Photonics and Optoelectronics Meetings最新文献_第2页

Multiple wavelength laser generate in H2 pumped by Nd:YAG laser at 1064 nm Nd:YAG激光器在1064nm泵浦H2中产生多波长激光

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672789

X. Cai, Jinbo Liu, Ming Xu, Shu Hu, H. Cai, Jingwei Guo

引用次数: 0

Research on fusion splicing technology of 7-core fiber 7芯光纤熔接技术研究

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2671368

Xiaoyue Deng, Yucheng Yao, Lei Shen, Li Zhang, Mincheng Li, ze zhang

引用次数: 0

A simple method of measuring vibration frequency based on φ-OTDR 基于φ-OTDR的简单振动频率测量方法

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672638

Zesen Zhang, Jing Chen, Zhenhua Xu, Zujun Qin

{"title":"A simple method of measuring vibration frequency based on φ-OTDR","authors":"Zesen Zhang, Jing Chen, Zhenhua Xu, Zujun Qin","doi":"10.1117/12.2672638","DOIUrl":"https://doi.org/10.1117/12.2672638","url":null,"abstract":"Distributed vibration sensors by amplitude-demodulated phase sensitive optical time-domain reflectometers (φ-OTDR) have been widely used in many applications like safety monitoring of large-scale infrastructures and fence security. In order to locate vibrations, every two Rayleigh backscattering traces (RBTs) spaced apart by a certain interval (i.e., differential step k) are traditionally subtracted over a certain measurement time, and then all the subtractions are summed together and used to detect external vibration events. This method is denoted as amplitude-based accumulative differential method (ADM). Yet, the ADM has been demonstrated that the superimposing differential signal shows highly dependent on k which is closely related to vibration frequency (i.e., fs). Inappropriate k values would fail to locate the vibration. It is thus possible to envisage measuring fs by taking advantage of this strong dependence of the ADM on fs. In this manuscript, a simple method of estimating fs is proposed by measuring the relationship between the ADM signal and k. The validity of this method is demonstrated by our experiment, in which a vibration event induced by a sinusoidal-driven PZT is detected.","PeriodicalId":422113,"journal":{"name":"Photonics and Optoelectronics Meetings","volume":"272 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131544685","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 comparison between equivalent iterative method and transfer matrix method in the transmittance simulation of a single cavity all-dielectric thin film Fabry-Perot filter 等效迭代法与传递矩阵法在单腔全介质薄膜法布里-珀罗滤波器透射率模拟中的比较

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2671457

Xiao Xiao, Guo-rong Zhou

引用次数: 0

A self-calibrated single fiber scanning projectors 一种自校准单纤维扫描投影仪

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672790

Hanwen Du, Xu Wang, Lei Li, Jinghao Wu, Yang Li, Y. Meng, Xianchao Zhang, Zhiguo Jiang, Yi Li

引用次数: 0

Anomalous reflection and directional excitation of SPPs based on element additive metasurface 基于元加性超表面的spp异常反射与定向激发

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672851

Cong Chen, Hai Liu

{"title":"Anomalous reflection and directional excitation of SPPs based on element additive metasurface","authors":"Cong Chen, Hai Liu","doi":"10.1117/12.2672851","DOIUrl":"https://doi.org/10.1117/12.2672851","url":null,"abstract":"The efficient combination of multiple functions through a single, planar and compact metastructure has become an emerging research area, offering the possibility to design and realize highly integrated and miniaturized multifunctional devices in photonics, but Huge challenges still need to be solved, especially in the visible wavelengths. Here, we design the metasurface structure by means of unit structure addition, allowing the linear polarization to be effectively separated into x-polarized and y-polarized components at normal incidence, and achieve anomalous reflection of light waves and unidirectional excitation of Surface Plasmon Polaritons (SPPs). The structure can locally propagate the energy of SPPs more efficiently, or reflect more energy out through the phase gradient. When linearly polarized light of 1200 nm is incident vertically, two different linear phase gradients are generated along the same direction, resulting in the realization of the same metasurface distinctly different functions. Among them, by analyzing the local electric field distribution caused by the interaction between the incident light and the structure, it can be clearly found that the x-polarized light effectively excites surface plasmons (SPPs), and most of the energy propagates to the right along the surface of the structure. The y-polarized light achieves an abnormal reflection of 30°, and it is verified that the large-angle deflection characteristic of 20°-60° can be achieved in the wavelength range of 1000nm-1500nm. The bifunctional metasurface developed in this study can provide ideas and methods for the study of photonic integrated devices in the optical band.","PeriodicalId":422113,"journal":{"name":"Photonics and Optoelectronics Meetings","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126347187","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

Photonic generation of phase-coded linearly frequency modulation signals with increased TBWP 增加TBWP的相位编码线性调频信号的光子产生

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672773

Weilei Gou, Lin Wang, Yu Yu, Xinliang Zhang

引用次数: 0

Generation of all-fiber third-order orbital angular momentum modes based on femtosecond laser irradiation 基于飞秒激光辐照的全光纤三阶轨道角动量模式的产生

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672639

Han Wu, Liao Chen, X. Shu, Xinliang Zhang

引用次数: 0

Design of semiconductor laser diagnostic system based on memristor neural network 基于忆阻神经网络的半导体激光诊断系统设计

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672739

Hao Li, Jia Hua yu, Biao Luo

{"title":"Design of semiconductor laser diagnostic system based on memristor neural network","authors":"Hao Li, Jia Hua yu, Biao Luo","doi":"10.1117/12.2672739","DOIUrl":"https://doi.org/10.1117/12.2672739","url":null,"abstract":"With the rapid development and breakthrough of semiconductor laser technology, the quality of semiconductor laser products, wavelength ranges and output power are rapidly improving, and the product range is becoming increasingly rich. Semiconductor lasers have the advantages of small size, light weight, high electro-optical conversion efficiency, stable performance, high reliability and long life, etc., and have revealed their dominant position in the field of lasers At present in the semiconductor laser research, semiconductor lasers are prone to defects under the influence of various environmental factors. In the traditional way, manual miscopy is a commonly used method of detecting surface defects. However, because of its low sampling rate, poor accuracy, low efficiency and large labor costs, manual microscopy cannot meet the needs of quality inspection. In order to solve the problem of high quality control and production costs in the microscopy process, we designed a trouble shooting method for convolutional neural networks. This paper attempts to implement a single-conductor laser radiation fault diagnosis system based on memristor convolutional neural network, and studies the integrated diagnosis system of integrated circuit electrical faults and radiation faults. Firstly, we should classify the problems that often arise in semiconductor lasers. Then the data in the fault state is collected through modeling simulation to form a data set. Finally, the dataset is classified and diagnosed by writing program. After training, the neural network fully realizes the classification diagnosis of radiated fault data and normal working data. The accuracy of the program is up to 95% or more.","PeriodicalId":422113,"journal":{"name":"Photonics and Optoelectronics Meetings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125265897","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

On-chip digitally-tunable dispersion management 片上数字可调色散管理

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672783

Shujun Liu, Dajian Liu, Zejie Yu, Liu Liu, Yaocheng Shi, D. Dai

引用次数: 0