Pub Date : 2003-06-29DOI: 10.1109/ICTON.2003.1264646
S. Zhukovsky
A fractal Cantor-like multilayer structure with one constituent material exhibiting optical birefringence is numerically shown to function as a quarter wave retarder. The proposed device is several times smaller than the corresponding conventional QWR and contains about 15 limes less anisotropic material. Together with the apparent absence of form anisotropy, it suggests that material birefringence can be considerably enhanced when the material in question is arranged in a deterministic non-periodic fashion, presumably by localization of light that is known to occur in such systems.
{"title":"Nanosized quarter-wave retarder based on fractal anisotropic multilayer structures","authors":"S. Zhukovsky","doi":"10.1109/ICTON.2003.1264646","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264646","url":null,"abstract":"A fractal Cantor-like multilayer structure with one constituent material exhibiting optical birefringence is numerically shown to function as a quarter wave retarder. The proposed device is several times smaller than the corresponding conventional QWR and contains about 15 limes less anisotropic material. Together with the apparent absence of form anisotropy, it suggests that material birefringence can be considerably enhanced when the material in question is arranged in a deterministic non-periodic fashion, presumably by localization of light that is known to occur in such systems.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124904114","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1263187
P. Ivanov, I. Sukhoivanov, R. Michalzik
In the paper we discuss the problem of the definition of single-mode conditions for transverse optical modes in a vertical-cavity surface-emitting laser with incorporated two-dimensional photonic crystal. Results presented here shows, that analysis of mode properties using BV diagrams for guiding modes is difficult to apply in the case. To omit the problem, we have used computation of the normalized propagation constant of a waveguiding mode B versus vacuum propagation constant k. In result, the single-mode conditions for defect area formed by one removed air-hole were find.
{"title":"Determination of cold-cavity single-mode conditions in photonic crystal surface-emitting lasers","authors":"P. Ivanov, I. Sukhoivanov, R. Michalzik","doi":"10.1109/ICTON.2003.1263187","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263187","url":null,"abstract":"In the paper we discuss the problem of the definition of single-mode conditions for transverse optical modes in a vertical-cavity surface-emitting laser with incorporated two-dimensional photonic crystal. Results presented here shows, that analysis of mode properties using BV diagrams for guiding modes is difficult to apply in the case. To omit the problem, we have used computation of the normalized propagation constant of a waveguiding mode B versus vacuum propagation constant k. In result, the single-mode conditions for defect area formed by one removed air-hole were find.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122080887","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1264632
A.D. Remenyuk, E. Astrova, L.I. Korovin, I. G. Lang, V. Shuman
The macroporous silicon (ma-Si) is a type of a porous Si where vertical pores form a two-dimensional (2D) periodic structure on the surface, and the pore depth is on orders of magnitude larger than the inter-pore distance and pore diameter. The combination of a high-quality 2D periodic structure with a high refractive index contrast in ma-Si opens the way to its application as a 2D photonic crystal. A photonic band gap appears if light propagates in a direction perpendicular to pore axis. The spectral position and width of the gap are defined by the structure symmetry, inter-pore distance, and pore radius. For the light propagating parallel to the pore axis, ma-Si can be used as a shortpass filter, transparent in the short-wavelength range and blocking the long-wavelength radiation. In ma-Si filters, light propagates in air in pores surrounded by silicon, absorbing visible light. The pore dimensions, i.e., their diameter and length, define the filter transmission spectrum. As far as we know by now, only one study devoted to ma-Si transmission in the visible range exists. The present study is devoted to further experimental and theoretical investigation of the ma-Si transmission in the visible range for the light propagating parallel to pore axis.
