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  1. Book ; Online: Advanced DSP Techniques for High-Capacity and Energy-Efficient Optical Fiber Communications

    Yue, Yang / Pan, Zhongqi

    2019  

    Abstract: The rapid proliferation of the Internet has been driving communication networks closer and closer to their limits, while available bandwidth is disappearing due to an ever-increasing network load. Over the past decade, optical fiber communication ... ...

    Abstract The rapid proliferation of the Internet has been driving communication networks closer and closer to their limits, while available bandwidth is disappearing due to an ever-increasing network load. Over the past decade, optical fiber communication technology has increased per fiber data rate from 10 Tb/s to exceeding 10 Pb/s. The major explosion came after the maturity of coherent detection and advanced digital signal processing (DSP). DSP has played a critical role in accommodating channel impairments mitigation, enabling advanced modulation formats for spectral efficiency transmission and realizing flexible bandwidth. This book aims to explore novel, advanced DSP techniques to enable multi-Tb/s/channel optical transmission to address pressing bandwidth and power-efficiency demands. It provides state-of-the-art advances and future perspectives of DSP as well
    Keywords Technology (General) ; Engineering (General). Civil engineering (General)
    Size 1 electronic resource (150 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Document type Book ; Online
    Note eng ; Open Access
    HBZ-ID HT020394890
    ISBN 9783039217922 ; 9783039217939 ; 3039217925 ; 3039217933
    DOI 10.3390/books978-3-03921-793-9
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Book ; Online: Optical Communications and Networking: Prospects in Industrial Applications

    Yue, Yang / Huang, Hao / Pan, Zhongqi / Wang, Qiang / Bao, Changjing

    2020  

    Abstract: In the past few decades, the optical communication industry has explored multiple degrees of freedom of the photon, such as time, wavelength, amplitude, phase, polarization, and space, to significantly reduce the cost/bit of data transmission by ... ...

    Abstract In the past few decades, the optical communication industry has explored multiple degrees of freedom of the photon, such as time, wavelength, amplitude, phase, polarization, and space, to significantly reduce the cost/bit of data transmission by increasing the capacity per fiber through multiplexing technology and by reducing the size and power through electronic and photonic integration. This book aims to explore the latest advancements in this industry, including the technologies in devices, systems, and network levels with applications from short-reach chip-to-chip interconnections to long-haul backbone communications at the trans-oceanic distance
    Keywords Technology (General) ; Engineering (General). Civil engineering (General)
    Size 1 electronic resource (132 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Document type Book ; Online
    Note English ; Open Access
    HBZ-ID HT020480916
    ISBN 9783039282586 ; 9783039282593 ; 3039282581 ; 303928259X
    DOI 10.3390/books978-3-03928-259-3
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  3. Book ; Online: Novel Insights into Orbital Angular Momentum Beams: From Fundamentals, Devices to Applications

    Yue, Yang / Huang, Hao / Ren, Yongxiong / Pan, Zhongqi / Willner, Alan E.

    2019  

    Abstract: It is well-known by now that the angular momentum carried by elementary particles can be categorized as spin angular momentum (SAM) and orbital angular momentum (OAM). In the early 1900s, Poynting recognized that a particle, such as a photon, can carry ... ...

    Abstract It is well-known by now that the angular momentum carried by elementary particles can be categorized as spin angular momentum (SAM) and orbital angular momentum (OAM). In the early 1900s, Poynting recognized that a particle, such as a photon, can carry SAM, which has only two possible states, id est, clockwise and anticlockwise circular polarization states. However, only fairly recently, in 1992, Allen and others discovered that photons with helical phase fronts can carry OAM, which has infinite orthogonal states. In the past two decades, the OAM-carrying beam, due to its unique features, has gained increasing interest from many different research communities, including physics, chemistry, and engineering. Its twisted phase front and intensity distribution have enabled a variety of applications, such as micromanipulation, laser beam machining, nonlinear matter interactions, imaging, sensing, quantum cryptography and classical communications. This book aims to explore novel insights of OAM beams. It focuses on state-of-the-art advances in fundamental theories, devices and applications, as well as future perspectives of OAM beams
    Keywords Science (General) ; Physics ; Optics. Light
    Size 1 electronic resource (164 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Document type Book ; Online
    Note eng ; Open Access
    HBZ-ID HT020323966
    ISBN 9783039212231 ; 9783039212248 ; 3039212230 ; 3039212249
    DOI 10.3390/books978-3-03921-224-8
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  4. Article ; Online: Emission of five OAM dispersive waves in dispersion-engineered double-ring core fiber.

