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5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.最新文献

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Neural models for the active microwave devices 有源微波器件的神经网络模型
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246151
B. Karlik
{"title":"Neural models for the active microwave devices","authors":"B. Karlik","doi":"10.1109/LFNM.2003.1246151","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246151","url":null,"abstract":"Artificial neural networks are emerging as a powerful technology for RF and microwave characterization, modeling, and design. Neuron modeler is the first software in the industry that embraces this technology with complete RF and microwave orientation. It helps you to immediately start developing neural models for RF/microwave components and circuits and helps to provide neural models for your simulators. The device is modeled by a black box whose small signal and noise parameters are evaluated through a neural network, based upon the fitting of both of these parameters for the multiple bias or configuration. In this study, two types of neural network were compared for the existing device modeling technique. The concurrent modeling procedure does not require solving device physics equations repeatedly during optimization.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131353368","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
Photothermal method of measurement of the heat conduction 测量热传导的光热方法
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246132
O. Mokryy
{"title":"Photothermal method of measurement of the heat conduction","authors":"O. Mokryy","doi":"10.1109/LFNM.2003.1246132","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246132","url":null,"abstract":"The photothermal method of heat conduction measurement is presented. Light impulse is used for sample excitation. Light energy is absorbed and is used for sample heating. This heating results in a temperature change. The thermal gradients result in heat transport. The acoustic wave velocity for accurate measurements of the temperature changes is used in this method. A case of linear dependence between temperature and acoustic wave velocity is considered. Acoustic wave is generated and detected by piezoelectric transducer. Measurements of acoustic wave velocity are made during the temperature relaxation time. The received data are used for calculation of heat conduction of a sample. The measurements were carried out by pulse method. The acoustic waves of ultrasonic frequency were used. The different converters measure the velocity of an acoustic wave in different places of the sample. Change distribution temperature of the sample corresponds accordingly heat conduction. The measurement of temperature allows to define heat conduction. The numerical modeling was used for the analysis of this method.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122205760","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
Complexity of optical pulses in modulated medium 调制介质中光脉冲的复杂性
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246094
N. Ruzhytska, A. Nerukh, D. Nerukh
{"title":"Complexity of optical pulses in modulated medium","authors":"N. Ruzhytska, A. Nerukh, D. Nerukh","doi":"10.1109/LFNM.2003.1246094","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246094","url":null,"abstract":"The model of transformation of optical pulses in modulated medium is considered. The medium modulation is in the form of rectangular cycles, the magnitudes and durations of which do not have any restrictions. Influence of modulation parameters on the complexity of a transformed electromagnetic signal is investigated. The complexity calculation is done in the framework of Crutchfield's 'computational mechanics' approach.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121291819","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
Validity of the effective index model for analysis of photonic crystal fibers 光子晶体光纤有效折射率分析模型的有效性
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246119
P. Ivanov, A.V. Kublik, I. Guryev, A.V. Dyogtyev, S. Petrov
{"title":"Validity of the effective index model for analysis of photonic crystal fibers","authors":"P. Ivanov, A.V. Kublik, I. Guryev, A.V. Dyogtyev, S. Petrov","doi":"10.1109/LFNM.2003.1246119","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246119","url":null,"abstract":"Our present paper focuses on the investigation of analysis of the effective-index photonic crystal fiber (PCF) using the step-index optical fiber approach. Thus, the aim of the work is the definition of the effective radius of the PCF core region which provides an equivalent description of the transverse waveguiding modes of real PCF with step-index approach. The effective-index holey fiber and its step-index fiber analog are also considered.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"247 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115964812","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: 2
Photonic junction based on dark spatial solitons 基于暗空间孤子的光子结
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246122
M. Torres-Cisneros, M. Meneses-Nava, J. Haus, Y. Shmaliy, J. Sánchez-Mondragón, L. Aguilera-Cortés, R. Guzmán-Cabrera, M. Trejo
{"title":"Photonic junction based on dark spatial solitons","authors":"M. Torres-Cisneros, M. Meneses-Nava, J. Haus, Y. Shmaliy, J. Sánchez-Mondragón, L. Aguilera-Cortés, R. Guzmán-Cabrera, M. Trejo","doi":"10.1109/LFNM.2003.1246122","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246122","url":null,"abstract":"We present a fundamental study on the capability of a crossing of two optical waveguides based on dark-spatial solitons to act as a controllable optical beam splitter. Our study is based on the fact that the guided beam is diffracted at the waveguide crossing by an effective phase screen formed by the soliton collision profile. We find that when each dark soliton is immersed into its own bright background, the corresponding optical junction can not operate. This is because the finite width of the backgrounds acts as a low-pass filter over the diffracted beam, and because the onset of the cross-phase modulation instability effect occurs for small enough collision angles.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122684380","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 comparative simulation of the Q-switched Nd:YAG and Yb:YAG microchip lasers 调q Nd:YAG和Yb:YAG微芯片激光器的比较仿真
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246084
O. Buryy, S.B. Ubiszkii, S. Melnyk, A. Matkovskii
