Sixteenth National Conference on Laser Technology and Optoelectronics最新文献_第3页

General calculation of transmission characteristics of programmable photonic integrated waveguide mesh 可编程光子集成波导网格传输特性的一般计算

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603167

Zhengyong Ji, Juan Zhang

{"title":"General calculation of transmission characteristics of programmable photonic integrated waveguide mesh","authors":"Zhengyong Ji, Juan Zhang","doi":"10.1117/12.2603167","DOIUrl":"https://doi.org/10.1117/12.2603167","url":null,"abstract":"Programmable photonic integrated waveguide mesh (PPIWM) is similar to field programmable gate array (FPGA) in electronics, which can be programmed to form a variety of topologies to provide different functions flexibly. In mesh structure, the calculation of transmission characteristics between arbitrary input and output ports is the premise to realize its application. With the continuous development of PPIWM in scale and structure, it is particularly important to automatically and efficiently calculate the transmission characteristics between input and output ports by programming. At present, the existing calculation method is complicated, which is not conducive to programming and has the prominent problems of low computational efficiency. In this paper, the mesh structure is mapped to a graph network represented by dual node, which is easy to be calculated programmatically. On this basis, a calculation method for solving the transfer function between arbitrary input and output ports required by the mesh is proposed by successively simplifying the nodes. This method can greatly reduce the time of solving the transfer function in the large and complex mesh structure, and has the advantages of easy programming and high efficiency. A specific example of the mesh is given to verify the effectiveness of the algorithm.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127958741","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

Generation and manipulation for high-order catastrophe swallowtail beams 高阶突变燕尾光束的产生与操纵

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603150

Houan Teng, Yiming Cai, Yanping Ian, Y. Qian

引用次数: 0

Preparation of superhydrophobic surface by laser ablation-chemical etching process on stainless steel 激光烧蚀-化学蚀刻法制备不锈钢超疏水表面

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603046

Qinghui Chen, Yukui Cai

引用次数: 0

Depth imaging through realistic fog using Gm-APD Lidar 使用Gm-APD激光雷达通过真实雾进行深度成像

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2601815

Yinbo Zhang, Sining Li, Peng Jiang, Jianfeng Sun, Liu Di, Xianhui Yang, Xin Zhang, Zhang Hailong

引用次数: 3

Research on hundred-watt level megahertz femtosecond pulse laser based on rod-type photonic crystal fiber 基于棒型光子晶体光纤的百瓦级兆赫飞秒脉冲激光器研究

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603024

Beibei Wang, Zhigang Peng, Zhaochen Cheng, Xu Yan, Pu Wang

引用次数: 2

Development of metrology and calibration device for ophthalmic optical instruments: fundus cameras 眼科光学仪器计量校准装置:眼底相机的研制

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603191

L. Duan, Xiuyu Li, Wenli Liu, Zhixiong Hu, Baoyu Hong

{"title":"Development of metrology and calibration device for ophthalmic optical instruments: fundus cameras","authors":"L. Duan, Xiuyu Li, Wenli Liu, Zhixiong Hu, Baoyu Hong","doi":"10.1117/12.2603191","DOIUrl":"https://doi.org/10.1117/12.2603191","url":null,"abstract":"In this article, a novel optical metrology and calibration device is designed, which can be used for the metrology and calibration of ophthalmic optical instrument - fundus cameras. Fundus camera is widely used in the field of diagnosing fundus diseases due to its high accuracy, simple structure and easy operation. The model eye we designed, including the cornea, lens and other major refractive parts of human eye can test multiple key parameters of fundus cameras, such as resolution, field of view, diopter and so on. A resolution board with micron-level precision for the detection of resolution is designed and processed by coating technology. The mechanical structures of the model eye including the cyclic structure for testing the field of view are designed and processed by 3D printing technology. In addition, different diopters have been developed for simulating nearsightedness and farsightedness. Testing results show that the model eye we designed can be used for metrology and calibration of fundus cameras, and has the advantages of high accuracy, high integration, strong stability and applicability.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122729534","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

Radiation spectrum characteristics of circularly polarized laser colliding electrons at different intensities 圆偏振激光在不同强度下碰撞电子的辐射光谱特性

