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中兴通讯技术（英文版）
中兴通讯技术（英文版）

谢大雄

季刊

1673-5188

magazine@zte.com.cn

0551-5533356

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中兴通讯技术（英文版）/Journal ZTE Communications
查看更多>>ZTE　Communications is a quarterly publication, edited, published and distributed by the Corporate Branding and Communications Department of ZTE Corporation. The magazine focuses on hot telecom topics and front-line telecom technologies, with the sections of “Special Topic”, “Operational Application”, “Research Paper”, “Development Field” and “Lecture Series”. It is a worthwhile magazine for telecom operators and partners of ZTE Corporation alike. The magazine is mainly distributed to telecom operators, science and technology research institutes, relevant government departments, and colleges and universities.
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    Special Topic on Optoelectronic Integrated Chips,Systems,and Key Technologies

    WANG Yongjin
    1-2页
      原文链接:
    • 万方数据

    Monolithically Integrated Photonic Structures for Stable On-Chip Solar Blind Communications

    HE RuiHU QiangRAN JunxueWANG Junxi...
    3-8页
    查看更多>>摘要：A solar-blind multi-quantum well (MQW) structure wafer based on AlGaN materials is epitaxial growth by metal-organic chemical vapor deposition (MOCVD). The monolithically integrated photonic chips including light-emitting diodes (LEDs),waveguides,and photodetec-tors (PDs) are presented. The results of the finite-difference time-domain (FDTD) simulation confirm the strong light constraint of the wave-guide designed with the triangular structure in the optical coupling region. Furthermore,in virtue of predominant ultraviolet transverse mag-netic (TM) modes,the solar blind optical signal is more conducive to lateral transmission along the waveguide inside the integrated chip. The integrated PDs demonstrate sufficient photosensitivity to the optical signal from the integrated LEDs. When the LEDs are operated at 100 mA current,the photo-to-dark current ratio (PDCR) of the integrated PD is about seven orders of magnitude. The responsivity,specific detectivity,and external quantum efficiency of the integrated self-driven PD are 74.89 A/W,4.22×1013 Jones,and 3.38×104％,respectively. The stable on-chip optical information transmission capability of the monolithically integrated photonic chips confirms the great potential for application in large-scale on-chip optical communication in the future.
      原文链接:
    • 万方数据
    • 维普

    Research on High-Precision Stochastic Computing VLSI Structures for Deep Neural Network Accelerators

    WU JingguoZHU JingweiXIONG XiankuiYAO Haidong...
    9-17页
    查看更多>>摘要：Deep neural networks (DNN) are widely used in image recognition,image classification,and other fields. However,as the model size increases,the DNN hardware accelerators face the challenge of higher area overhead and energy consumption. In recent years,stochastic computing (SC) has been considered a way to realize deep neural networks and reduce hardware consumption. A probabilistic compensation algorithm is proposed to solve the accuracy problem of stochastic calculation,and a fully parallel neural network accelerator based on a deter-ministic method is designed. The software simulation results show that the accuracy of the probability compensation algorithm on the CIFAR-10 data set is 95.32％,which is 14.98％ higher than that of the traditional SC algorithm. The accuracy of the deterministic algorithm on the CIFAR-10 dataset is 95.06％,which is 14.72％ higher than that of the traditional SC algorithm. The results of Very Large Scale Integration Circuit (VLSI) hardware tests show that the normalized energy efficiency of the fully parallel neural network accelerator based on the deter-ministic method is improved by 31％ compared with the circuit based on binary computing.
      原文链接:
    • 万方数据
    • 维普

    Design of LCoS-Based Twin 1×40 Wavelength Selective Switch

    WANG HanLIU MaoqiFENG ZhenhuaLIU Minghuan...
    18-28页
    查看更多>>摘要：Wavelength selective switch (WSS) is the crucial component in the reconfigurable optical add/drop multiplexer (ROADM),which plays a pivotal role in the next-generation all-optical networks. We present a compact architecture of twin 1×40 liquid crystal on silicon (LCoS)-based WSS,which can be regarded as a 4f system in the wavelength direction and a 2f system in the switching direction. It is designed with theoretical analysis and simulation investigation. Polarization multiplexing is employed for two sources of twin WSS by polarization con-version before the common optical path. The WSS system attains a coupling efficacy exceeding 96％ for 90％ of the ports through simulation optimization. The 3 dB bandwidth can be achieved by more than 44 GHz at a 50 GHz grid for all 120 channels at all deflection ports. This work establishes a solid foundation for developing high-performance WSS with larger port counts.
      原文链接:
    • 万方数据
    • 维普

    Ultra-Low Linewidth Frequency Stabilized Integrated Lasers:A New Frontier in Integrated Photonics

    GU ZhenqianYANG ZhenZHA LuluHU Junhui...
    29-39页
    查看更多>>摘要：With the advancement of photonic integration technology,ultra-low linewidth frequency-stabilized lasers have demonstrated sig-nificant potential in precision measurement,quantum communication,atomic clocks,etc. This review summarizes the latest developments in integrated photonics for achieving ultra-low linewidth lasers,particularly breakthroughs made by integrating Brillouin lasers. We discuss the design principles,manufacturing processes,performance characteristics,and potential value of these lasers in various applications.
      原文链接:
    • 万方数据

    Monolithically Integrating a 180° Bent Waveguide into a Ⅲ-Nitride Optoelectronic On-Chip System

