International Conference on Optical Instruments and Technology最新文献_第3页

A TDLAS gas sensor using tunable DFB laser array 一种采用可调谐DFB激光阵列的TDLAS气体传感器

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616199

Zijun Liu, Siyuan Chen, Xiangfei Chen, Feng Wang, Tao Fang, Hua Tong

引用次数: 0

High-power DFB semiconductor laser array 大功率DFB半导体激光器阵列

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620155

Yue-chun Shi, Yuxin Ma, Ziming Hong, Rulei Xiao, Xin Wang, Xianfei Chen

引用次数: 0

Simulation of spectral confocal microscopy system 光谱共聚焦显微系统的仿真

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616488

Haiqiang Li, J. Zhang, Zhe Chen, Jinfeng Wang

{"title":"Simulation of spectral confocal microscopy system","authors":"Haiqiang Li, J. Zhang, Zhe Chen, Jinfeng Wang","doi":"10.1117/12.2616488","DOIUrl":"https://doi.org/10.1117/12.2616488","url":null,"abstract":"As a kind of non-contact displacement sensor modulated by wavelength, spectral confocal microscopy system has high measurement accuracy and is insensitive to object tilt and surface texture, and has strong anti-stray light ability, which makes it become a hotspot of current research. The traditional spectral confocal microscopy system uses a wide-spectrum light source to illuminate the pinhole and dispersion objective lens to generate dispersion on one side of the measured object. The dispersion objective lens focuses the light of different wavelengths at different positions of the optical axis, converts the displacement information into wavelength information, and detects the reflected spectral information by CCD industrial camera or spectrometer to determine the peak wavelength of the focused light on the object surface, Thus, the axial distance information of the object surface to be measured is obtained. In this paper, based on the analysis of the traditional confocal microscopic system, a linear dispersion objective lens of the confocal microscopic system was designed. The axial dispersion of 3.228mm was achieved in the wavelength range of 450nm to 650nm, and the linear determination coefficient between axial dispersion and wavelength was greater than R2=0.9859.On this basis, a dual-optical path detection structure based on edge light is designed. By adding three impurity filters to filter stray light except the target wavelength, the results show that the new spectral confocal light path has high sensitivity, small stray light and strong anti-interference ability.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"26 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":"133482131","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

Unsupervised-learning neural network for fiber nonlinearity compensation 光纤非线性补偿的无监督学习神经网络

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616544

Pinjing He, Feilong Wu, Meng Yang, Aiying Yang, Peng Guo, Yaojun Qiao, Xiangjun Xin

引用次数: 0

Range enhancement of the dynamic frequency measurement in phase-sensitive OTDR with a symmetric fiber interferometer 对称光纤干涉仪对相敏OTDR动态频率测量范围的增强

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616395

Zhenshi Sun, Kun Liu, Junfeng Jiang, Kang Xue, Yuelang Huang, Tiegen Liu

{"title":"Range enhancement of the dynamic frequency measurement in phase-sensitive OTDR with a symmetric fiber interferometer","authors":"Zhenshi Sun, Kun Liu, Junfeng Jiang, Kang Xue, Yuelang Huang, Tiegen Liu","doi":"10.1117/12.2616395","DOIUrl":"https://doi.org/10.1117/12.2616395","url":null,"abstract":"The key technology for expanding the scope of application fields for the phase-sensitive optical time domain based reflectometer (Φ-OTDR) is to accurately demodulate the vibration position with a wide frequency range. Unfortunately, due to the restriction of the traveling time of the modulated pulse, it is very difficult to obtain the low frequency response with a high signal to noise ratio (SNR) and to achieve a higher detectable frequency response in the Φ-OTDR. In this paper, a scheme based on dual-wavelength probes is proposed and demonstrated to enhance the dynamic frequency range with a high SNR in the Φ-OTDR based distributed optical fiber vibration sensing system. Utilizing the small difference between the central wavelengths of the two laser sources, the location and the frequency information can be simultaneously obtained by the reflectometer and a symmetric based interferometer. In addition, to further improve the SNR of the demodulated vibration spectrum and to suppress the high-order harmonic effect induced by the piezoelectric transducer, an enhanced phase generated carrier demodulation algorithm is employed in the proposed scheme. In experiments, the proposed sensing scheme showed better performance compared to previous studies. Foreseeably, the proposed sensing scheme will greatly extend the sensing scope for the Φ-OTDR based system where a wide frequency response is required.","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":"117171499","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 microwave generation based on semiconductor laser and its applications 基于半导体激光器的光子微波产生及其应用