{"title":"Diffraction effects in macroporous silicon with through pores","authors":"A.D. Remenyuk, E. Astrova, L.I. Korovin, I. G. Lang, V. Shuman","doi":"10.1109/ICTON.2003.1264632","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264632","url":null,"abstract":"The macroporous silicon (ma-Si) is a type of a porous Si where vertical pores form a two-dimensional (2D) periodic structure on the surface, and the pore depth is on orders of magnitude larger than the inter-pore distance and pore diameter. The combination of a high-quality 2D periodic structure with a high refractive index contrast in ma-Si opens the way to its application as a 2D photonic crystal. A photonic band gap appears if light propagates in a direction perpendicular to pore axis. The spectral position and width of the gap are defined by the structure symmetry, inter-pore distance, and pore radius. For the light propagating parallel to the pore axis, ma-Si can be used as a shortpass filter, transparent in the short-wavelength range and blocking the long-wavelength radiation. In ma-Si filters, light propagates in air in pores surrounded by silicon, absorbing visible light. The pore dimensions, i.e., their diameter and length, define the filter transmission spectrum. As far as we know by now, only one study devoted to ma-Si transmission in the visible range exists. The present study is devoted to further experimental and theoretical investigation of the ma-Si transmission in the visible range for the light propagating parallel to pore axis.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129069004","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1263171
M. Jaworski
State-of-the-art of high-capacity optical modulation formats used in high-speed DWDM transmission systems are presented. Simulations of 320 km transmission of DWDM signal show that DQPSK modulation is superior to CS-RZ (carrier-suppressed return-to-zero) and duobinary phase modulation with respect to signal degradation due to Kerr nonlinearities.
{"title":"Optical modulation formats for high-speed DWDM systems","authors":"M. Jaworski","doi":"10.1109/ICTON.2003.1263171","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263171","url":null,"abstract":"State-of-the-art of high-capacity optical modulation formats used in high-speed DWDM transmission systems are presented. Simulations of 320 km transmission of DWDM signal show that DQPSK modulation is superior to CS-RZ (carrier-suppressed return-to-zero) and duobinary phase modulation with respect to signal degradation due to Kerr nonlinearities.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124122625","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1264596
T. Nasilowski, Rafal Kotynskia, M. Antkowiak, F. Berghmans, H. Thienpont
A numerical investigation of fundamental and higher order modes propagating in doped core holey fiber is presented. The conditions for the co-existence of two competing light guiding mechanisms, their consequences on the mode propagation and the potentialities for novel applications are discussed.
{"title":"Mode analysis of doped-core holey fibers","authors":"T. Nasilowski, Rafal Kotynskia, M. Antkowiak, F. Berghmans, H. Thienpont","doi":"10.1109/ICTON.2003.1264596","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264596","url":null,"abstract":"A numerical investigation of fundamental and higher order modes propagating in doped core holey fiber is presented. The conditions for the co-existence of two competing light guiding mechanisms, their consequences on the mode propagation and the potentialities for novel applications are discussed.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116298349","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1264587
I. Ramdani, J. Prat, J. Comellas
Efficient allocation of low bit rate traffic streams onto optical channels, frequently referred as traffic grooming, has become a major issue in optical transport networks. The paper studies resource utilization in an optical mesh network under different allocation strategies. Traffic grooming is done following two different strategies: optical end-to-end (transparent) and hop-by-hop (opaque). The first scenario is advantageous when connection request capacity approaches that of the optical channels. Hop-by-hop offers the advantage of allowing intermediate nodes to re-use an already active optical channel with free bandwidth. A comparison in terms of the number of line terminating equipment items (SDH ports) and the number of active optical channels (wavelengths) in a generic mesh network is provided. Quantitative results are obtained by means of simulation.
{"title":"Grooming in SDH/WDM mesh networks for different traffic granularities","authors":"I. Ramdani, J. Prat, J. Comellas","doi":"10.1109/ICTON.2003.1264587","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264587","url":null,"abstract":"Efficient allocation of low bit rate traffic streams onto optical channels, frequently referred as traffic grooming, has become a major issue in optical transport networks. The paper studies resource utilization in an optical mesh network under different allocation strategies. Traffic grooming is done following two different strategies: optical end-to-end (transparent) and hop-by-hop (opaque). The first scenario is advantageous when connection request capacity approaches that of the optical channels. Hop-by-hop offers the advantage of allowing intermediate nodes to re-use an already active optical channel with free bandwidth. A comparison in terms of the number of line terminating equipment items (SDH ports) and the number of active optical channels (wavelengths) in a generic mesh network is provided. Quantitative results are obtained by means of simulation.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114020441","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1263159
H. Baghdasaryan, T. Knyazyan, A. Mankulov
A model of an amplifying semiconductor Gires-Tournois microinterferometer is correctly analysed by the method of single expression (MSE). Interferometer's spectral characteristics versus the distance between the mirror and the active transient layer are obtained for different values of the active layer thickness. The optimal values of the active layer thickness and the distance between the mirror and the active layer for light maximal amplification are defined. Distributions of electric field and power flow density along the structure are obtained at the characteristic points of the structure's spectra.
