP)-free,and short-reach coherent optical communi...Propelled by the rise of artificial intelligence,cloud services,and data center applications,next-generation,low-power,local-oscillator-less,digital signal processing(DSP)-free,and short-reach coherent optical communication has evolved into an increasingly prominent area of research in recent years.Here,we demonstrate DSP-free coherent optical transmission by analog signal processing in frequency synchronous optical network(FSON)architecture,which supports polarization multiplexing and higher-order modulation formats.The FSON architecture that allows the numerous laser sources of optical transceivers within a data center can be quasi-synchronized by means of a tree-distributed homology architecture.In conjunction with our proposed pilot-tone assisted Costas loop for an analog coherent receiver,we achieve a record dual-polarization 224-Gb/s 16-QAM 5-km mismatch transmission with reset-free carrier phase recovery in the optical domain.Our proposed DSP-free analog coherent detection system based on the FSON makes it a promising solution for next-generation,low-power,and high-capacity coherent data center interconnects.展开更多
Artificial intelligence-driven(AI-driven)data centers,which require high-performance,scalable,energy-efficient,and secure infrastructure,have led to unprecedented data traffic demands.These demands involve low-latency...Artificial intelligence-driven(AI-driven)data centers,which require high-performance,scalable,energy-efficient,and secure infrastructure,have led to unprecedented data traffic demands.These demands involve low-latency,high-bandwidth connections,low power consumption,and data confidentiality.However,conventional optical interconnect solutions,such as intensity-modulated direct detection and traditional coherent systems,cannot address these requirements simultaneously.In particular,conventional encryption protocols that rely on complex algorithms are increasingly vulnerable to the rapid advancement of quantum computing.We propose and demonstrate a quantum-secured data transmission architecture that involves minimal digital signal processing(DSP)consumption and meets all the stringent requirements for AI-driven data center optical interconnect(AI-DCI)scenarios.By integrating a self-homodyne coherent(SHC)system and quantum key distribution(QKD)through the multicore-fiber-based space division multiplexing(SDM)technology,our scheme enables secure,high-capacity,and energy-efficient data transmission while ensuring resilience against quantum computing threats.In our demonstration,we achieved an expandable transmission capacity of 2 Tbit per second(Tb/s)with a quantum secret key rate(SKR)of 229.2 kb∕s and further validated real-time encrypted transmission using AES-256 encryption with QKD-generated keys.Our work paves the way for constructing secure,scalable,and cost-efficient data transmission frameworks,enabling the next generation of intelligent,leak-proof optical interconnects for data centers.展开更多
With the promotion of“dual carbon”strategy,data center(DC)access to high-penetration renewable energy sources(RESs)has become a trend in the industry.However,the uncertainty of RES poses challenges to the safe and s...With the promotion of“dual carbon”strategy,data center(DC)access to high-penetration renewable energy sources(RESs)has become a trend in the industry.However,the uncertainty of RES poses challenges to the safe and stable operation of DCs and power grids.In this paper,a multi-timescale optimal scheduling model is established for interconnected data centers(IDCs)based on model predictive control(MPC),including day-ahead optimization,intraday rolling optimization,and intraday real-time correction.The day-ahead optimization stage aims at the lowest operating cost,the rolling optimization stage aims at the lowest intraday economic cost,and the real-time correction aims at the lowest power fluctuation,eliminating the impact of prediction errors through coordinated multi-timescale optimization.The simulation results show that the economic loss is reduced by 19.6%,and the power fluctuation is decreased by 15.23%.展开更多
基金Supported by the National High Technology Research and Development Program of China under Grant No 2015AA016902the National Natural Science Foundation of China under Grant Nos 61435013 and 61405188the K.C.Wong Education Foundation
文摘An 8×10 GHz receiver optical sub-assembly （ROSA） consisting of an 8-channel arrayed waveguide grating （AWG） and an 8-channel PIN photodetector （PD） array is designed and fabricated based on silica hybrid integration technology. Multimode output waveguides in the silica AWG with 2% refractive index difference are used to obtain fiat-top spectra. The output waveguide facet is polished to 45° bevel to change the light propagation direction into the mesa-type PIN PD, which simplifies the packaging process. The experimentM results show that the single channel I dB bandwidth of AWG ranges from 2.12nm to 3.06nm, the ROSA responsivity ranges from 0.097 A/W to 0.158A/W, and the 3dB bandwidth is up to 11 GHz. It is promising to be applied in the eight-lane WDM transmission system in data center interconnection.
