Guansheng Shen

Institute of Navigation

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Huiping Tian

Beijing University of Posts and Telecommunications

Yuefeng Ji

Beijing University of Posts and Telecommunications

Siming Liu

Chongqing Normal University

Weiheng Zhang

Harbin Institute of Technology

Daquan Yang

Beijing University of Posts and Telecommunications

Jian Zhou

Zhejiang University

Weijia Liu

National Renewable Energy Laboratory

Yi Yang

Peking University

Yanbin Kou

Beijing University of Posts and Telecommunications

Hongzhan Liu

University of Science and Technology of China

Cooperative Institutions

Institute of Navigation

187

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Beijing University of Posts and Telecommunications

Chinese Academy of Medical Sciences & Peking Union Medical College

Peking University

Zhejiang University

Tsinghua University

Sun Yat-sen University

Sichuan University

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Light-trapping in perovskite solar cells

AIP Advances (2016)

Qingguo Du Guansheng Shen Sajeev John

We numerically demonstrate enhanced light harvesting efficiency in both CH3NH3PbI3 and CH(NH2)2PbI3-based perovskite solar cells using inverted vertical-cone photonic-crystal nanostructures. For CH3NH3PbI3 perovskite solar cells, the maximum achievable photocurrent density (MAPD) reaches 25.1 mA/cm2, corresponding to 92% of the total available photocurrent in the absorption range of 300 nm to 800 nm. Our cell shows 6% absorption enhancement compared to the Lambertian limit (23.7 mA/cm2) and has a projected power conversion efficiency of 12.9%. Excellent solar absorption is numerically demonstrated over a broad angular range from 0 to 60 degree for both S- and P- polarizations. For the corresponding CH(NH2)2PbI3 based perovskite solar cell, with absorption range of 300 nm to 850 nm, we find a MAPD of 29.1 mA/cm2, corresponding to 95.4% of the total available photocurrent. The projected power conversion efficiency of the CH(NH2)2PbI3 based photonic crystal solar cell is 23.4%, well above the current world record efficiency of 20.1%.

Photocurrent

Perovskite solar cell

10.1063/1.4953336

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Citations (53)

An Adaptive Activated ANN Equalizer Applied in Millimeter-Wave RoF Transmission System

IEEE Photonics Technology Letters (2017)

Siming Liu Xinye Wang Weiheng Zhang Guansheng Shen Huiping Tian

We experimentally demonstrate a 60-GHz radioover-fiber (RoF) system using an adaptive activated artificial neural network nonlinear equalizer (ANN-NLE) to improve the bit error rate (BER) performance. We propose a variable-α activation function ANN-NLE with a faster convergence speed and a stronger equalization ability to solve the nonlinear problems generated from the RoF link. To the best of our knowledge, this letter is the first to apply an adaptive activation function ANN to solve a classification problem and equalize the signals in a 60-GHz RoF system. Using the proposed ANN-NLE, a higher convergence speed and better BER performances can be achieved. Comparisons between our proposed ANN-NLE and nonlinear Volterra equalizer in polynomial structure are reported. Using the proposed ANN-NLE, the system successfully transmits a 5-Gbps BPSK signal through a 10-km fiber and 1.2-m wireless link under a forward error correction limit of 10 ^-3 with much higher power sensitivity than the Volterra equalizer.

Adaptive equalizer

Activation function

Volterra series

10.1109/lpt.2017.2753174

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Citations (25)

A RoF-PON network simultaneously providing broadband 60-GHz and base-band services

2022 20th International Conference on Optical Communications and Networks (ICOCN) (2015)

Siming Liu Huiping Tian Daquan Yang Guansheng Shen Yuefeng Ji

We experimentally demonstrate a RoF-PON system for both wired and 60-GHz wireless services based on heterodyne effect occurring on the photodiode. The system can simultaneously transmit wired and 60-GHz wireless signal at bit rate 2Gbps at BER under 10 ^-6 . 2-Gbps data is successfully transmitted through 4.3-km fiber and 1.2-m 60-GHz wireless link.

