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340 nm Bandwidth Automatic Dynamic Optical Equalizer for CWDM Networks 用于CWDM网络的340 nm带宽自动动态光均衡器
Advances in Optical Technologies Pub Date : 2013-10-23 DOI: 10.1155/2013/420140
S. Dupont, J. Kastelik, J. Gazalet
{"title":"340 nm Bandwidth Automatic Dynamic Optical Equalizer for CWDM Networks","authors":"S. Dupont, J. Kastelik, J. Gazalet","doi":"10.1155/2013/420140","DOIUrl":"https://doi.org/10.1155/2013/420140","url":null,"abstract":"This paper presents an automatic optical equalizer based on a pair of in-house developed high efficiency, acousto-optic variable optical attenuators (AO-VOAs). The system is polarization insensitive and presents a wide bandwidth compatible with coarse wavelength division multiplexing (CWDM) requirements: 340 nm. The system operation is automatic and bidirectional and equalization is obtained in one single iteration of algorithm loop.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116858024","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
Amplification Properties of Femtosecond Laser-Written Er3+/Yb3+ Doped Waveguides in a Tellurium-Zinc Glass 飞秒激光写入Er3+/Yb3+掺杂碲锌玻璃波导的放大特性
Advances in Optical Technologies Pub Date : 2013-09-12 DOI: 10.1155/2013/621018
M. Olivero, D. L. D. Silva, L. Kassab, A. Gomes
{"title":"Amplification Properties of Femtosecond Laser-Written Er3+/Yb3+ Doped Waveguides in a Tellurium-Zinc Glass","authors":"M. Olivero, D. L. D. Silva, L. Kassab, A. Gomes","doi":"10.1155/2013/621018","DOIUrl":"https://doi.org/10.1155/2013/621018","url":null,"abstract":"We report on the fabrication and characterization of active waveguides in a TeO2-ZnO glass sample doped with Er3","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123483935","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: 5
Effect of Temperature on Photonic Band Gaps in Semiconductor-Based One-Dimensional Photonic Crystal 温度对半导体基一维光子晶体光子带隙的影响
Advances in Optical Technologies Pub Date : 2013-08-29 DOI: 10.1155/2013/798087
J. Malik, K. Jindal, Vinay Kumar, Vipin Kumar, Arun Kumar, Kh. S. Singh, T. Singh
{"title":"Effect of Temperature on Photonic Band Gaps in Semiconductor-Based One-Dimensional Photonic Crystal","authors":"J. Malik, K. Jindal, Vinay Kumar, Vipin Kumar, Arun Kumar, Kh. S. Singh, T. Singh","doi":"10.1155/2013/798087","DOIUrl":"https://doi.org/10.1155/2013/798087","url":null,"abstract":"The effect of the temperature and angle of incidence on the photonic band gap (PBG) for semiconductor-based photonic crystals has been investigated. The refractive index of semiconductor layers is taken as a function of temperature and wavelength. Three structures have been analyzed by choosing a semiconductor material for one of the two materials in a bilayer structure. The semiconductor material is taken to be ZnS, Si, and Ge with air in first, second, and third structures respectively. The shifting of band gaps with temperature is more pronounced in the third structure than in the first two structures because the change in the refractive index of Ge layers with temperature is more than the change of refractive index of both ZnS and Si layers with temperature. The propagation characteristics of the proposed structures are analyzed by transfer matrix method.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123385482","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: 8
Far-field Diffraction Properties of Annular Walsh Filters 环形沃尔什滤波器的远场衍射特性
Advances in Optical Technologies Pub Date : 2013-07-24 DOI: 10.1155/2013/360450
P. Mukherjee, L. Hazra
{"title":"Far-field Diffraction Properties of Annular Walsh Filters","authors":"P. Mukherjee, L. Hazra","doi":"10.1155/2013/360450","DOIUrl":"https://doi.org/10.1155/2013/360450","url":null,"abstract":"Annular Walsh filters are derived from the rotationally symmetric annular Walsh functions which form a complete set of orthogonal functions that take on values either","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115426339","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: 15
A Resource Reservation Protocol with Linear Traffic Prediction for OBS Networks 基于线性流量预测的OBS网络资源预留协议
Advances in Optical Technologies Pub Date : 2013-07-15 DOI: 10.1155/2013/425372
I. Karamitsos, C. Bowerman
{"title":"A Resource Reservation Protocol with Linear Traffic Prediction for OBS Networks","authors":"I. Karamitsos, C. Bowerman","doi":"10.1155/2013/425372","DOIUrl":"https://doi.org/10.1155/2013/425372","url":null,"abstract":"This paper addresses the issue of providing resource reservation mechanism for OBS networks. We propose a linear prediction mechanism based on least mean square (LMS) method to reduce the burst delay at edge nodes. A reservation method is proposed to increase the reservation probability and to improve the delay reduction performance.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124263530","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: 4
Splice Loss of Graded-Index Fibers: Accurate Semianalytical Descriptions Using Nelder-Mead Nonlinear Unconstrained Optimization with Three-Parameter Fundamental Modal Field 梯度折射率光纤的剪接损耗:基于三参数基本模态场的Nelder-Mead非线性无约束优化的精确半解析描述
Advances in Optical Technologies Pub Date : 2013-07-08 DOI: 10.1155/2013/168923
R. Choudhury, Arundhati Roy Choudhury, M. Ghose
