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Multi-carrier Tb/s silicon photonic coherent receiver

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Science China(Information Sciences) 2024年第1期67卷 284-291页

作者： Zhen WANG Xingfeng LI Jingchi LI Jian SHEN Yong ZHANG yikai su State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong University

We propose a silicon polarization-diversity coherent receiver for wavelength-multiplexing transmission without using the large-footprint arrayed waveguide grating(AWG).We have integrated our proposed coherent receiver on the silicon-on-insulator(SOI) platform for high-capacity *** the proposed coherent receiver,high-frequency photocurrent signals from other wavelengths are suppressed by electrical low-pass ***,the signal-signal beat interference(SSBI) generated from each wavelength is eliminated by the balanced *** two features lend to the proposed coherent receiver being free of the mm-scale *** have demonstrated our proposed coherent receiver to detect a 1.12-Tb/s wavelength-division-multiplexed and polarization-division-multiplexed 16-ary quadrature amplitude modulation(PDM-16-QAM) *** compact footprint of the silicon chip promises small-form-factor receivers for future ultra-high-capacity coherent communication systems that require a high integration level and low fabrication cost.

关键词： silicon photonics optical receivers coherent communication wavelength-division-multiplexing(WDM) polarization-division-multiplexing(PDM)

All-optical silicon microring spiking neuron

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Photonics Research 2022年第4期10卷 939-946页

作者： Jinlong Xiang Yujia Zhang Yaotian Zhao Xuhan Guo yikai su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

With the rapid development of artificial intelligence and machine learning, brain-inspired neuromorphic photonics has emerged as an extremely attractive computing paradigm, promising orders-of-magnitude higher computing speed and energy efficiency compared to its electronic counterparts. Tremendous efforts have been devoted to photonic hardware implementations of mimicking the nonlinear neuron-like spiking response and the linear synapse-like weighting functionality. Here, we systematically characterize the spiking dynamics of a passive silicon microring neuron. The research of self-pulsation and excitability reveals that the silicon microring can function as an all-optical class Ⅱ resonate-and-fire neuron. The typical refractory period has been successfully suppressed by configuring the pump power above the perturbation power, hence allowing the microring neuron to operate with a speed up to roughly sub-gigahertz. Additionally, temporal integration and controllable inhibition regimes are experimentally demonstrated for the first time, to the best of our knowledge. Our experimental verification is obtained with a commercial CMOS platform, hence offering great potential for large-scale neuromorphic photonics integration.

关键词： microring optical attractive

Ultracompact topological photonic switch based on valley-vortex-enhanced high-efficiency phases shift

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Light(Science & Applications) 2022年第11期11卷 2646-2654页

作者： Hongwei Wang Gujing Tang Yu He Zhen Wang Xingfeng Li Lu sun Yong Zhang Luqi Yuan Jianwen Dong yikai su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong University200240 ShanghaiChina State Key Laboratory of Optoelectronic Materials and Technologies&School of Physics Sun Yat-sen University510275 GuangzhouChina School of Physics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina

Topologically protected edge states based on valley photonic crystals(VPCs)have been widely studied,from theoretical verifcation to technical ***,research on integrated tuneable topological devices is still ***,we study the phase-shifting theory of topological edge modes based on a VPC *** from the phase vortex formed by the VPC structure,the optical path of the topological edge mode in the propagation direction is approximately two-fold that of the conventional optical mode in a strip *** experiments,we show a 1.57-fold improvement inπ-phase tuning *** leveraging the highefficiency phase-shifting properties and the sharp-turn features of the topological waveguide,we demonstrate an ultracompact 1×2 thermo-optic topological switch(TOTS)operating at telecommunication wavelengths.A switching power of 18.2 mW is needed with an ultracompact device footprint of 25.66×28.3μm in the wavelength range of 1530-1582 *** the best of our knowledge,this topological photonic switch is the smallest switch of any dielectric or semiconductor 1×2/2×2 broadband optical switches,including thermo-optic and electro-optic *** addition,a high-speed transmission experiment employing the proposed TOTS is carried out to demonstrate the robust transmission of high-speed *** work reveals the phase shifting mechanism of valley edge modes,which may enable diverse topological functional devices in many fields,such as optical communications,nanophotonics,and quantum information processing.