{"title":"Numerical modelling of amplifying Gires-Tournois microinterferometer by the method of single expression","authors":"H. Baghdasaryan, T. Knyazyan, A. Mankulov","doi":"10.1109/ICTON.2003.1263159","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263159","url":null,"abstract":"A model of an amplifying semiconductor Gires-Tournois microinterferometer is correctly analysed by the method of single expression (MSE). Interferometer's spectral characteristics versus the distance between the mirror and the active transient layer are obtained for different values of the active layer thickness. The optimal values of the active layer thickness and the distance between the mirror and the active layer for light maximal amplification are defined. Distributions of electric field and power flow density along the structure are obtained at the characteristic points of the structure's spectra.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132011057","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1264600
J. Capmany, D. Pastor, S. Sales, B. Ortega
We introduce and review the main features of subcarrier multiplexed label swapping techniques as a supporting technology for the implementation of the optical Internet. The efforts that are currently being made under the framework of the EU funded IST-LABELS project are also described.
{"title":"Subcarrier multiplexed optical label swapping based on subcarrier multiplexing: a network paradigm for the implementation of optical Internet","authors":"J. Capmany, D. Pastor, S. Sales, B. Ortega","doi":"10.1109/ICTON.2003.1264600","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264600","url":null,"abstract":"We introduce and review the main features of subcarrier multiplexed label swapping techniques as a supporting technology for the implementation of the optical Internet. The efforts that are currently being made under the framework of the EU funded IST-LABELS project are also described.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134227000","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1264617
A. Popov, A. Vinogradov, R.M. Fechtchenko, Y. Uspenskii, E. Dianov
A qualitative analysis of a planar Bragg waveguide is done using coupled wave theory and rounded permittivity profile of the multilayer cladding. Explicit formulae for trapped mode field distribution, ohmic and radiation losses are derived from the simplified dispersion equation. Practical estimates of the waveguide parameters are given.
{"title":"Qualitative theory and modeling of hollow Bragg waveguides","authors":"A. Popov, A. Vinogradov, R.M. Fechtchenko, Y. Uspenskii, E. Dianov","doi":"10.1109/ICTON.2003.1264617","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264617","url":null,"abstract":"A qualitative analysis of a planar Bragg waveguide is done using coupled wave theory and rounded permittivity profile of the multilayer cladding. Explicit formulae for trapped mode field distribution, ohmic and radiation losses are derived from the simplified dispersion equation. Practical estimates of the waveguide parameters are given.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114864601","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 : 2003-06-29DOI: 10.1109/ICTON.2003.1264575
M. Marciniak
It is commonly accepted the evolution from circuit-switched to connectionless networks be an imminent process. However, the lack of quality of service guarantee for real-time including voice traffic in a packet network appears as a main problem to overcome. In the paper a hybrid network is proposed which combines both real-time and data traffic and allows us to exploit fully the bandwidth offered by the transparent network.
{"title":"From circuit- to packet-switched or to hybrid network? A new approach to voice + IP network","authors":"M. Marciniak","doi":"10.1109/ICTON.2003.1264575","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264575","url":null,"abstract":"It is commonly accepted the evolution from circuit-switched to connectionless networks be an imminent process. However, the lack of quality of service guarantee for real-time including voice traffic in a packet network appears as a main problem to overcome. In the paper a hybrid network is proposed which combines both real-time and data traffic and allows us to exploit fully the bandwidth offered by the transparent network.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"835 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115993814","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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