    ZHANG HaoYE ZiqiYUAN JialeiLIU Pengzhan...
    40-45页
    查看更多>>摘要：GaN-based devices have developed significantly in recent years due to their promising applications and research potential. A ma-jor goal is to monolithically integrate various GaN-based components onto a single chip to create future optoelectronic systems with low power consumption. This miniaturized integration not only enhances multifunctional performance but also reduces material,processing,and packag-ing costs. In this study,we present an optoelectronic on-chip system fabricated using a top-down approach on a Ⅲ-nitride-on-silicon wafer. The system includes a near-ultraviolet light source,a monitor,a 180° bent waveguide,an electro-absorption modulator,and a receiver,all in-tegrated without the need for regrowth or post-growth doping. 35 Mbit/s optical data communication is demonstrated through light propagation within the system,confirming its potential for compact GaN-based optoelectronic solutions.
      原文链接:
    • 万方数据

    Performance Characterization of Visible Light Communication Based on GaN High-Voltage LED/PD

    LU MeixinJIANG ZitongFANG LiYAN Yiqun...
    46-52页
    查看更多>>摘要：While considerable research has been conducted on the structural principles,fabrication techniques,and photoelectric properties of high-voltage light-emitting diodes (LEDs),their performance in light communication remains underexplored. A high-voltage series-connected LED or photodetector (HVS-LED/PD) based on the gallium nitride (GaN) integrated photoelectronic chip is presented in this pa-per. Multi-quantum wells (MQW) diodes with identical structures are integrated onto a single chip through wafer-scale micro-fabrication tech-niques and connected in series to construct the HVS-LED/PD. The advantages of the HVS-LED/PD in communication are explored by testing its performance as both a light transmitter and a PD. The series connection enhances the device's 3 dB bandwidth,allowing it to increase from 1.56 MHz to a minimum of 2.16 MHz when functioning as an LED,and from 47.42 kHz to at least 85.83 kHz when operating as a PD. The re-sults demonstrate that the light communication performance of HVS-LED/PD is better than that of a single GaN MQW diode with bandwidth and transmission quantity,which enriches the research of GaN-based high-voltage devices.
      原文链接:
    • 万方数据
    • 维普

    Multi-View Structured Light 3D Measurement System

    LU PingZHANG YingjieDENG FangweiLIU Wei...
    53-58页
    查看更多>>摘要：Vision-based measurement technology benefits high-quality manufacturers through improved dimensional precision,enhanced geo-metric tolerance,and increased product yield. The monocular 3D structured light visual sensing method is popular for detecting online parts since it can reach micron-meter depth accuracy. However,the line-of-sight requirement of a single viewpoint vision system often fails when hiding occurs due to the object's surface structure,such as edges,slopes,and holes. To address this issue,a multi-view 3D structured light vi-sion system is proposed in this paper to achieve high accuracy,i.e.,Z-direction repeatability,and reduce hiding probability during mechani-cal dimension measurement. The main contribution of this paper includes the use of industrial cameras with high resolution and high frame rates to achieve high-precision 3D reconstruction. Moreover,a multi-wavelength (heterodyne) phase expansion method is employed for high-precision phase calculation. By leveraging multiple industrial cameras,the system overcomes field of view occlusions,thereby broadening the 3D reconstruction field of view. Finally,the system achieves a Z-axis repetition accuracy of 0.48 μm.
      原文链接:
    • 万方数据
    • 维普

    A Filtering Coaxial Probe for Passive Intermodulation Characterization

    BAI YongjiangYANG JiyeZHU ShaohaoYANG Ye...
    59-66页
    查看更多>>摘要：Passive intermodulation (PIM) in communication systems is an unwanted interference caused by weak nonlinear current-voltage characteristics of radio frequency (RF) passive components. Characterization of PIM is important for both the study of PIM mechanisms and the location/suppression of PIM sources. PIM probes,made of open-ended coaxial transmission lines,have almost the same coupling strength to carriers and PIM products,and are usually used for near-field PIM characterization. Namely,it doesn't have any filtering capability. Therefore,it cannot stop the carrier power from entering into PIM tester's receiver,which may trigger active in-termodulation of the receiver and degrade the PIM tester's performance. To overcome this drawback,a passive filtering coaxial probe is proposed here. Compared with existing passive coaxial PIM probes,it has stronger coupling strength for PIM products than for carriers. Thus,the probe itself can block part of the carrier power entering into the PIM tester's receiver. This advantage helps improve PIM tes-ter's overall performance. Both theoretical analysis and experiments are conducted for demonstration. The proposed probe brings more possibility to PIM characterization.
      原文链接:
    • 万方数据
    • 维普

    Unsupervised Motion Removal for Dynamic SLAM

    CHEN HaoZHANG KaijiongCHEN JunZHANG Ziwen...
    67-77页
    查看更多>>摘要：We propose a dynamic simultaneous localization and mapping technology for unsupervised motion removal (UMR-SLAM),which is a deep learning-based dynamic RGBD SLAM. It is the first time that a scheme combining scene flow and deep learning SLAM is proposed to improve the accuracy of SLAM in dynamic scenes,in response to the situation where dynamic objects cause pose changes. The entire process does not require explicit object segmentation as supervisory information. We also propose a loop detection scheme that combines optical flow and feature similarity in the backend optimization section of the SLAM system to improve the accuracy of loop detection. UMR-SLAM is rewritten based on the DROID-SLAM code architecture. Through experiments on different datasets,it has been proven that our scheme has higher pose accuracy in dynamic scenarios compared with the current advanced SLAM algorithm.
      原文链接:
    • 万方数据
    • 维普