International Conference on Optical Instruments and Technology最新文献

Chaotic physical security scheme based on variational auto-encoder for OFDM-PON 基于变分自编码器的OFDM-PON混沌物理安全方案

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2619526

Xiaorong Zhu, Bo Liu, Jianxin Ren, Xu Zhu, Yaya Mao, Xiangyu Wu, Mingye Li, Shuaidong Chen, Yu Bai

{"title":"Chaotic physical security scheme based on variational auto-encoder for OFDM-PON","authors":"Xiaorong Zhu, Bo Liu, Jianxin Ren, Xu Zhu, Yaya Mao, Xiangyu Wu, Mingye Li, Shuaidong Chen, Yu Bai","doi":"10.1117/12.2619526","DOIUrl":"https://doi.org/10.1117/12.2619526","url":null,"abstract":"This paper proposed a novel chaotic physical security scheme based on Variational Auto-Encoder (VAE) for optical frequency division multiplexing-passive optical networks (OFDM-PON). We adopt the deep generative model VAE to generate chaotic sequences for the encryption of OFDM symbols. Different chaotic security schemes are included to improve the key space and sensitivity of chaotic models, thus enhancing the security of the OFDM-PON system. With the training materials of different chaotic security schemes, VAE can learn the complex structure of data distribution in various chaotic models and finally has the ability to generate the key group with a large space. Meanwhile, the benchmark performance of the OFDM system is experimentally investigated in terms of the bit error rate (BER). Moreover, owing to the parallel computing of GPU, the time consumed for training of VAE can be reduced to a large extent, and the time for generation of chaotic sequences via VAE is only 1.38% of that via repeated iteration of equations, which highlights the remarkable reduction in complexity of the chaotic physical security scheme.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"12278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130570565","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 SVM algorithm based on thulium doped fiber ring system in ammonia quantitative analysis 基于掺铥纤维环系统的SVM算法在氨定量分析中的应用

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616443

Jifang Shan, Kun Liu, Junfeng Jiang, Yafan Li, Tiegen Liu

引用次数: 0

Whisker array based on fiber Bragg grating for surface shape sensing 基于光纤布拉格光栅的晶须阵列表面形状传感

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616426

Haokun Yang, Shuanghao Wang, Kun Liu, Chenyu Fang, Zhiyuan Li, Jinglong Zhang, Tiegen Liu

{"title":"Whisker array based on fiber Bragg grating for surface shape sensing","authors":"Haokun Yang, Shuanghao Wang, Kun Liu, Chenyu Fang, Zhiyuan Li, Jinglong Zhang, Tiegen Liu","doi":"10.1117/12.2616426","DOIUrl":"https://doi.org/10.1117/12.2616426","url":null,"abstract":"In this paper, a whisker array sensor for object surface shape measurement is designed and experimentally demonstrated. The developed sensor is based on a 4×4 whisker array with fiber Bragg grating, which imitates the structure of the facial whiskers of animals like mice and dogs. The surface shape reconstruction is based on the curvature information of each sensing point by measuring the wavelength shift of each fiber Bragg grating fixed on the whisker. The conversion coefficient between wavelength shift and bending curvature is obtained then the change of fiber Bragg grating is converted into corresponding bending curvature. The measurement error on the altitude of the whisker of each sensing point is about 1.2%. By curve fitting the curvature information of the whole fiber Bragg grating whisker array, the surface shape of the target surface is reconstructed. In this experiment, the spatial resolution of the sensor is 10 mm, which can theoretically meet the need of any spatial resolution by adjusting the measurement algorithm. The design successfully realizes surface shape sensing, which has important practical value in the field of robot tactile, in aviation and disaster relief.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121769506","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

Wavelength switchable mode-locked fiber laser using optical switch 采用光开关的波长可切换锁模光纤激光器

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620525

Z. Xie, Ya Liu, Yong-Wen Zheng, X. Tan

{"title":"Wavelength switchable mode-locked fiber laser using optical switch","authors":"Z. Xie, Ya Liu, Yong-Wen Zheng, X. Tan","doi":"10.1117/12.2620525","DOIUrl":"https://doi.org/10.1117/12.2620525","url":null,"abstract":"Programmable and fast wavelength-switchable ultrashort pulses have important applications in optical communication, optical sensing, micro-wave photonics, and other fields. Multi-wavelength mode-locked lasers are commonly developed to achieve wavelength tunability by using tunable optical filters, fiber Bragg gratings, Lyot filters providing the direct spectral manipulation of the pulses. Actually, manual control is essential in process of wavelength switching, which is very time-consuming and sometimes it is difficult to find the appropriate state of polarization for a certain mode-locking state when utilizing polarization adjustment. So a programmable mode-locked laser which can automatically switch to different mode-locking states is desired. Here, we demonstrate a fast electrically-controlled wavelength-switching scheme in ultrafast nonlinear polarization rotation mode-locked lasers. It is achieved by simply introducing an inline polarization beam splitter (PBS) with two output ports and followed by a 1×2 electrically-controlled optical switch in a fiber ring laser. By utilizing the polarization-maintaining-fiber-pigtailed inline PBS and a polarization controller, a nonlinear polarization evolution (NPE) mode-locking effect as well as a tunable Lyot filter are enabled in the fiber cavity. The optical switch could select the optical path with different polarization state for mode-locking at different wavelength.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130444404","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