    Geng, Wenpu / Fang, Yuxi / Bao, Changjing / Pan, Zhongqi / Yue, Yang

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 8474

    Abstract: Beams carrying orbital angular momentum (OAM) have exhibited significant potential across various fields, such as metrology, image coding, and optical communications. High-performance broadband coherent OAM sources are critical to the operation of ... ...

    Abstract Beams carrying orbital angular momentum (OAM) have exhibited significant potential across various fields, such as metrology, image coding, and optical communications. High-performance broadband coherent OAM sources are critical to the operation of optical systems. The emission of dispersive waves facilitates the efficient transfer of energy to distant spectral domains while preserving the coherence among the generated frequency components. Light sources that maintain consistency over a wide range can increase the efficiency of optical communication systems and improve the measurement accuracy in imaging and metrology. In this work, we propose a germanium-doped double ring-core fiber for five OAM dispersive waves (DWs) generation. The OAM
    Language English
    Publishing date 2024-04-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-57587-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: System impact and calibration method of power imbalances for a dual-polarization in-phase/quadrature optical transmitter.

    Li, Si-Ao / Zhang, Runzhou / Pan, Zhongqi / Yue, Yang

    Optics express

    2022  Volume 30, Issue 20, Page(s) 36727–36744

    Abstract: For the latest 400-Gb/s or upcoming 1-Tb/s single-carrier optical fiber communications systems, dual-polarization quadrature amplitude modulation (DP-QAM) based on in-phase (I) and quadrature (Q) optical transmitter is the only possible solution. In a ... ...

    Abstract For the latest 400-Gb/s or upcoming 1-Tb/s single-carrier optical fiber communications systems, dual-polarization quadrature amplitude modulation (DP-QAM) based on in-phase (I) and quadrature (Q) optical transmitter is the only possible solution. In a coherent DP-IQ transmitter, the power difference between the I and Q branches or orthogonally polarized (X and Y) channels are known as the IQ or XY power imbalance, respectively. Uncompensated IQ and XY power imbalances are always troublesome and can significantly limit the performance in long-haul transmission. In this work, we first experimentally investigate the impact of IQ and XY power imbalances on various QAM formats and baud rates in high-speed transmission. A DP-16-QAM up to 86 GBd is investigated, aiming for beyond 400 Gb/s applications. Then, a convenient pre-calibration method based on optical interference is proposed and experimentally demonstrated to detect and compensate both the IQ and XY power imbalances. This method can use the existing modulator structure and low-speed photodiode in the DP-IQ transmitter to obtain the optical interference power by injecting a specific coded electrical signal. After adjusting the time skew of each channel, the power imbalance between two channels can be calibrated by minimizing the optical interference power. The results fit well with the given theoretical analysis, and the proposed technique can be adopted to the DP-IQ transmitter with different QAM formats.
    Language English
    Publishing date 2022-10-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.469969
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Face Mask Identification Using Spatial and Frequency Features in Depth Image from Time-of-Flight Camera.

    Wang, Xiaoyan / Xu, Tianxu / An, Dong / Sun, Lei / Wang, Qiang / Pan, Zhongqi / Yue, Yang

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 3

    Abstract: Face masks can effectively prevent the spread of viruses. It is necessary to determine the wearing condition of masks in various locations, such as traffic stations, hospitals, and other places with a risk of infection. Therefore, achieving fast and ... ...

