Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634278
G. S. McDonald, J. Christian, T. Hodgkinson
The slowly varying envelope approximation and the ensuing Galilean boost to a local time frame are near-universal features of conventional scalar pulse models. Here, we will give an overview of our recent progress with a new approach to nonlinear pulse modelling, which is based on a Helmholtz-type formalism.
{"title":"Optical soliton pulses with relativistic characteristics","authors":"G. S. McDonald, J. Christian, T. Hodgkinson","doi":"10.1109/CAOL.2010.5634278","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634278","url":null,"abstract":"The slowly varying envelope approximation and the ensuing Galilean boost to a local time frame are near-universal features of conventional scalar pulse models. Here, we will give an overview of our recent progress with a new approach to nonlinear pulse modelling, which is based on a Helmholtz-type formalism.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114578765","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634266
V. Niziev
Several problems are considered in this review. Using our dipole wave theory of diffraction the analytical formulas for diffraction from a narrow ring for different polarization were obtained. They were used in the new wave numerical model of an open resonator. A number of parameters of mode formation were investigated. It was shown that multipass geometrical “modes” win in competition with single pass Laguerre-Gaussian (LG) non-main modes during the relaxation oscillations. A method has been suggested for description of the azimuthally (A) and radially (R) polarized modes that excludes any inherent contradictions and unjustified approximations. It allows the analytical calculation of the field components for these modes, including the longitudinal one. Generation of high power beams with axial symmetric polarization in stable resonator of industrial CO2-laser with diffraction gratings has been realized. The transformation of azimuthally polarized mode to R-polarized mode was demonstrated. R-polarized beam was successfully used for cutting metal. The principal scheme based on a modified Sagnac interferometer was proposed and investigated experimentally. This external cavity technique was used for generation of R- and A-polarized laser beam.
{"title":"Selected fundamental and applied problems of laser mode formation","authors":"V. Niziev","doi":"10.1109/CAOL.2010.5634266","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634266","url":null,"abstract":"Several problems are considered in this review. Using our dipole wave theory of diffraction the analytical formulas for diffraction from a narrow ring for different polarization were obtained. They were used in the new wave numerical model of an open resonator. A number of parameters of mode formation were investigated. It was shown that multipass geometrical “modes” win in competition with single pass Laguerre-Gaussian (LG) non-main modes during the relaxation oscillations. A method has been suggested for description of the azimuthally (A) and radially (R) polarized modes that excludes any inherent contradictions and unjustified approximations. It allows the analytical calculation of the field components for these modes, including the longitudinal one. Generation of high power beams with axial symmetric polarization in stable resonator of industrial CO2-laser with diffraction gratings has been realized. The transformation of azimuthally polarized mode to R-polarized mode was demonstrated. R-polarized beam was successfully used for cutting metal. The principal scheme based on a modified Sagnac interferometer was proposed and investigated experimentally. This external cavity technique was used for generation of R- and A-polarized laser beam.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127143794","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634257
A. Chipouline, J. Petschulat, C. Menzel, C. Rockstuhl, T. Pertsch, F. Lederer
Homogenization of optical metamaterials is one of the fundamental problems of electrodynamics of composite materials. Here the homogenization approach using multipole expansion is analysed and compared with the phenomenological one. Applications of the developed model for different structures and various phenomena are presented.
{"title":"Multipole model for metamaterial homogenization","authors":"A. Chipouline, J. Petschulat, C. Menzel, C. Rockstuhl, T. Pertsch, F. Lederer","doi":"10.1109/CAOL.2010.5634257","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634257","url":null,"abstract":"Homogenization of optical metamaterials is one of the fundamental problems of electrodynamics of composite materials. Here the homogenization approach using multipole expansion is analysed and compared with the phenomenological one. Applications of the developed model for different structures and various phenomena are presented.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127171447","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634255
A. Desyatnikov
Spiraling of laser beams in nonlinear media is one of the manifestations of optical orbital angular momentum (OAM). We explore unusual dynamics of spiraling spatial solitons, including stabilization of azimuthons and quasi-periodic transformations of nonlocal solitons, as well as contribution of OAM towards suppression of catastrophic self-focusing, or collapse, in Kerr media.
{"title":"Nonlinear dynamics of spiraling laser beams","authors":"A. Desyatnikov","doi":"10.1109/CAOL.2010.5634255","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634255","url":null,"abstract":"Spiraling of laser beams in nonlinear media is one of the manifestations of optical orbital angular momentum (OAM). We explore unusual dynamics of spiraling spatial solitons, including stabilization of azimuthons and quasi-periodic transformations of nonlocal solitons, as well as contribution of OAM towards suppression of catastrophic self-focusing, or collapse, in Kerr media.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128145603","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634253
A. Ferrando, M. Garcia-March
We show the existence of external forces acting on phase singularities whose origin can be attributed to the presence of short-term discrete-symmetry potentials. These special forces can break highly charged phase singularities into single-charged ones and provide them with non-zero orbital angular momentum even when the potential no longer acts.