Distributed pH sensing based on optical frequency domain reflectometry 基于光频域反射法的分布式pH传感

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616491

Han Xiao, Huafeng Lu, Zeheng Zhang, Guolu Yin, T. Zhu

引用次数: 0

Inversion and verification analysis of GF-1 WFV 16-meter reflectance data GF-1 WFV 16米反射率反演与验证分析

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2619973

Shaobo Liu, L. Liu, Xianghao Kong, Xiangyu Zhu, Shutao Ge, Guangjun He

引用次数: 0

Investigation on the linewidth tolerance of the space coherent laser communication system under atmospheric turbulence 大气湍流条件下空间相干激光通信系统线宽容限研究

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620513

Wanwang Fu, Yijun Jiang, Yuexing Zhang, Jiahan Li, Mi Li

{"title":"Investigation on the linewidth tolerance of the space coherent laser communication system under atmospheric turbulence","authors":"Wanwang Fu, Yijun Jiang, Yuexing Zhang, Jiahan Li, Mi Li","doi":"10.1117/12.2620513","DOIUrl":"https://doi.org/10.1117/12.2620513","url":null,"abstract":"Quadrature Phase Shift Keying (QPSK) is an important digital signal modulation method, which has the advantages of high spectrum efficiency and strong anti-interference. Coherent laser communication has the advantages of high speed, large capacity, light and small equipment as well as high sensitivity. In order to better introduce the QPSK modulation method into the space downlink coherent laser communication system, we give a bit error rate (BER) of QPSK modulation model with laser linewidth suitable for space downlink coherent laser communication system with QPSK modulation under atmospheric turbulence. Based on the model, we simulate and analyze the effects of atmospheric wind speed, zenith angle, gain of Erbium doped optical fiber amplifier (EDFA) and communication rate on the linewidth tolerance of space downlink coherent laser communication system with QPSK modulation. The results show that the linewidth tolerance of the system increases when the zenith angle decreases or the gain of EDFA increases or the wind speed decreases. And the effects of zenith angle, gain of EDFA and communication rate on the linewidth tolerance of the space downlink coherent laser communication system with QPSK modulation are large. The effect of wind speed on the linewidth tolerance of space downlink coherent laser communication system with QPSK modulation is smaller. And the larger the wind speed is, the smaller the effect of increasing wind speed on the linewidth tolerance. For the communication rate, the linewidth tolerance increases and then decreases with the increase of the communication rate. This work can be a reference for the design of space downlink coherent laser communication system with QPSK modulation.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"12278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128863407","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 denoising and positioning method of long-distance fiber optic perimeter security system based on φ-OTDR 基于φ-OTDR的长距离光纤周界安防系统去噪定位方法

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616554

Sichen Li, Kun Liu, Junfeng Jiang, Zhenshi Sun, Kang Xue, Yuelang Huang, Xibo Jin, Tiegen Liu

{"title":"A denoising and positioning method of long-distance fiber optic perimeter security system based on φ-OTDR","authors":"Sichen Li, Kun Liu, Junfeng Jiang, Zhenshi Sun, Kang Xue, Yuelang Huang, Xibo Jin, Tiegen Liu","doi":"10.1117/12.2616554","DOIUrl":"https://doi.org/10.1117/12.2616554","url":null,"abstract":"In this paper, we propose an improved denoising and positioning method for fiber optic perimeter security system based on the φ-OTDR. We combine the lifting scheme of the discrete wavelet transform (LSDWT) and the total variation (TV) based image denoising algorithm to suppress the background noises and magnify the man-made intrusion signals, and the positions of man-made intrusion can be acquired with the denoised signals through the variance-based positioning method, which mainly determines the man-made intrusion signals by calculating the variance of the temporal signal. A series of experiments have been carried out to validate this method. In the scheme, three types of man-made intrusion behaviors such as knocking, waggling, and tapping were implemented at the end of the 40 km optical cable, while the background noises such as natural noise and sound of car driving were continuing. Compared with the original signals, the peak signal-to-noise ratio (PSNR) of the signals after the proposed scheme has been greatly enhanced, and a ±15m positioning error can be realized at the end of the 40 km fiber cable. Therefore, the proposed method can provide new thinking to address the high positioning error at the end of the long-distance optical fiber cable.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125098601","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 compact and universal digital lock-in amplifier design for broad optical spectrum capturing 一个紧凑和通用的数字锁相放大器设计，用于广泛的光谱捕获

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2615555

Yunliang Li, Zheyi Yao, Zhiqiang Gao, Jiaming Qian, Heng Zhang, G. Gu, Qian Chen, Xiubao Sui, Lingyuan Meng

引用次数: 0

Noise model of the scale limitation in TDM interferometric fiber-optic sensor system TDM干涉型光纤传感器系统尺度限制的噪声模型

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2613923

Kun Cheng, Wentao Zhang, Wenzhu Huang

引用次数: 0