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2619469

G. Xia, X. Lin, L. Fan

引用次数: 1

Pattern recognition using multi-dimensional hybrid feature extraction scheme in optical fiber distributed vibration sensing system 基于多维混合特征提取方案的光纤分布式振动传感系统模式识别

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616437

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

{"title":"Pattern recognition using multi-dimensional hybrid feature extraction scheme in optical fiber distributed vibration sensing system","authors":"Kang Xue, Kun Liu, Junfeng Jiang, Zhenshi Sun, Yuelang Huang, Sichen Li, Xibo Jin, Tiegen Liu","doi":"10.1117/12.2616437","DOIUrl":"https://doi.org/10.1117/12.2616437","url":null,"abstract":"A multi-dimensional hybrid feature extraction scheme for optical fiber distributed vibration sensing system has been proposed in this work. Firstly, the hybrid features are extracted through using zero-crossing rate, wavelet packet energy entropy, empirical mode decomposition based kurtosis, skewness and multiscale permutation entropy. Secondly, an effective feature vector are built based on all the above-mentioned features. Finally, the established features are classified and recognized by a radial basis foundation neural network. A series of experiments have been implemented to validate the effectiveness of the proposed scheme. Results show that the proposed scheme can efficiently and accurately identify five common sensing patterns. Specifically, the average recognition accuracy of 99.2 % is achieved and the response time can be limited less than 1 s. Therefore, it is believed that the proposed pattern recognition scheme has a good potential in the application of the optical fiber distributed vibration sensing system.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"85 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":"115830577","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

The performance research of ADMIN detection algorithm for MDL-impaired mode division multiplexing fiber transmission mdl损伤模分复用光纤传输中ADMIN检测算法的性能研究

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620938

Fengju Fan, Jianyong Zhang

引用次数: 0

A fast endpoint detection algorithm for dual Mach-Zehnder interferometer vibration sensing system 双马赫-曾德尔干涉仪振动传感系统的快速端点检测算法

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616436

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

引用次数: 0

Detection of Hg2+ concentration based on DNA modified LPFG 基于DNA修饰LPFG的Hg2+浓度检测

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616508

Ronghao Zhang, Xiaoyang Lei

{"title":"Detection of Hg2+ concentration based on DNA modified LPFG","authors":"Ronghao Zhang, Xiaoyang Lei","doi":"10.1117/12.2616508","DOIUrl":"https://doi.org/10.1117/12.2616508","url":null,"abstract":"A DNA modified long period fiber grating (LPFG) was proposed and fabricated for measurement of mercury ion (Hg2+) concentration. The T-T base pair of Hg2+ and DNA can specifically bind to form T-Hg2+-T complex, which leads to the transition of DNA from irregular free helix conformation to hairpin structure, thereby changing the refractive index of the fiber surface. Firstly, the DNA sequence and coating methods were analyzed and optimized, and the sensing mechanism and phase matching conditions of LPFG were analyzed by using Rsoft. The simulation results showed that reducing the cladding diameter and period could increase the refractive index sensitivity, and changing the length of the gate region would not affect the sensitivity. Besides, the LPFG at the phase matching turning point had higher sensitivity. Then, a CO2 laser was used to prepare LPFG with a period of 250 μm, and the DNA was fixed on the surface of the grating by electrostatic adsorption with using Poly-L-lysine as the polycation molecule. The results of Hg2+ detection experiments showed that when the concentration of Hg2+ increased from 6 μM to 18 μM, the resonance wavelength at the trough shifted from 1623.8 nm to 1627.37 nm. There was a linear relationship in the range of 6~12 μM with sensitivity of 0.505 nm/μM. In conclusion, the proposed Hg2+ sensor based on DNA modified LPFG structure behaves the advantages of simple production, low cost, and high specificity, which has great potential in the actual environment.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"34 Suppl 4 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":"116600233","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