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Advanced Optoelectronics and Lasers最新文献

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High frequency light self-modulation and pulse transformations in running wave interferometers 行波干涉仪中的高频光自调制和脉冲变换
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793376
A. G. Lazarenko, A. Andreev, A. Kanaev
{"title":"High frequency light self-modulation and pulse transformations in running wave interferometers","authors":"A. G. Lazarenko, A. Andreev, A. Kanaev","doi":"10.1117/12.793376","DOIUrl":"https://doi.org/10.1117/12.793376","url":null,"abstract":"Coherent light self-modulation process was studied by modeling the running wave interferometers scheme containing beam splitting, delaying and amplifying. Principal possibilities of cw laser light modulation with GHz - THz frequencies and amplified pulses formation by cw pumping are shown. Some scheme parameters and input light features influences on said processes are illustrated and discussed. Pulse transformation in running wave interferometers (with and without amplification) was also studied by computer modeling. Pulse compression along with pulse form changes and specific pulsing generation with cw pump were found.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122755333","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
Photonic molecule modes in coupled spherical microcavities with CdTe nanocrystals CdTe纳米晶体耦合球形微腔中的光子分子模式
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793330
K. I. Rusakou, A. A. Gladyshchuk, S. Chugunov, Y. Rakovich, J. Donegan, A. Rogach, N. Gaponik
{"title":"Photonic molecule modes in coupled spherical microcavities with CdTe nanocrystals","authors":"K. I. Rusakou, A. A. Gladyshchuk, S. Chugunov, Y. Rakovich, J. Donegan, A. Rogach, N. Gaponik","doi":"10.1117/12.793330","DOIUrl":"https://doi.org/10.1117/12.793330","url":null,"abstract":"We present a detailed study of the localized coupled-cavity modes in a photonic molecule formed from two dielectric spherical microcavities with CdTe nanocrystals. A layer-by-layer deposition technique provides controllable coating of the microspheres with a shell of close-packed nanocrystals of approximately 4 nm in diameter. The observed spectral structures originate from the coupling of the electronic transitions in nanocrystals and the photon states of interacting microspheres and, in analogy to the formation of molecular electronic orbits, can be assigned to bonding and antibonding photon localized states.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"33 14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134224741","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
Magnetic field influence on MQW laser 磁场对MQW激光器的影响
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793302
A. F. Boya, A. I. Abdullah
{"title":"Magnetic field influence on MQW laser","authors":"A. F. Boya, A. I. Abdullah","doi":"10.1117/12.793302","DOIUrl":"https://doi.org/10.1117/12.793302","url":null,"abstract":"This paper represents the ability of Multiple Quantum Well (MQW) Laser for remote sensing by image processing of the laser beam cross sectional using the digital camera and personal computer. The magnetic field was applied on the MQW Laser in order to investigate the intensity of laser beam and the beam cross sectional. Analyses were pursued using Matlab package on the recorded images of the laser spot carried out using the digital camera. The results indicated that 20% increment in the intensity and 30% decrement in the cross sectional of the laser beam due to applied magnetic field of intensity 2.4 Tesla, in accordance with the original properties of the laser without magnetic field. These results could be properly used for remote sensing of the any sudden change in the environmental conditions of electrical high power stations and nuclear reactors.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133085061","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
Extraordinary enhanced absorptivity of gold surface ablated with femtosecond laser pulses 飞秒激光脉冲烧蚀金表面的非凡增强吸收率
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793443
A. Vorobyev, Chunlei Guo, V. Makin, N. G. Kokody, V. Kuzmichev
