Volume: 48 Issue 11
23 Article(s)

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Beam Transmission and Control
Annular and Hollow-Core Photonic Crystal Fiber for Propagation of Multi-Order Vorticity
Xiaoling Jin, Youwei Wang, Bing Sun, Zuxing Zhang, and Mingyang Chen
Objective Orbital angular momentum (OAM) beams have recently spurred great interest because they are widely applicable to optical manipulation, quantum information, imaging, and communications. The four states of the OAMl,mmode family have been already demonstrated in multiple-input multiple-output (MIMO)-free transmis
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1105001 (2021)
Biomedical Photonics and Laser Medicine
A Portable fNIRS-Topography System for BCI Applications: Full Parallel Detection and Pilot Paradigm Validation
Yang Liu, Dongyuan Liu, Yao Zhang, Lu Bai, and Feng Gao
Objective Functional near-infrared spectroscopy (fNIRS) is an effective neuroimaging tool used to directly determine changes in oxygenated hemoglobin (HbO) and deoxygenated hemoglobin (HbR). This technique offers portable and radiation-free alternatives to conventional neuroimaging modalities, such as functional magnet
  • Publication Date: Jun. 04, 2021
  • Vol. 48 Issue 11 1107001 (2021)
Fiber Optics and Optical Communications
Silicon-Based Integrated Device for Electro-Optic Modulation Assembly with Mode-Division Multiplexing
Tong Xiang, Heming Chen, and Yuchen Hu
Objective As the package size of high-speed optical communication devices becomes smaller, and the performance requirements get higher, it is not easy for traditional electro-optic modules with separated components to meet the demands of modern communication. Currently, electro-optic devices are developing toward highl
  • Publication Date: Jun. 04, 2021
  • Vol. 48 Issue 11 1106001 (2021)
Holography and Information Processing
Shallow-Water LiDAR Echo Signal Denoising Based on Improved EWT
Tingting Wei, Jiazhi Yang, Guoqing Zhou, Xiang Zhou, and Xueqin Nong
Objective It is difficult to reap the target distance and features from the shallow-water LIDAR echo signals with a low SNR, hence noise reduction is imperative. The noises in full-waveform echo signals caused by the LiDAR system in our laboratory can be divided into background noise, detector noise and preamplifier no
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1109001 (2021)
Laser Devices and Laser Physics
Femtosecond Chirped Pulse Amplification System with Liquid Crystal Spatial Light Modulator for Spectral Modulation
Yufei Duan, Feng Li, Zhi Yang, Qianglong Li, Yang Yang, Tianhao Wu, Yishan Wang, and Xiaojun Yang
Objective Compared with traditional solid-state lasers, such as slats and wafers, femtosecond fiber lasers have many advantages, including compact structures, good beam quality, stable systems, and good heat dissipation. They are widely used in various application fields, particularly in the field of fine material proc
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1101001 (2021)
Research on Erbium-Doped Fiber Lasers Using Chirped Pulse Amplification Method Based on Broadband Chirped Fiber Grating
Zengchao Wang, Kuo Meng, Kai Chen, Lianqing Zhu, and Fei Luo
Objective Fiber lasers have been widely used in scientific research, industrial processing, biomedical, and other fields because they offer unique characteristics such as good heat dissipation, high light-light conversion efficiency, and excellent beam quality. As a classic fiber laser, the erbium-doped fiber laser wit
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1101002 (2021)
Optical Compensation Method for Pigtail Module in High-Brightness Laser Diodes
Quanwei Jiang, Lanping Zhang, Linhui Guo, Hao Tan, Hualing Wu, Bo Fu, Nisha Zhang, Fengqun Zhang, Weichuan Du, Deyong Wu, and Songxin Gao
Objective The laser diode(LD) coupled with the fiber is an effective and high-quality pump source of fiber and solid lasers. Although this technology is relatively mature, its efficiency, structure, and optical design need to be optimized. The optical alignment and adjustment directly influence the efficiency of the LD
  • Publication Date: Jun. 04, 2021
  • Vol. 48 Issue 11 1101003 (2021)
Algorithm Optimization for Fast Simulation of 3.5 μm Dual-Wavelength Pumped Er∶ZBLAN Fiber Laser
Luo Wang, Chuanfei Yao, Pingxue Li, Xi Zhang, Yongjing Wu, Xuan Wang, and Linjing Yang
Objective Mid-infrared fiber laser between 2 and 5 μm has many crucial applications, such as military confrontation, medicine, remote sensing, and spectroscopy, making them a research hotspot in the field of laser technology. Recently, researchers used fluoride glass fibers doped with various rare-earth ions as gain me
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1101004 (2021)
Materials and Thin Films
Spectral Performance of Yb 3+-Doped Silica Fiber for 1018 nm Tandem-Pumping Technology
Hehe Dong, Shikai Wang, Zhongyue Wang, Chunlei Yu, Chongyun Shao, Wei Wei, and Lili Hu
Objective Compared with the traditional pump light source of 915 nm or 975 nm diode lasers, the 1018 nm Yb 3+-doped fiber laser (YDFL) with a tandem-pumping structure is a high-efficiency pump light source for high-power lasers and offers the advantages of excellent beam quality, high brightness, and low quantum loss.
