Applied Optics and Photonics China最新文献_第5页

High extinction ratio of silicon photonics Mach–Zehnder IQ-modulators with wide optical bandwidth through power compensation 通过功率补偿实现具有宽光带宽的高消光比硅光子马赫-泽恩德 IQ 调制器

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3000931

Shi-Chao Zhu, Xi Guo, Gui-Dong Deng, Xun Lei, Quan Cao

引用次数: 0

Simulation of thermal focal length of conduction cooling end-pumped slat laser amplifier 传导冷却端泵浦板条激光放大器热焦距模拟

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3009375

Wentao Wang, S. Bian, Lei Liu, Chao Wang, Lu Chen

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Design on amplitude control circuit for DDS signal source based on AD9834 基于 AD9834 的 DDS 信号源振幅控制电路设计

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3004528

Bo Li, Zhengguang Wang, Helun Song, Xiping Xu

{"title":"Design on amplitude control circuit for DDS signal source based on AD9834","authors":"Bo Li, Zhengguang Wang, Helun Song, Xiping Xu","doi":"10.1117/12.3004528","DOIUrl":"https://doi.org/10.1117/12.3004528","url":null,"abstract":"To ensure the proper operation of the Nuclear Magnetic Resonance Gyroscope (NMRG), a dedicated amplitude control circuit has been designed for the gas chamber. This circuit aims to fulfill the high-temperature heating requirements of the gas chamber, including achieving saturated vapor pressure, higher density, and ensuring the precise temperature stability of the gas chamber. The stability is of utmost importance as it directly impacts the accuracy of the NMRG. The circuit employs a voltage-output DAC1220, connected in series with a resistor, to drive the FS ADJUST pin of the AD9834. This configuration allows precise adjustment of the amplitude of the full-scale DAC current. The resulting signal is then amplified using a current-to-voltage conversion resistor and an Enhanced Howland Current Source (EHCS) circuit, effectively meeting the requirements for heating the gas chamber. The simulation and experiment show that the successful achievement of an AC sinusoidal heating signal with a frequency of 100KHz and a precise amplitude adjustment rangeof0-150mA.The adjustable step size of 0.01v ensures fine-tuned control. These findings validate that the heating signal fulfills the requirements for high-frequency electrical heating of the gas chamber in the NMRG.","PeriodicalId":502341,"journal":{"name":"Applied Optics and Photonics China","volume":"39 8","pages":"129590F - 129590F-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139174794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel cost-effective vivo facial detection technique based on snapshot spectral imaging sensor 基于快照光谱成像传感器的经济高效的新型活体面部检测技术

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007681

Zhihai Wang, Shuai Wang, Bo Gao, Tianxin Wang, Lvrong Zhao, Weixing Yu

引用次数: 0

Design of photonic-crystal-modulated narrowband multichannel filters for visible light with high transmittance 设计高透过率可见光光子晶体调制窄带多通道滤波器

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007882

Tianxin Wang, Shuai Wang, Bo Gao, Weixing Yu

引用次数: 0

Demonstration of MWP radar by hardware-in-the-loop simulation based on tunable MWP generated signal and electric receiving link 通过基于可调 MWP 信号和电接收链路的硬件在环仿真演示 MWP 雷达

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007820

Shuguang Li, K. Guo, Kaili Qin, Tingyao Xie, Lele Zhu, Xi Ye, Zhenbin Lv, Wenbin Lu

{"title":"Demonstration of MWP radar by hardware-in-the-loop simulation based on tunable MWP generated signal and electric receiving link","authors":"Shuguang Li, K. Guo, Kaili Qin, Tingyao Xie, Lele Zhu, Xi Ye, Zhenbin Lv, Wenbin Lu","doi":"10.1117/12.3007820","DOIUrl":"https://doi.org/10.1117/12.3007820","url":null,"abstract":"Demonstration of LFMCW radar system by hardware-in-the-loop simulation based on tunable microwave photonics generated radar signal and electric receiving link is presented. The seed signal is given by Direct Digital Synthesis (DDS) with tunable signal wave forms, which can afford the system with different time-width and bandwidth. The microwave photonics electro-optic modulation and photoelectric transformation system turns the seed signal with low-frequency and narrow-bandwidth into the signal by 4 times at frequency carried on the laser through the dualparallel electro-optic modulator, and obtain the high-frequency and broadband radar signal after the photoelectric detector, and then transmit the radar signal into the input port of the hardware-in-the-loop simulator with time delay function. The radar signal is set as different delay corresponding to different transmission distance, such as 1km, 2km, and other distances. After the hardware-in-the-loop simulator with some distance delay, the signal is transmitted from the output ort of the hardware-in-the-loop simulator into the receiver. In the receiving link, the electric de-chirping method is carried out to down convert the radar echo signal. After electric ADC, the ranging data is processed. Two typical wave forms, such as the wave form with 1GHz bandwidth and 2ms pulse width, and the other wave form with 2GHz bandwidth and 8ms are operated through the system respectively. The demonstration by hardware-in-the-loop simulation has been given, and the experimental results show that the range of frequency modulated continuous wave radar based on this system can reach 5 km.","PeriodicalId":502341,"journal":{"name":"Applied Optics and Photonics China","volume":"26 1","pages":"129661X - 129661X-5"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139173106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of satellite platform angular velocity prediction based on Kalman filter in optical image stabilization system 基于卡尔曼滤波器的卫星平台角速度预测在光学图像稳定系统中的应用