关键词： waveguide tuning valley

Recent progress in graphene-based optical modulators on silicon photonics platform

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National Science Open 2022年第3期1卷 109-128页

作者： Ciyuan Qiu Huiying Zeng yikai su State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Graphene is a 2D material which has attracted tremendous interest from academia and industry,due to its attractive electrical and optical *** integrating graphene onto silicon photonics platform,various high-performance electrooptic and thermo-optic modulators have been *** this paper,such graphene-based optical modulators are *** concept and principle of optical modulations are firstly analyzed and then an overview of the developing trends of optical modulators is ***,the performances of graphene-based optical modulators,including power consumptions and speeds of electro-optic modulators as well as tuning efficiencies of thermo-optic modulators,are then evaluated and discussed in *** these optical modulators would play important roles in a wide range of applications including telecom,interconnects,computing,quantum information processing,and beam steering.

关键词： optical modulator graphene integrated high-speed

On-chip silicon photonic 2 × 2 mode-and polarization-selective switch with low inter-modal crosstalk

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Photonics Research 2017年第5期5卷 512-517页

作者： YONG ZHANG YU HE QINGMING ZHU CIYUAN QIU yikai su State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong University

Mode-and polarization-division multiplexing offer new dimensions to increase the transmission capacity of optical communications. Selective switches are key components in reconfigurable optical network nodes. An on-chip silicon 2 × 2 mode-and polarization-selective switch that can route four data channels on two modes and two polarizations simultaneously is proposed and experimentally demonstrated for the first time, to the best of our knowledge. The overall insertion losses are lower than 8.6 d B. To reduce the inter-modal crosstalk, polarization beam splitters are added to filter the undesired polarizations or modes. The measured inter-modal andintra-modal crosstalk values are below-23.2 and-22.8 d B for all the channels, respectively.

关键词： mode-and polarization-selective switch with low inter-modal crosstalk On-chip silicon photonic 2 MZI

Silicon-integrated high-speed mode and polarization switch-andselector

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Journal of Semiconductors 2022年第2期43卷 54-58页

作者： Yihang Dong Yong Zhang Jian Shen Zihan Xu Xihua Zou yikai su State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiao Tong UniversityChengdu 611756China

On-chip optical communications are growingly aiming at multimode operation together with mode-division multiplex-ing to further increase the transmission *** switches,which are capable of optical signals switching at the nodes,play a key role in optical *** demonstrate a 2×2 electro-optic Mach-Zehnder interferometer-based mode-and polar-ization-selective switch fabricated by standard complementary metal-oxide-semiconductor *** electro optic tuner based on a PN-doped junction in one of the Mach-Zehnder interferometer arms enables dynamic switching in 11 *** all the channels,the overall insertion losses and inter-modal crosstalk values are below 9.03 and-15.86 dB at 1550 nm,respect-ively.

关键词： mode and polarization switch-and-selector silicon photonics high speed

On-chip metamaterial-enabled high-order mode-division multiplexing

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Advanced Photonics 2023年第5期5卷 106-113页

作者： Yu He Xingfeng Li Yong Zhang Shaohua An Hongwei Wang Zhen Wang Haoshuo Chen Yetian Huang Hanzi Huang Nicolas KFontaine Roland Ryf Yuhan Du Lu sun Xingchen Ji Xuhan Guo Yingxiong Song Qianwu Zhang yikai su Shanghai Jiao Tong University Department of Electronic EngineeringState Key Laboratory of Advanced Optical Communication Systems and NetworksShanghaiChina Nokia Bell Labs Murray HillNew JerseyUnited States Shanghai University Key Laboratory of Specialty Fiber Optics and Optical Access NetworksJoint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghaiChina Shanghai Jiao Tong University School of Electronic Information and Electrical EngineeringJohn Hopcroft Center for Computer ScienceShanghaiChina