基金supported by the National Natural Science Foundation of China(Grant Nos.62405250 and 62471404)the China Postdoctoral Science Foundation(Grant No.2024M762955)+1 种基金the Key Project of Westlake Institute for Optoelectronics(Grant No.2023GD003)the Optical Com-munication and Sensing Laboratory,School of Engineering,Westlake University.
文摘Propelled by the rise of artificial intelligence,cloud services,and data center applications,next-generation,low-power,local-oscillator-less,digital signal processing(DSP)-free,and short-reach coherent optical communication has evolved into an increasingly prominent area of research in recent years.Here,we demonstrate DSP-free coherent optical transmission by analog signal processing in frequency synchronous optical network(FSON)architecture,which supports polarization multiplexing and higher-order modulation formats.The FSON architecture that allows the numerous laser sources of optical transceivers within a data center can be quasi-synchronized by means of a tree-distributed homology architecture.In conjunction with our proposed pilot-tone assisted Costas loop for an analog coherent receiver,we achieve a record dual-polarization 224-Gb/s 16-QAM 5-km mismatch transmission with reset-free carrier phase recovery in the optical domain.Our proposed DSP-free analog coherent detection system based on the FSON makes it a promising solution for next-generation,low-power,and high-capacity coherent data center interconnects.
基金supported by the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0300701)the Hubei Optical Fundamental Research Center,the National Natural Science Foundation of China(Grant Nos.62205114 and 62225110)the Major Program(JD)of Hubei Province(Grant No.2023BAA001-1).
文摘Artificial intelligence-driven(AI-driven)data centers,which require high-performance,scalable,energy-efficient,and secure infrastructure,have led to unprecedented data traffic demands.These demands involve low-latency,high-bandwidth connections,low power consumption,and data confidentiality.However,conventional optical interconnect solutions,such as intensity-modulated direct detection and traditional coherent systems,cannot address these requirements simultaneously.In particular,conventional encryption protocols that rely on complex algorithms are increasingly vulnerable to the rapid advancement of quantum computing.We propose and demonstrate a quantum-secured data transmission architecture that involves minimal digital signal processing(DSP)consumption and meets all the stringent requirements for AI-driven data center optical interconnect(AI-DCI)scenarios.By integrating a self-homodyne coherent(SHC)system and quantum key distribution(QKD)through the multicore-fiber-based space division multiplexing(SDM)technology,our scheme enables secure,high-capacity,and energy-efficient data transmission while ensuring resilience against quantum computing threats.In our demonstration,we achieved an expandable transmission capacity of 2 Tbit per second(Tb/s)with a quantum secret key rate(SKR)of 229.2 kb∕s and further validated real-time encrypted transmission using AES-256 encryption with QKD-generated keys.Our work paves the way for constructing secure,scalable,and cost-efficient data transmission frameworks,enabling the next generation of intelligent,leak-proof optical interconnects for data centers.
文摘With the promotion of“dual carbon”strategy,data center(DC)access to high-penetration renewable energy sources(RESs)has become a trend in the industry.However,the uncertainty of RES poses challenges to the safe and stable operation of DCs and power grids.In this paper,a multi-timescale optimal scheduling model is established for interconnected data centers(IDCs)based on model predictive control(MPC),including day-ahead optimization,intraday rolling optimization,and intraday real-time correction.The day-ahead optimization stage aims at the lowest operating cost,the rolling optimization stage aims at the lowest intraday economic cost,and the real-time correction aims at the lowest power fluctuation,eliminating the impact of prediction errors through coordinated multi-timescale optimization.The simulation results show that the economic loss is reduced by 19.6%,and the power fluctuation is decreased by 15.23%.
