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Research Articles
On-chip metamaterial-enabled high-order mode-division multiplexing
Yu He
1
Xingfeng Li
1
Yong Zhang
1
Shaohua An
1
[ ... ]
Yikai Su
1,*
Author Affiliations
Abstract
1
Shanghai Jiao Tong University, Department of Electronic Engineering, State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai, China
2
Nokia Bell Labs, Murray Hill, New Jersey, United States
3
Shanghai University, Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai, China
4
Shanghai Jiao Tong University, School of Electronic Information and Electrical Engineering, John Hopcroft Center for Computer Science, Shanghai, China
Mode-division multiplexing (MDM) technology enables high-bandwidth data transmission using orthogonal waveguide modes to construct parallel data streams. However, few demonstrations have been realized for generating and supporting high-order modes, mainly due to the intrinsic large material group-velocity dispersion (GVD), which make it challenging to selectively couple different-order spatial modes. We show the feasibility of on-chip GVD engineering by introducing a gradient-index metamaterial structure, which enables a robust and fully scalable MDM process. We 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 transmission. Our 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.
integrated photonics
metamaterial
mode-division multiplexing
subwavelength grating
PDF全文
Full Text
Advanced Photonics
2023, 5(5): 056008
Optical Microresonators
Noise canceled graphene-microcavity fiber laser sensor for ultrasensitive gas detection
Yuchen Wang
1†
Yiwei Li
1†
Yicheng Li
1†
Hao Zhang
1
[ ... ]
Baicheng Yao
1,*
Author Affiliations
Abstract
1
Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education), University of Electronic Science and Technology of China, Chengdu 610054, China
2
Guangdong and Hong Kong Joint Research Centre for Optical Fiber Sensors, Shenzhen University, Shenzhen 518060, China
3
State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China
Optical microcavities offer a promising platform for highly efficient light–matter interactions. Recently, the combination of microresonators and 2D materials in the nanoscale has further enriched the optoelectronics of microcavity geometries, spurring broad advances including lasers, nonlinear converters, modulators, and sensors. Here, we report the concept of compact dual-laser cogeneration in a graphene-microcavity fiber, which offers a way to cancel the optical common mode noises. Driven by a single 980 nm pump, orthogonally polarized laser lines are generated in a pair of degeneracy breaking modes. The two laser lines produce a heterodyne beat note at 118.96 MHz, with frequency noise down to
200
Hz
2
/
Hz
at 1 MHz offset, demonstrating a linewidth of 930 Hz in vacuum. This compact device enables on-line and label-free
NH
3
gas detection with high resolution, realizing a detection limit on a single pmol/L level, and a capability to quantitatively trace gas–graphene interactions. Such a combination of graphene optoelectronics and microcavity photonics demonstrates a novel physical paradigm for microlaser control and offers a new scheme for
in situ chemical sensing.
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Photonics Research
2023, 11(8): A1
Quantum Optics
All-optical silicon microring spiking neuron
Download:599次
Jinlong Xiang
Yujia Zhang
Yaotian Zhao
Xuhan Guo
*
Yikai Su
Author Affiliations
Abstract
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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.
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Photonics Research
2022, 10(4): 04000939
RESEARCH ARTICLE
Ultracompact bandwidth-tunable filter based on subwavelength grating-assisted contra-directional couplers
Kangnian WANG
Yuan WANG
Xuhan GUO
*
Yong ZHANG
[ ... ]
Yikai SU
作者单位
摘要
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
silicon-based devices
tunable filter
subwavelength
grating waveguide
grating-assisted contra-directional coupler (GACDC
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Frontiers of Optoelectronics
2021, 14(3): 374–380
Reviews
Recent advances of heterogeneously integrated III–V laser on Si
Xuhan Guo
An He
Yikai Su
Author Affiliations
Abstract
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Due to the indirect bandgap nature, the widely used silicon CMOS is very inefficient at light emitting. The integration of silicon lasers is deemed as the ‘Mount Everest’ for the full take-up of Si photonics. The major challenge has been the materials dissimilarity caused impaired device performance. We present a brief overview of the recent advances of integrated III–V laser on Si. We will then focus on the heterogeneous direct/adhesive bonding enabling methods and associated light coupling structures. A selected review of recent representative novel heterogeneously integrated Si lasers for emerging applications like spectroscopy, sensing, metrology and microwave photonics will be presented, including DFB laser array, ultra-dense comb lasers and nanolasers. Finally, the challenges and opportunities of heterogeneous integration approach are discussed.
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Journal of Semiconductors
2019, 40(10): 101304
Editorial
Preface to the Special Topic on Compound Semiconductor Materials and Devices on Si
Huiyun Liu
1
Yikai Su
2
Chuanbo Li
3
Xuhan Guo
4
Author Affiliations
Abstract
1
University College London, Torrington Place, London, WC1E 7JE, UK
2
Shanghai Jiao Tong University, Shanghai, 200240, China
3
Minzu University of China, Beijing, 100081, China
4
Shanghai Jiao Tong University, Shanghai, 200240, China
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Journal of Semiconductors
2019, 40(10): 100101
Integrated Optics
High-efficiency and broadband four-wave mixing in a silicon-graphene strip waveguide with a windowed silica top layer
Download:836次
Yuxing Yang
Zhenzhen Xu
Xinhong Jiang
Yu He
[ ... ]
Yikai Su
*
Author Affiliations
Abstract
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
We experimentally demonstrate high-efficiency and broadband four-wave mixing in a silicon-graphene strip waveguide. A four-wave mixing conversion efficiency of
38.7
dB
and a 3-dB conversion bandwidth of 35 nm are achieved in the silicon-graphene strip waveguide with an optimized light-graphene interaction length of 60 μm. The interaction length is controlled by a windowed area of silica layer on the silicon waveguide. Numerical simulations and experimental studies are carried out and show a nonlinear parameter
γ
GOS
as large as
10
4
W
1
·
m
1
.
Integrated optics devices
Nonlinear optics, four-wave mixing
Nonlinear optical materials
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Photonics Research
2018, 6(10): 10000965
REVIEW ARTICLE
On-chip silicon polarization and mode handling devices
Yong ZHANG
Yu HE
Qingming ZHU
Xinhong JIANG
[ ... ]
Yikai SU
*
作者单位
摘要
State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering,Shanghai Jiao Tong University, Shanghai 200240, China
silicon photonics
polarization beam splitter
polarization splitter and rotator
mode (de)multiplexer
selective switch
PDF全文
Full Text
Frontiers of Optoelectronics
2018, 11(1): 0177
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