Mode-division multiplexing(MDM)technology enables high-bandwidth data transmission using orthogonal waveguide modes to construct parallel data ***,few demonstrations have been realized for generating and supporting high-order modes,mainly due to the intrinsic large material groupvelocity dispersion(GVD),which make it challenging to selectively couple different-order spatial *** show the feasibility of on-chip GVD engineering by introducing a gradient-index metamaterial structure,which enables a robust and fully scalable MDM *** demonstrate a record-high-order MDM device that supports TE_(0)–TE_(15)modes simultaneously.40-GBaud 16-ary quadrature amplitude modulation signals encoded on 16 mode channels contribute to a 2.162 Tbit∕s net data rate,which is the highest data rate ever reported for an on-chip single-wavelength *** method can effectively expand the number of channels provided by MDM technology and promote the emerging research fields with great demand for parallelism,such as high-capacity optical interconnects,high-dimensional quantum communications,and large-scale neural networks.

关键词： integrated photonics metamaterial mode-division multiplexing subwavelength grating

Metamaterial-enabled arbitrary on-chip spatial mode manipulation

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Light(Science & Applications) 2022年第7期11卷 1482-1492页

作者： Jinlong Xiang Zhiyuan Tao Xingfeng Li Yaotian Zhao Yu He Xuhan Guo yikai su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

On-chip spatial mode operation,represented as mode-division multiplexing(MDM),can support high-capacity data communications and promise superior performance in various systems and numerous applications from optical sensing to nonlinear and quantum ***,the scalability of state-of-the-art mode manipulation techniques is significantly hindered not only by the particular mode-order-oriented design strategy but also by the inherent limitations of possibly achievable mode ***,metamaterials capable of providing subwavelength-scale control of optical wavefronts have emerged as an attractive alternative to manipulate guided modes with compact footprints and broadband ***,we propose a universal yet efficient design framework based on the topological metamaterial building block(BB),enabling the excitation of arbitrary high-order spatial modes in silicon *** simply programming the layout of multiple fully etched dielectric metamaterial perturbations with predefined mathematical formulas,arbitrary high-order mode conversion and mode exchange can be simultaneously realized with uniform and competitive *** extraordinary scalability of the metamaterial BB frame is experimentally benchmarked by a record high-order mode operator up to the *** a proof of conceptual application,an 8-mode MDM data transmission of 28-GBaud 16-QAM optical signals is also verified with an aggregate data rate of 813 Gb/s(7%FEC).This user-friendly metamaterial BB concept marks a quintessential breakthrough for comprehensive manipulation of spatial light on-chip by breaking the long-standing shackles on the scalability,which may open up fascinating opportunities for complex photonic functionalities previously inaccessible.

关键词： arbitrary proof breakthrough

Ultracompact bandwidth-tunable filter based on subwavelength grating-assisted contra-directional couplers

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Frontiers of Optoelectronics 2021年第3期14卷 374-380页

作者： Kangnian WANG Yuan WANG Xuhan GUO Yong ZHANG An HE yikai su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

An ultracompact,bandwidth-tunable filter has been demonstrated using a silicon-on-insulator(SOI)*** device is based on cascaded grating-assisted contra-directional couplers(GACDCs).It also involves the use of a subwavelength grating(SWG)*** heating one of the heaters on GACDCs,a bandwidth tunability of~6 nm is *** to the benefit of having a large coupling coefficient between SWG and strip waveguides,the length of the coupling region is only 100 ***,the combination of the curved SWG and the tapered strip waveguides effectively suppresses the *** filter possesses features of simultaneous wavelength tuning with no free spectral range(FSR)limitation.A maximum bandwidth of 10 nm was experimentally measured with a high out-of-band contrast of 25 ***,the minimum bandwidth recorded is 4 nm with an out-of-band contrast of 15 dB.

关键词： silicon-based devices tunable filter subwavelength grating waveguide grating-assisted contra-directional coupler(GACDC)