    Abstract Face masks can effectively prevent the spread of viruses. It is necessary to determine the wearing condition of masks in various locations, such as traffic stations, hospitals, and other places with a risk of infection. Therefore, achieving fast and accurate identification in different application scenarios is an urgent problem to be solved. Contactless mask recognition can avoid the waste of human resources and the risk of exposure. We propose a novel method for face mask recognition, which is demonstrated using the spatial and frequency features from the 3D information. A ToF camera with a simple system and robust data are used to capture the depth images. The facial contour of the depth image is extracted accurately by the designed method, which can reduce the dimension of the depth data to improve the recognition speed. Additionally, the classification process is further divided into two parts. The wearing condition of the mask is first identified by features extracted from the facial contour. The types of masks are then classified by new features extracted from the spatial and frequency curves. With appropriate thresholds and a voting method, the total recall accuracy of the proposed algorithm can achieve 96.21%. Especially, the recall accuracy for images without mask can reach 99.21%.
    MeSH term(s) Humans ; Masks ; SARS-CoV-2 ; Form Perception ; Algorithms ; Recognition, Psychology
    Language English
    Publishing date 2023-02-01
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23031596
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Book: Conceptual gaps in China-EU relations

    Pan, Zhongqi

    global governance, human rights and strategic partnerships

    2012  

    Author's details ed. by Zhongqi Pan
    Keywords International cooperation ; China ; European Union countries
    Language English
    Size XVII, 246 S., graph. Darst, 23 cm
    Publisher Palgrave Macmillan
    Publishing place Basingstoke u. a.
    Document type Book
    ISBN 1137027436 ; 9781137027436
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  8. Article ; Online: The complete mitochondrial genome of

    Chen, Keke / Si, Chengcai / Pan, Zhongqi / Hao, Jiasheng

    Mitochondrial DNA. Part B, Resources

    2020  Volume 5, Issue 1, Page(s) 639–641

    Abstract: We describe the mitogenome sequence of alpine ... ...

    Abstract We describe the mitogenome sequence of alpine butterfly
    Language English
    Publishing date 2020-01-16
    Publishing country England
    Document type Journal Article
    ISSN 2380-2359
    ISSN (online) 2380-2359
    DOI 10.1080/23802359.2019.1711224
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Parabolic-Index Ring-Core Fiber Supporting High-Purity Orbital Angular Momentum Modes.

    Liu, Yuanpeng / Wang, Yingning / Geng, Wenpu / Zhao, Wenqian / Zhang, Hao / Zhang, Weigang / Pan, Zhongqi / Yue, Yang

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 7

    Abstract: We design a graded-index ring-core fiber with a ... ...

    Abstract We design a graded-index ring-core fiber with a GeO
    Language English
    Publishing date 2023-03-31
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23073641
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Solid-state Lidar with wide steering angle using counter-propagating beams.

    He, Yuxuan / Wang, Qiang / Han, Xu / Wang, Zhonghan / Geng, Wenpu / Fang, Yuxi / Pan, Zhongqi / Yue, Yang

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 15945

    Abstract: In a solid-state photonics-based Lidar, all essential components can be integrated into a silicon chip. It is simple and effective to use a tunable laser source to implement Lidar's beam steering. However, how to effectively increase the steering angle ... ...

    Abstract In a solid-state photonics-based Lidar, all essential components can be integrated into a silicon chip. It is simple and effective to use a tunable laser source to implement Lidar's beam steering. However, how to effectively increase the steering angle in a small wavelength tuning range is usually a key challenge due to the limited material and waveguide dispersion. In Silicon-on-insulator waveguide, we design a novel solid-state Lidar using two trans-electrical (TE) polarized beams counter-propagating towards each other. Two corresponding output beams from just a single grating coupler (GC) can be seamlessly combined to double the beam steering angle. Furthermore, a low-priced solid-state Lidar is designed for TE polarized beams counter-propagating towards each other by using wavelength division multiplexed laser array.
    Language English
    Publishing date 2023-09-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-34199-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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