Heterodyne (poetry)

Heterodyne detection

Photodiode

10.1109/icocn.2015.7203631

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Capacity allocation mechanism based on differentiated QoS in 60 GHz radio-over-fiber local access network

Optics Communications (2016)

Yanbin Kou Siming Liu Weiheng Zhang Guansheng Shen Huiping Tian

10.1016/j.optcom.2016.11.043

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Citations (3)

Integration of Photonic Crystal Splitter and Slow Light Waveguide for a Microwave Photonic Filter

IEEE photonics journal (2013)

Guansheng Shen Huiping Tian Daquan Yang Yuefeng Ji

We theoretically investigate an ultracompact integration of a photonic crystal (PC) splitter and a slow-light waveguide for a microwave photonic filter. We realize the filter characteristics with a free spectrum range of 130 GHz and a notch depth of 10 dB, and the whole length is only 24.8 μm with the use of a slow-light PC waveguide as a delay line. The splitter is fabricated with the delay line using a U-shaped waveguide. In addition, the coupling efficiency between slow-light waveguide and U-shaped waveguide has been increased from 10% to 62% with an optimized linear taper structure. The proposed microwave photonic filter can be applied in the 60-GHz Radio-over-Fiber (RoF) system.

Splitter

Waveguide

Free spectral range

Slow Light

Waveguide filter

10.1109/jphot.2013.2272777

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Citations (4)

A 60-GHz RoF System Employing Variable Step Size LMS Equalizer with Fast Convergence Speed

Optical Fiber Communication Conference (2016)

Siming Liu Guansheng Shen Huiping Tian

A 60-GHz RoF system transmitting 5-Gbps BPSK signal employing LMS equalizer is experimentally demonstrated. Results prove that the variable-step-size LMS equalizer can significantly enhance the BER performance of the system with faster convergence speed.

Adaptive equalizer

10.1364/ofc.2016.th2a.18

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Citations (4)

Ultra-high-transmittance and High-extinction-ratio Biosensor Based on Photonic Crystal Slab Using H2-type Resonator

Asia Communications and Photonics Conference 2021 (2013)

Jian Zhou Huiping Tian Hongzhan Liu Yi Yang Guansheng Shen

We demonstrate a novel nanoscale photonic crystal biosensor. The proposed biosensor consists of H2-type resonator center-coupled to photonic crystal slab waveguide. Transmittance over 98% and extinction ratio exceeds 25 dB are observed, respectively.

Extinction ratio

Slab

Extinction (optical mineralogy)

Waveguide

10.1364/acp.2013.af2i.12

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A tnnable electro-optic microwave photonic filter based on photonic crystal for 60GHz radio over fiber system

2022 20th International Conference on Optical Communications and Networks (ICOCN) (2013)

Guansheng Shen Nannan Wu Zheng Guo Yanhong Zhang Jian Zhou

A tunable microwave photonic filter (MPF) employing dynamic modulation based on silicon-on-insulator (SOI) is presented. With low group velocity and low loss photonic crystal structure, the novel MPF with a length about 50 μm is proposed for 60-GHz ROF system. The modulation sensitivities are about 45/V for group index, 22.5GHz/V for free spectral range (FSR), while the device size is only 1.21% as the traditional fiber ring resonator. The extinction ratio of the MPF is about 10 dB, along with the 4.02GHz 3dB bandwidth, and the requirement of received data's signal-to-noise ratio (SNR) can be reduced by 9 dB for the 10 ^-7 bit-error ratio (BER).

Extinction ratio

Carrier-to-noise ratio

Free spectral range

Modulation (music)

Slow Light

10.1109/icocn.2013.6617223

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Citations (1)

Design of ultra compact all-optical XOR, XNOR, NAND and OR gates using photonic crystal multi-mode interference waveguides

Optics & Laser Technology (2013)

Weijia Liu Daquan Yang Guansheng Shen Huiping Tian Yuefeng Ji

XNOR gate

10.1016/j.optlastec.2012.12.030

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Citations (142)

Analysis and Research on the Upgrading of Swarm Intelligence Based on the Development of 5G Industry

2021 3rd International Academic Exchange Conference on Science and Technology Innovation (IAECST) (2021)

Yu‐Qiang Ding Xutong Wang Guansheng Shen Jianwei Zhang Shaokun Li

Based on China continuous promotion and comprehensive construction of 5g industry, this paper analyzes the relationship between the current industrial model and the deep integration of artificial intelligence in the real economy. In the face of more and more complex information technology, enterprises' continuous upgrading of intelligence has brought about an imbalance between supply and demand, which not only requires enterprises to constantly explore and innovate, but also a concrete embodiment of realizing enterprise value. With the promotion and application of 5g technology, from the intelligent collaboration mechanism to the mental level of user groups, the research simulates the biological social behavior mechanism from the perspective of Swarm intelligence, and thinks and analyzes the possible challenges.

Promotion (chess)

Swarm intelligence

10.1109/iaecst54258.2021.9695905

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