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2600883

Zujie Chen, Xinmeng Shen, Youwei Tian

引用次数: 0

Virtual compressed sensing photoacoustic imaging using CoSaMP algorithm based on k-wave 基于k波的CoSaMP算法的虚拟压缩传感光声成像

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603479

Meijun Sun, Aojie Zhao, Bo Li, Jinhong Zhang, Qiming He, Xianlin Song

{"title":"Virtual compressed sensing photoacoustic imaging using CoSaMP algorithm based on k-wave","authors":"Meijun Sun, Aojie Zhao, Bo Li, Jinhong Zhang, Qiming He, Xianlin Song","doi":"10.1117/12.2603479","DOIUrl":"https://doi.org/10.1117/12.2603479","url":null,"abstract":"In recent years, photoacoustic imaging technology has developed rapidly and has become one of the most important technologies in the field of biomedical imaging. Photoacoustic imaging combines the characteristics of high contrast of optical imaging and strong penetrating power of acoustic imaging. It can obtain tissue imaging with high resolution and can also meet the requirements of quantitative analysis of changes in tissue function and physiological parameters at the same time. So, photoacoustic imaging plays an important role in disease prevention and cancer diagnosis. The traditional information acquisition of photoacoustic imaging is based on Nyquist sampling law (the sampling frequency must be greater than twice the highest signal frequency). This method will waste a lot of sampling resources in photoacoustic imaging with a large amount of data and put forward higher requirements for equipment. In order to break through the limitation of Nyquist sampling law, compressed sensing theory is used to compress and sample the signal. Then the original photoacoustic image is reconstructed by sparse key data. In this paper, Compressive Sampling Matching Pursuit (CoSaMP) is used as the reconstruction algorithm. And the compressed sensing photoacoustic imaging platform is built by K-Wave toolbox (photoacoustic imaging platform tool) of MATLAB simulation software together with the reconstruction algorithm to reconstruct the sparse photoacoustic signals observed. The qualitative and quantitative analysis is carried out on the reconstructed images. Results shows that the reconstruction effect meets the requirements, which verifies the superiority of compressed sensing theory and the reliability and advancement of compressed sensing photoacoustic imaging platform.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131566990","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: 1

Study on the influence of target parameters on the mechanical properties of laser propulsion 目标参数对激光推进力学性能影响的研究

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2602252

Sibo Wang, Hong Yanji, Bang-Deng Du, Hongjie Kong, Luyun Jiang, Mingyu Li, Heyan Gao, Chentao Mao

{"title":"Study on the influence of target parameters on the mechanical properties of laser propulsion","authors":"Sibo Wang, Hong Yanji, Bang-Deng Du, Hongjie Kong, Luyun Jiang, Mingyu Li, Heyan Gao, Chentao Mao","doi":"10.1117/12.2602252","DOIUrl":"https://doi.org/10.1117/12.2602252","url":null,"abstract":"The laser ablation micro thruster uses the target vapor or plasma jet generated by the laser ablation working fluid to obtain the reaction impulse and thrust. The working mode of the laser micro thruster is divided into two types, reflection type and transmission type. In this paper, the influence of plasma treatment on the bonding force between ablation layer and transparent layer is studied in transmission mode, and the influence of different kinds of substrate materials on the mechanical properties of laser ablation is studied. The results show that the surface activity of the PET transparent substrate is greatly improved by the formation of N-C=O or C=O active groups after plasma treatment, and the interlayer bonding force of the target band is increased by about 50%. Thus the peeling of the ablation layer and the transparent layer around the ablation pit after laser ablation target zone is eliminated. The light transmittance of PET substrate material is better than that of PI substrate material. In the case of the same thickness of ablation layer, the single pulse impulse and specific impulse of PET substrate target band are better than that of PI substrate material target band. The punching is better than the PI base material target tape. The optimization of target parameters provides guidance for further application of laser propulsion.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127009325","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

Reconstruction of infrared digital holography based on compressed sensing 基于压缩感知的红外数字全息重建

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603158

Haoliang Feng, Dongshun Zhang, S. Liu, Zi-li Zhang, Zhi-yuan Zheng, Haochong Huang

引用次数: 0