  • Publication Date: Jun. 04, 2021
  • Vol. 48 Issue 11 1103001 (2021)
Phase Transformation Process of Electromagnetic Induction Assisted Laser Quenching Based on MSC. Marc Software
Qunli Zhang, Jian Lin, Zhijun Chen, Zehao Tang, Hua Huang, Yuan’an Gao, and Jianhua Yao
Objective Heavy load bearing is an essential part of heavy load mechanical equipment, which plays the role of supporting a rotating body. Wind power bearing in wind power generation equipment is a typical heavy load bearing. To obtain wind power bearing with excellent comprehensive performance and high service life as
  • Publication Date: Jun. 04, 2021
  • Vol. 48 Issue 11 1103002 (2021)
Measurement and Metrology
Photo-Elastic Modulation Based on Adaptive Regulation of Driving Voltage
Zhenkun Liang, Xiao Li, Zhibin Wang, Kewu Li, and Xiaoyang Zang
Objective With the advantages of high modulation precision, high efficiency, and wide spectral range, photo-elastic modulation technology has attracted considerable attention in many fields, such as optical communication, polarization analysis, and spectral analysis. A series of devices with a photo-elastic modulator a
  • Publication Date: May. 21, 2021
  • Vol. 48 Issue 11 1104001 (2021)
Internal Propulsion Algorithm for Extracting Center of Line Laser Stripe
Weiming Li, Feng Mei, Zeng Hu, Xingyu Gao, and Haoyong Yu
Objective Line-structured light three-dimensional (3D) measurement system is widely used in object measurement, target detection, and other fields. The laser stripe center extraction algorithm is the key technology in the system. The center of robust and uniform laser stripe is easily extracted. However, in many indust
  • Publication Date: Jun. 08, 2021
  • Vol. 48 Issue 11 1104002 (2021)
Method for Compensating Thermal Deformation Error in Transfer Station of Variable Curvature Workpiece
Zhuyue Li, Maosheng Hou, Zhichao Liu, and Lijuan Li
Objective Large-size measurements are usually accomplished through multistation measurements. The accuracy of the instrument, environmental vibration, temperature change, and other factors severely affect the accuracy of the transfer station. To improve the accuracy of large-size measurements, many scholars have conduc
  • Publication Date: May. 21, 2021
  • Vol. 48 Issue 11 1104003 (2021)
Rapid Communications
[in Chinese]
Jiuru He, Rui Song, Weiqiang Yang, and Jing Hou
  • Publication Date: May. 21, 2021
  • Vol. 48 Issue 11 1116001 (2021)
[in Chinese]
Xin Zhang, Ke Yin, Jianghua Zhang, Qinghui Deng, Xin Zheng, Xiangai Cheng, and Tian Jiang
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1116002 (2021)
Remote Sensing and Sensor
Estimation of Turbulence Parameters in Atmospheric Boundary Layer Based on Doppler Lidar
Xiang Jin, Xiaoquan Song, Jiaxin Liu, Long Yun, and Shiyong Shao
Objective In the atmospheric boundary layer, studying the formation and development of turbulence is of significant interest to numerical weather prediction, atmospheric dynamics, mechanical structure safety of wind power equipment, and aviation safety. The refractive index structure constant Cn2 and turbulent energy d
  • Publication Date: Jun. 02, 2021
  • Vol. 48 Issue 11 1110001 (2021)
Distributed Fiber-Optic Dynamic Strain Sensor Based on Spectra Correlation of Rayleigh Backscattering
Yifan Wang, Qingwen Liu, He Li, Dian Chen, and Zuyuan He
Objective The distributed fiber-optic strain sensor based on the spectra of Rayleigh backscattering can detect static and dynamic signals. In addition, it is immune to interference fading. The Rayleigh scattering spectra of the optical fiber can be obtained using single-shot detection with frequency chirped pulses and