{"title":"Splice Loss of Graded-Index Fibers: Accurate Semianalytical Descriptions Using Nelder-Mead Nonlinear Unconstrained Optimization with Three-Parameter Fundamental Modal Field","authors":"R. Choudhury, Arundhati Roy Choudhury, M. Ghose","doi":"10.1155/2013/168923","DOIUrl":"https://doi.org/10.1155/2013/168923","url":null,"abstract":"A faster and accurate semianalytical formulation with a robust optimization solution for estimating the splice loss of graded-index fibers has been proposed. The semianalytical optimization of modal parameters has been carried out by Nelder-Mead method of nonlinear unconstrained minimization suitable for functions which are uncertain, noisy, or even discontinuous. Instead of normally used Gaussian function, as the trial field for the fundamental mode of graded-index optical fiber a novel sinc function with exponentially and ( is the normalized radius of the optical fiber) decaying trailing edge has been used. Due to inclusion of three parameters in the optimization of fundamental modal solution and application of an efficient optimization technique with simple analytical expressions for various modal parameters, the results are found to be accurate and computationally easier to find than the standard numerical method solution.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131553530","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
Experiments on the Porch Swing Bearing of Michelson Interferometer for Low Resolution FTIR 低分辨率FTIR迈克尔逊干涉仪门廊摆动轴承实验
Advances in Optical Technologies Pub Date : 2013-05-30 DOI: 10.1155/2013/948638
Tuomas Välikylä, J. Kauppinen
{"title":"Experiments on the Porch Swing Bearing of Michelson Interferometer for Low Resolution FTIR","authors":"Tuomas Välikylä, J. Kauppinen","doi":"10.1155/2013/948638","DOIUrl":"https://doi.org/10.1155/2013/948638","url":null,"abstract":"Porch swing bearing for the linear motion of the mirror in Michelson interferometer for mid-infrared low resolution Fourier transform spectrometer was studied experimentally using the modulation depth of the collimated laser beam. The mirror tilting was measured to be lower than 5 μrad over 3 mm mirror travel using two different bearings assemblies. Additionally, the manufacturing tolerances of the bearing type were proved to be loose enough not to limit the interferometer application. These demonstrate that the porch swing without any adjustment mechanisms provides the sufficient motion linearity.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"66 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131308031","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
Detection of Nitroaromatic and Peroxide Explosives in Air Using Infrared Spectroscopy: QCL and FTIR 红外光谱法检测空气中硝基芳香族和过氧化物炸药:QCL和FTIR
Advances in Optical Technologies Pub Date : 2013-05-07 DOI: 10.1155/2013/532670
L. Pacheco‐Londoño, J. Castro-Suarez, S. Hernández‐Rivera
{"title":"Detection of Nitroaromatic and Peroxide Explosives in Air Using Infrared Spectroscopy: QCL and FTIR","authors":"L. Pacheco‐Londoño, J. Castro-Suarez, S. Hernández‐Rivera","doi":"10.1155/2013/532670","DOIUrl":"https://doi.org/10.1155/2013/532670","url":null,"abstract":"A methodology for processing spectroscopic information using a chemometrics-based analysis was designed and implemented in the detection of highly energetic materials (HEMs) in the gas phase at trace levels. The presence of the nitroaromatic HEM 2,4-dinitrotoluene (2,4-DNT) and the cyclic organic peroxide triacetone triperoxide (TATP) in air was detected by chemometrics-enhanced vibrational spectroscopy. Several infrared experimental setups were tested using traditional heated sources (globar), modulated and nonmodulated FT-IR, and quantum cascade laser- (QCL-) based dispersive IR spectroscopy. The data obtained from the gas phase absorption experiments in the midinfrared (MIR) region were used for building the chemometrics models. Partial least-squares discriminant analysis (PLS-DA) was used to generate pattern recognition schemes for trace amounts of explosives in air. The QCL-based methodology exhibited a better capacity of discrimination for the detected presence of HEM in air compared to other methodologies.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130710125","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: 21
Optical System for Bispectral Imaging in Mid-IR at 1000 Frames per Second 每秒1000帧的中红外双光谱成像光学系统
Advances in Optical Technologies Pub Date : 2013-03-13 DOI: 10.1155/2013/905870
M. Strojnik, G. Páez
{"title":"Optical System for Bispectral Imaging in Mid-IR at 1000 Frames per Second","authors":"M. Strojnik, G. Páez","doi":"10.1155/2013/905870","DOIUrl":"https://doi.org/10.1155/2013/905870","url":null,"abstract":"We propose, evaluate, and demonstrate the performance of an IR/optical double-image experimental setup where we capture two simultaneous images of a single object, in two different spectral bands, using a single detector array. With this arrangement, we may observe rapidly changing phenomena, at a rate of more than 1000 frames per second, without the loss of the spatial information about the test subject. We describe the optical system to perform simultaneous imaging in IR for slightly inclined optical axes. We verify the actual performance by applying the experimental method to flame analysis in the mid-IR to determine the combustion efficiency.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125045120","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: 3
Advanced Infrared Technology and Applications 先进红外技术与应用
Advances in Optical Technologies Pub Date : 2013-03-13 DOI: 10.1155/2013/459074
O. Salvetti, L. Ronchi, C. Corsi, A. Rogalski, M. Strojnik
{"title":"Advanced Infrared Technology and Applications","authors":"O. Salvetti, L. Ronchi, C. Corsi, A. Rogalski, M. Strojnik","doi":"10.1155/2013/459074","DOIUrl":"https://doi.org/10.1155/2013/459074","url":null,"abstract":"","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117324760","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
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