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007599

Qifan Cheng, Yan Wen, Wencan Li

{"title":"Application of satellite platform angular velocity prediction based on Kalman filter in optical image stabilization system","authors":"Qifan Cheng, Yan Wen, Wencan Li","doi":"10.1117/12.3007599","DOIUrl":"https://doi.org/10.1117/12.3007599","url":null,"abstract":"With the rapid advancement of space astronomical observation technology, there is an increasing demand for higher camera imaging quality. The micro-vibrations generated by internal disturbances of the satellite platform are the primary factors affecting encircled energy of disc of confusion in star image point. The traditional optical image stabilization system compensates for the disturbance by acquiring the variation of the centroid coordinates of the image point as an error feedback of the system, which has the problems of obvious lag and insufficient rapid response ability. To overcome the problem, a method based on optical image stabilization system for predicting angular velocity was proposed and on the basis of measuring the angular velocity of the Satellite bus as the error feedback of the systemin this paper. The measured data are predicted using a combination of current statistical model (CS) and Kalman filtering algorithm. The simulation results in MATLAB demonstrate that the image stabilization system's line of sight stabilization is better than1\".It is shown that the method proposed in this paper has feasibility in the optical image stabilization system, the proposed algorithm has the characteristics of high robust and low computing load, and can accurately and effectively predict the vibration information of satellite platform in advance, and provide help for the rapid implementation of vibration suppression measures.","PeriodicalId":502341,"journal":{"name":"Applied Optics and Photonics China","volume":"58 3","pages":"129630Z - 129630Z-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139173125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement method for the key terminal ballistic parameters of the supersonic projectile using the sparse distribution detector array 利用稀疏分布探测器阵列测量超音速弹丸关键末端弹道参数的方法

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3006337

Ziyu Yang, Chenghua Deng, Ding Chen

{"title":"Measurement method for the key terminal ballistic parameters of the supersonic projectile using the sparse distribution detector array","authors":"Ziyu Yang, Chenghua Deng, Ding Chen","doi":"10.1117/12.3006337","DOIUrl":"https://doi.org/10.1117/12.3006337","url":null,"abstract":"The article proposes a measurement method using the sparse distribution detector array, and it can accurately measure the key terminal ballistic parameters (including hitting coordinates, flight velocity, firing angle and firing rate, etc.) of the supersonic projectile. Firstly, we describe the shock wave of the supersonic projectile and its propagation characteristics. What is more, the detection principle of the system is presented. Secondly, its measurement model is established through combining with the relevant structural parameters and the shock wave propagation velocity in the detection area. Next, the system is developed, and it mainly consists of several pairs of laser emitters and their receivers, two support frames, and a signal conditioning circuit. Finally, the systematic errors of the above parameters are analyzed through numerical simulation, respectively. The results show that the measurement method can meet the requirements for testing the terminal ballistic parameters of the supersonic projectile. Compared with the previous methods, it has the advantages such as better uniformity detection sensitivity, high accuracy, lower cost, easy installation and adjustment.","PeriodicalId":502341,"journal":{"name":"Applied Optics and Photonics China","volume":"20 5","pages":"129590N - 129590N-11"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139174276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-resolved imaging correction of irising effect of gated image intensifiers 时间分辨成像校正门控图像增强器的虹吸效应

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007212

Xinyu Zhong, Xinwei Wang, Liang Sun, Yan Zhou

引用次数: 0

An improved calibration method and detection error simulation for three-wavelength polarization lidar systems 三波长偏振激光雷达系统的改进校准方法和探测误差模拟

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007111

Laibin Wang, Dong Liu

{"title":"An improved calibration method and detection error simulation for three-wavelength polarization lidar systems","authors":"Laibin Wang, Dong Liu","doi":"10.1117/12.3007111","DOIUrl":"https://doi.org/10.1117/12.3007111","url":null,"abstract":"Polarization lidar plays an important role in detecting the microphysical properties of non spherical aerosol particles in the atmosphere and the indirect interaction between aerosols and clouds. However, there are various complex optoelectronic components in polarization lidar systems, and the imperfect nature of these components often poses difficulties for the system to accurately receive data. To ensure the accuracy of the detection data of a multi wavelength polarization lidar system, precise calibration of the system is a crucial step. This article is based on a three wavelength (355nm, 532nm, 1064nm) polarization lidar system. Based on the ± 45 ° polarization lidar system calibration method proposed by Freudenthaler et al, an improved calibration method is designed to calibrate different wavelength detection channels. The new calibration method corrects some issues with the ± 45 ° method and proposes a calculation method to reduce the impact of cascading multiple dichroic mirrors on the received Signal The simulation results show that the use of the average polarization error angle successfully reduces the impact of cascading multiple dichroic mirrors on the signal. At the end of the article, we validated the error analysis of the proposed method under different detection wavelengths through simulation calculations. The results show that when detecting extremely small atmospheric particles such as atmospheric molecules, the detection error is around 6%. When detecting non spherical particles with a depolarization ratio greater than 0.1, the error of each detection channel can be reduced to less than 3%.","PeriodicalId":502341,"journal":{"name":"Applied Optics and Photonics China","volume":"15 5","pages":"129620M - 129620M-12"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139175257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0