{"title":"Extraordinary enhanced absorptivity of gold surface ablated with femtosecond laser pulses","authors":"A. Vorobyev, Chunlei Guo, V. Makin, N. G. Kokody, V. Kuzmichev","doi":"10.1117/12.793443","DOIUrl":"https://doi.org/10.1117/12.793443","url":null,"abstract":"Surface relief topography and absorptivity enhancement due to surface structural modification induced by multi-pulse femtosecond laser ablation of a bulk gold sample are studied. It is shown that the enhancement of the absorptivity in multi-pulse ablation is caused by a combination of nano-, micro-, macro-structural surface modifications. Femtosecond laser-induced surface nanostructuring is found to be a significant factor enhancing the absorptivity. This absorptivity enhancement of the nano-structured surface is explained as a result of both multiple light reflections from produced ramified gold surface and resonant linear and nonlinear light absorption by coupled nanostructures (spheres, wires, cones).","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133209183","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
Stability of quasi-steady mode of electro-discharge XeCl lasers 放电XeCl激光器准稳态模式的稳定性
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793387
S. Anufrik, A. Volodenkov, K. Znosko
{"title":"Stability of quasi-steady mode of electro-discharge XeCl lasers","authors":"S. Anufrik, A. Volodenkov, K. Znosko","doi":"10.1117/12.793387","DOIUrl":"https://doi.org/10.1117/12.793387","url":null,"abstract":"The influence of gas mixing ratio on stability of quasi-steady mode of electro-discharge XeCl-lasers operation is discussed. The simplified model for electric-discharge XeCl-laser is presented. Although there are many reports on the models of XeCl-laser, for an analysis having clear physical sense it is useful to have a simplified kinetic model. The model enables to calculate an electrons concentration, density of excimer XeCl* molecules and specific energy deposition in active medium. The quasi-steady mode of discharge in XeCl-lasers is analyzed.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121692845","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
Ablation species generated by high power laser pulses from CdTe target 高功率激光脉冲对CdTe靶产生的烧蚀物质
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.795329
V. Savchuk, B. Kotlyarchuk, A. Zaginey, M. Oszwaldowski, J. Rzeszutek
{"title":"Ablation species generated by high power laser pulses from CdTe target","authors":"V. Savchuk, B. Kotlyarchuk, A. Zaginey, M. Oszwaldowski, J. Rzeszutek","doi":"10.1117/12.795329","DOIUrl":"https://doi.org/10.1117/12.795329","url":null,"abstract":"Investigations of parameters of the ablation specie produced by laser ablation from the CdTe targets were carried out. Optical emission spectroscopy and quadrupole mass spectroscopy methods were used for measurement of ablation species properties. Quantitative and qualitative parameters of ablation species were studied by optical emission spectroscopy. The dependences of the velocities of ablation components and they kinetic energies on the ablation parameters were established, as well. It was found that the ablation of CdTe targets by laser pulses with threshold power possessed a congruent character. In this case, analysis of mass-spectra of ablation species generated by high-power laser pulse shown that it was consisted only Cd and Te atoms, but with various degrees of ionization state. We established that parameters of ablation species have a strong the dependence on laser pulses regimes and parameters of background ambience.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121823774","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
Analysis of facet heating in semiconductor lasers 半导体激光器表面加热的分析
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793319
D. Wawer, T. Ochalski, K. Pierściński, M. Szymański, M. Bugajski, Ł. Piskorski, K. Gutowski, A. Kozłowska, A. Malag
{"title":"Analysis of facet heating in semiconductor lasers","authors":"D. Wawer, T. Ochalski, K. Pierściński, M. Szymański, M. Bugajski, Ł. Piskorski, K. Gutowski, A. Kozłowska, A. Malag","doi":"10.1117/12.793319","DOIUrl":"https://doi.org/10.1117/12.793319","url":null,"abstract":"High brightness, high power, semiconductor lasers have many potential applications such as: free space communications, printing, material processing, pumping etc [1]. Such applications require lasers, which are characterized by reliability and long lifetime. Catastrophic optical mirror damage (COMD) process is one of the major mechanisms, which drastically limits laser lifetime and emitted optical power [2]. Mirror degradation and eventually destruction of lasers is caused by facet heating due to nonradiative surface recombination of carriers. Facet heating reduces the band gap energy, consequently increasing the absorption coefficient at the facet. The absorbed light and photo-induced electron-hole pair are increased by the increase in the absorption coefficient. Both effects lead to further nonradiative recombination of carriers which induces heating and so on, up to degradation of mirror or even destruction of laser. We see that this effect is very undesirable and knowledge of the temperature dissipation on the surface is very important for improving semiconductor lasers design. In this work we present the analysis of temperature distribution at the front facet of the broad area GaAsP/AlGaAs lasers by means of micro-Thermoreflectance (μTR) Spectroscopy. Several methods proved to be useful in determining the temperature of the laser surface. These are micro-probe band-to-band photoluminescence, thermoreflectance spectroscopy and Raman spectroscopy [2, 3, 4, 5]. We have used μTR because it is contactless, non-destructive technique which enables us to obtain temperature distribution in real time.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114462650","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