{"title":"Symmetry-induced forces on phase singularities","authors":"A. Ferrando, M. Garcia-March","doi":"10.1109/CAOL.2010.5634253","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634253","url":null,"abstract":"We show the existence of external forces acting on phase singularities whose origin can be attributed to the presence of short-term discrete-symmetry potentials. These special forces can break highly charged phase singularities into single-charged ones and provide them with non-zero orbital angular momentum even when the potential no longer acts.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125660037","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634224
O. Belous, A. Fisun, V.L. Pasynin
Impact of a diffraction grating on the spectrum of disc and microdisc resonator has been studied using FTDT method. Conditions of the single-mode excitation of whispering gallery mode of disc resonator was estimated.
{"title":"Disc and microdisc resonators with strip-like diffraction gratings","authors":"O. Belous, A. Fisun, V.L. Pasynin","doi":"10.1109/CAOL.2010.5634224","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634224","url":null,"abstract":"Impact of a diffraction grating on the spectrum of disc and microdisc resonator has been studied using FTDT method. Conditions of the single-mode excitation of whispering gallery mode of disc resonator was estimated.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"118 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131913327","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634245
E. Brasselet
Liquid crystals can self-assemble into various phases characterized by well-defined orientational ordering of their crystalline axis. Exception may happen at locations in space where the orientation is ill-defined, which correspond to liquid crystal defects. In addition, liquid crystals are well-known to be sensitive to external fields and light is no exception. In particular, Gaussian light beams can generate singular liquid crystal reorientation defects owing to the giant optical orientational nonlinearities. Such a singular optical reordering of liquid crystals can be used to generate light beams carrying on-axis phase singularity that are usually called optical vortices.
{"title":"Liquid crystal defects: Nonlinear optics and optical vortices","authors":"E. Brasselet","doi":"10.1109/CAOL.2010.5634245","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634245","url":null,"abstract":"Liquid crystals can self-assemble into various phases characterized by well-defined orientational ordering of their crystalline axis. Exception may happen at locations in space where the orientation is ill-defined, which correspond to liquid crystal defects. In addition, liquid crystals are well-known to be sensitive to external fields and light is no exception. In particular, Gaussian light beams can generate singular liquid crystal reorientation defects owing to the giant optical orientational nonlinearities. Such a singular optical reordering of liquid crystals can be used to generate light beams carrying on-axis phase singularity that are usually called optical vortices.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130358675","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634233
V. P. Yashchuk, O. Prygodiuk
Lasing properties of dyed random media under different excited region size and the medium thickness were investigated. Random lasing threshold, spectrum wavelength and intensity are appreciably dependent both on the excited region size and the medium thickness. It proves both lengthwise and crosswise spatial confinement of random lasing.
{"title":"Space confinement of random lasing","authors":"V. P. Yashchuk, O. Prygodiuk","doi":"10.1109/CAOL.2010.5634233","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634233","url":null,"abstract":"Lasing properties of dyed random media under different excited region size and the medium thickness were investigated. Random lasing threshold, spectrum wavelength and intensity are appreciably dependent both on the excited region size and the medium thickness. It proves both lengthwise and crosswise spatial confinement of random lasing.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130302762","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634237
M. Ubeid, M. Shabat
We prove the law of conservation of energy for propagation of electromagnetic waves through a multilayered structure consisting of LHM and dielectric slabs inserted in vacuum. Numerical method is presented to calculate the reflected and transmitted powers of the structure. The obtained results satisfy the law of conservation of energy.
{"title":"A theorem for the propagation of electromagnetic waves through a multilayered structure consisting of left handed material and dielectric","authors":"M. Ubeid, M. Shabat","doi":"10.1109/CAOL.2010.5634237","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634237","url":null,"abstract":"We prove the law of conservation of energy for propagation of electromagnetic waves through a multilayered structure consisting of LHM and dielectric slabs inserted in vacuum. Numerical method is presented to calculate the reflected and transmitted powers of the structure. The obtained results satisfy the law of conservation of energy.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133213562","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}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634214
A. V. Kraiski, T. Mironova, T. Sultanov, V. A. Postnikov
We propose a method to measure the narrowband radiation wavelength when having a digital picture of the emitting surface. The accuracy of the wavelength determination is better then 1 nm. The method was tested with pictures of the Hg spectrum and with the continuous spectrum of the filament lamp. The degree of homogeneity of the holographic sensor swelling was studied by the method in the stationary case as well as in the non-stationary one.
{"title":"Measuring surface distribution of narrowband radiation wavelength by colorimetric method","authors":"A. V. Kraiski, T. Mironova, T. Sultanov, V. A. Postnikov","doi":"10.1109/CAOL.2010.5634214","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634214","url":null,"abstract":"We propose a method to measure the narrowband radiation wavelength when having a digital picture of the emitting surface. The accuracy of the wavelength determination is better then 1 nm. The method was tested with pictures of the Hg spectrum and with the continuous spectrum of the filament lamp. The degree of homogeneity of the holographic sensor swelling was studied by the method in the stationary case as well as in the non-stationary one.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131103710","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}
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