{"title":"The comparative simulation of the Q-switched Nd:YAG and Yb:YAG microchip lasers","authors":"O. Buryy, S.B. Ubiszkii, S. Melnyk, A. Matkovskii","doi":"10.1109/LFNM.2003.1246084","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246084","url":null,"abstract":"In this paper a comparison between microchip lasers based on Nd:YAG and Yb:YAG-generating media by means of the optimization problem solving is done. Such an approach allows to estimate theoretically the highest possible values of the laser irradiation parameters, particularly, the energy E in the laser pulse. This investigation is stipulated by such properties of the Yb/sup 3+/doped medium, as smaller, ir comparison with traditional Nd:YAG, Stox losses (24% for Nd:YAG and 9% for Yb:YAG laser), a low thermal load, a wider absorption band in the pumping region, a higher lifetime of the upper laser level, an absence of the concentration extinguishing and, consequently, the possibility of the ytterbium concentration increase.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128380979","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
Waveguide submillimeter laser with mode selector 带模式选择器的波导亚毫米激光器
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246075
O. Gurin, A. Degtyarev, V. Maslov, V. Svich, V. Tkachenko, A. N. Topkov
{"title":"Waveguide submillimeter laser with mode selector","authors":"O. Gurin, A. Degtyarev, V. Maslov, V. Svich, V. Tkachenko, A. N. Topkov","doi":"10.1109/LFNM.2003.1246075","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246075","url":null,"abstract":"The purpose of the given work is study of SMM OPL with the offered transversal mode selector. The availability of a quasioptical waveguide cavity with the offered transversal mode selector is demonstrated for the creation wide-range small-sized SMM optically pumped lasers. The control of the selector diaphragm diameter is executed without the disturbance of the laser action in any line of oscillation. At that no more than two lower modes remain over the threshold of oscillation. Due to small width of the gain line of SMM laser the single-mode action can be reached, as a rule, by tuning a cavity. The effective high mode suppression is obtained as well in the case of several cavity modes occur within of the gain contour simultaneously.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114651619","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
Second order optical nonlinearity of proton exchanged lithium niobate and lithium tantalate waveguides 质子交换铌酸锂和钽酸锂波导的二阶光学非线性
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246089
Y. Korkishko, V. Fedorov, S. Kostritskii, A.N. Alkaev, E.I. Maslennikov, F. Laurell
{"title":"Second order optical nonlinearity of proton exchanged lithium niobate and lithium tantalate waveguides","authors":"Y. Korkishko, V. Fedorov, S. Kostritskii, A.N. Alkaev, E.I. Maslennikov, F. Laurell","doi":"10.1109/LFNM.2003.1246089","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246089","url":null,"abstract":"This paper presents the influence of the phase state of proton exchanged (PE) LiNbO/sub 3/ and LiTaO/sub 3/ waveguides on the second-order optical nonlinearity by using reflected second harmonic generation (SHG) measurements from the polished waveguide end face in different H/sub x/Li/sub 1-x/NbO/sub 3/ and H/sub x/Li/sub 1-x/TaO/sub 3/ phases: as-exchanged and annealed proton-exchanged (APE) waveguides, high-temperature proton-exchanged (HTPE) waveguides, as well as reverse proton exchanged (RPE) waveguides, and proton exchanged waveguides in stoichiometric and MgO-doped LiNbO/sub 3/ crystals.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114367202","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
Analytical techniques for designing spot generating holograms 点生成全息图设计的分析技术
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246141
A. Georgiou
{"title":"Analytical techniques for designing spot generating holograms","authors":"A. Georgiou","doi":"10.1109/LFNM.2003.1246141","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246141","url":null,"abstract":"Summary form only given. Phase holograms can, in principle, route light with zero photon loss. In the future, this property of them is likely to be utilized for applications such as free space interconnects and video projection systems. In some of these applications it is necessary to create an array of spots on the replay field. Currently, spot generating holograms are evaluated using computational demanding algorithms like simulated annealing (SA) and error diffusion. These algorithms are so complex and time consuming that it is impossible to evaluate the required hologram in real time. In this paper we present a completely analytical method for evaluating spot generating holograms. The proposed method is much faster and simpler than the SA algorithm while having the same diffraction efficiency. Holograms created using the analytical method are identical with the ones obtained using SA. In terms of computational demand, the phase profile is evaluated in a fraction of a second and this time does not scale up with increasing number of pixels and phase levels.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125524056","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
Investigation of negative dispersion extrema in chirping mirrors of arbitrary order of chirping 任意阶啁啾反射镜负色散极值的研究
5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI: 10.1109/LFNM.2003.1246137
V. Lysak, I. Sukhoivanov, S.O. Yakushev
{"title":"Investigation of negative dispersion extrema in chirping mirrors of arbitrary order of chirping","authors":"V. Lysak, I. Sukhoivanov, S.O. Yakushev","doi":"10.1109/LFNM.2003.1246137","DOIUrl":"https://doi.org/10.1109/LFNM.2003.1246137","url":null,"abstract":"Results of the numerical computation of the chirped mirrors with an arbitrary order of the chirping are presented. The transfer matrix method is used with taking the width and the refraction index of each layer into account. The obtained data show the strong negative group delay dispersion dependence on the parameters of the chirping and a number of layers in the structure. It is shown, the structure with changing of the low refractive index layer thickness has the largest negative group delay dispersion. The negative group delay dispersion (GDD) in the chirped mirrors has a great importance for development of the laser pulses generation technology with the pulse duration in several femtoseconds. It allows using the chirped mirrors without additional prisms. The application of the chirped mirrors is advantageous for the compression of the high energy pulses as well because its gives high negative GDD in the small material volume and in the direction of the pulse propagation. In this case the nonlinear affects during pulse compression can vanish.","PeriodicalId":368970,"journal":{"name":"5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133874254","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
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