Overview of optically driven antenna systems 光学驱动天线系统概述
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793861
P. Ritosa, B. Batagelj
{"title":"Overview of optically driven antenna systems","authors":"P. Ritosa, B. Batagelj","doi":"10.1117/12.793861","DOIUrl":"https://doi.org/10.1117/12.793861","url":null,"abstract":"In this paper, simple methods to obtain phase shifts and an amplitude regulation using electro-optical technique, with purpose to drive antenna array systems, are presented. This solution comprises true-time delay properties of the optics fiber, driven by tuneable lasers. In the following overview, several techniques proposed by different authors are presented. All methods are based on the same idea, which consists on setting the radiofrequency (RF) signal phase and amplitude in the optical domain instead of using radiofrequency techniques. Trough the electro-optical conversion the RF signal is transferred onto an optical carrier, where it can be influenced to achieve the desired result.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132868163","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
Modeling of a cavity configuration of the axially diode-pumped solid-state laser with consideration of a thermal lens in the active element 考虑有源元件热透镜的轴向二极管泵浦固体激光器腔体结构建模
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793393
E. N. Ofitserov
{"title":"Modeling of a cavity configuration of the axially diode-pumped solid-state laser with consideration of a thermal lens in the active element","authors":"E. N. Ofitserov","doi":"10.1117/12.793393","DOIUrl":"https://doi.org/10.1117/12.793393","url":null,"abstract":"The model of calculation of a cavity configuration of the axially diode pumped solid-state laser which considers nonlinear dependence thermo-optics distortions (a thermal lens) in the active element on the pumping power has been presented. Quantity (focal distance) of a thermal lens in the crystal has been determined by means of Hartmann method. Within the bounds of model the main spatial characteristics of the output laser radiation - the energy divergence angle and output beam diameter for two cases of cooling of the active element were determined. It is shown that experimental investigation of beam quality of the laser radiation is in correlation conformity with theoretical calculations.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132915880","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
Method of focusing laser beam based on analysis of spatial frequencies of surface image 基于表面图像空间频率分析的激光束聚焦方法
Advanced Optoelectronics and Lasers Pub Date : 2008-03-03 DOI: 10.1117/12.793396
M. Dzjubenko, S. Kolpakov, O. Priyomko, D. F. Kulishenko
{"title":"Method of focusing laser beam based on analysis of spatial frequencies of surface image","authors":"M. Dzjubenko, S. Kolpakov, O. Priyomko, D. F. Kulishenko","doi":"10.1117/12.793396","DOIUrl":"https://doi.org/10.1117/12.793396","url":null,"abstract":"The method of a focusing objective, spatial spectrum, based on the analysis, of images is circumscribed. The theoretical substantiation is shown it. Is shown, that for a surface of any object exists of one or several resonant spatial frequencies, which in a focal point have maximum intensity. It is connected to a method of formation of a roughness. Because of theories of stochastic and random oscillations, is asserted, that all actual rough surfaces are not absolute random in a sense of a theory of probabilities. Therefore, optical fields generated by these objects, too not random. The image in this case grows out interactions of a field with a screen. Such submission has allowed to use as the characteristic of an optical field correlation dimensionality of its spatial chaos. The conducted researches have allowed to combine process of precision guidance on a focal point of the technological laser with obtaining of a sharp image of a treated surface.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124974236","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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