  • Publication Date: Jun. 08, 2021
  • Vol. 48 Issue 11 1110002 (2021)
LiDAR Data Classification Based on Dilated Convolution Capsule Network
Aili Wang, Yuxiao Zhang, Haibin Wu, Kaiyuan Jiang, and Yuji Iwahori
Objective LiDAR, as an essential technical means of obtaining physical attributes of ground objects, is widely used in remote sensing image classification research. Recently, deep learning algorithms that use multilayer nonlinear transformation methods to automatically extract features have become mainstream in the fie
  • Publication Date: Jun. 04, 2021
  • Vol. 48 Issue 11 1110003 (2021)
Multispectral LiDAR Data Intensity Calibration and Point Cloud Color Optimization
Dong He, Shalei Song, Binhui Wang, Xiong Cao, Zhongzheng Liu, and Jinye Zhang
Objective With the development of light detection and ranging (LiDAR) imaging technology, LiDAR imaging from monochromatic detection to multihyperspectral detection has developed into a new trend. Monochrome laser radar point clouds, different from traditional camera or multispectral image data fusion for visual color
  • Publication Date: Jun. 08, 2021
  • Vol. 48 Issue 11 1110004 (2021)
Research on Retrieval Method of Low-Altitude Wind Field for Rayleigh-Mie Scattering Doppler Lidar
Fahua Shen, Peng Zhuang, Bangxin Wang, Chenbo Xie, Chengqun Qiu, Dong Liu, and Yingjian Wang
Objective Wind is a critical variable for applications such as numerical weather prediction and climate study. The direct-detect Rayleigh-Mie Doppler lidar is currently one of the most effective tools for tropospheric to stratospheric wind field detection with high accuracy and spatiotemporal resolution. However, owing
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1110005 (2021)
Advances in Ga2O3-Based Solar-Blind Ultraviolet Photodetectors
Jiang Wang, and Linbao Luo
Significance The sunlight with a wavelength shorter than 280 nm cannot penetrate the atmosphere and reach the surface of the earth, for which the 200--280 nm waveband is typically referred to as solar-blind region. In recent years, solar-blind ultraviolet photodetectors are widely used in military and civil fields such
  • Publication Date: Apr. 28, 2021
  • Vol. 48 Issue 11 1100001 (2021)
Development of Laser Gas Analyzer for Eddy Correlation Method
Mingxing Li, Zhenyu Xu, Ruifeng Kan, Yabai He, Lu Yao, Bing Chen, Jun Ruan, Bangyi Tao, and Hao Liu
Objective As a method for directly observing turbulent motions without parametric assumptions, the eddy correlation method is undoubtedly the most advanced and preferred flux observation method at present. This method is widely used in ecological flux observations. The basic equipment of the eddy-related measurement sy
  • Publication Date: Jun. 04, 2021
  • Vol. 48 Issue 11 1111001 (2021)
Ultrafast Spectral Response of Many-Body Effects During Exciton Formation in Multilayer MoS2
Sen Guo, Xin Zhao, Zhaogang Nie, Lin Ma, Fangteng Zhang, Weiren Zhao, Xinzhong Li, Jiahua Zhang, and Wenchun Zhang
Objective Two-dimensional (2D) transition metal dichalcogenides (TMDs) have attracted significant attention due to their uniquely controllable properties. Their strong excitonic effects dominate the optical and electronic responses in 2D-TMDs. Coulomb interactions among carriers in the exciton formation process give ri
  • Publication Date: May. 20, 2021
  • Vol. 48 Issue 11 1111002 (2021)