Pub Date : 2003-06-29DOI: 10.1109/ICTON.2003.1263178
R. Dionisio, M. Lima, J. D. da Rocha, J. Pinto, A. Teixeira
In this work several numerical methods, usually used to obtain the reflectivity spectrum of Bragg gratings, are studied and general conditions required for each method are analyzed and evidenced. The results are validated by comparison with a closed form analytical solution. For gratings where the solution is not evident, Rouard's method was used as the reference solution.
{"title":"Numerical methods for fiber Bragg gratings","authors":"R. Dionisio, M. Lima, J. D. da Rocha, J. Pinto, A. Teixeira","doi":"10.1109/ICTON.2003.1263178","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263178","url":null,"abstract":"In this work several numerical methods, usually used to obtain the reflectivity spectrum of Bragg gratings, are studied and general conditions required for each method are analyzed and evidenced. The results are validated by comparison with a closed form analytical solution. For gratings where the solution is not evident, Rouard's method was used as the reference solution.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"61 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":"127318592","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.2003.1263136
P. Sewell, T. Benson, A. Vukovic
The Du Fort Frankel beam propagation method is an explicit three level scheme that is ideally suited to parallel computing. In the case of media without loss or gain, the scheme is conditionally stable allowing relatively large propagation steps, however in the presence of loss or gain it is always unstable. A stabilised Du Fort Frankel scheme is presented that extends the scope of this powerful method to cover these practically important scenarios.
Du - Fort - Frankel光束传播方法是一种非常适合并行计算的显式三能级格式。在介质没有损耗或增益的情况下，该方案允许较大的传播步长是有条件稳定的，但在存在损耗或增益的情况下，它总是不稳定的。提出了一个稳定的Du Fort Frankel方案，扩展了这种强大方法的范围，以涵盖这些实际重要的场景。
{"title":"Stabilising the Du Fort Frankel beam propagation scheme for modelling lossy structures","authors":"P. Sewell, T. Benson, A. Vukovic","doi":"10.1109/ICTON.2003.1263136","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263136","url":null,"abstract":"The Du Fort Frankel beam propagation method is an explicit three level scheme that is ideally suited to parallel computing. In the case of media without loss or gain, the scheme is conditionally stable allowing relatively large propagation steps, however in the presence of loss or gain it is always unstable. A stabilised Du Fort Frankel scheme is presented that extends the scope of this powerful method to cover these practically important scenarios.","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":"128014439","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.2003.1263144
A. Ehrhardt, N. Hanik
In transparent optical networks, all data rates and formats can be transmitted simultaneously and the number of transponders, as the main driver of network costs, can be reduced significantly. High flexibility and an effective optical 1:N-protection can be implemented by configurable passive optical add-drop-multiplexers. We performed field experiments to interconnect metropolitan and long haul optical networks transparently.
{"title":"Cost effective transparent long-distance interconnection of metropolitan networks over ultra-long-haul optical links","authors":"A. Ehrhardt, N. Hanik","doi":"10.1109/ICTON.2003.1263144","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263144","url":null,"abstract":"In transparent optical networks, all data rates and formats can be transmitted simultaneously and the number of transponders, as the main driver of network costs, can be reduced significantly. High flexibility and an effective optical 1:N-protection can be implemented by configurable passive optical add-drop-multiplexers. We performed field experiments to interconnect metropolitan and long haul optical networks transparently.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"157 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":"128097943","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.2003.1263148
P. Andersson
Summary form only given. "The 1st order of magnitude" - from POTS to DSL (64 kb/s to 512 kb/s) - is today being installed with a speed that exceeds expectations. It is now time to look ahead to "the 2nd order of magnitude" in research and development. This means the step from sub-Mb/s to multi-Mb/s to the end-user, and the corresponding networks. Practically the only driver for this would be video services in some form. The paper reviews the drivers for video services from a basic human and historic perspective. It also examines the bandwidth and service requirements for this "video revolution", and the role optical networks can play. The new image devices are not "stationary targets", so that the existing common perception of "2 Mb/s per image channel" will not be satisfactory for all time. Moreover, delivery will be over a multiplicity of competing media: broadcast, cable, discs, copper, and fibre. Quality and personalisation, both very bandwidth-driving, will be a critical competitive advantage. The role of optics is fundamental, but its role as an independent service-layer is more unclear, and depends on a matching between end-user and business oriented requirements, that must have a direct, technical realisation in the optical layer if the function shall be effectively solved by "all-optical" approaches.
{"title":"\"The 2nd order of magnitude\" - the video revolution and all-optical services","authors":"P. Andersson","doi":"10.1109/ICTON.2003.1263148","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263148","url":null,"abstract":"Summary form only given. \"The 1st order of magnitude\" - from POTS to DSL (64 kb/s to 512 kb/s) - is today being installed with a speed that exceeds expectations. It is now time to look ahead to \"the 2nd order of magnitude\" in research and development. This means the step from sub-Mb/s to multi-Mb/s to the end-user, and the corresponding networks. Practically the only driver for this would be video services in some form. The paper reviews the drivers for video services from a basic human and historic perspective. It also examines the bandwidth and service requirements for this \"video revolution\", and the role optical networks can play. The new image devices are not \"stationary targets\", so that the existing common perception of \"2 Mb/s per image channel\" will not be satisfactory for all time. Moreover, delivery will be over a multiplicity of competing media: broadcast, cable, discs, copper, and fibre. Quality and personalisation, both very bandwidth-driving, will be a critical competitive advantage. The role of optics is fundamental, but its role as an independent service-layer is more unclear, and depends on a matching between end-user and business oriented requirements, that must have a direct, technical realisation in the optical layer if the function shall be effectively solved by \"all-optical\" approaches.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"151 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":"133084395","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.2003.1264603
Q. Yan, B. Puype, I. Lievens, D. Colle, S. De Maesschalck, M. Pickavet, P. Demeester
Multi-layer traffic engineering (MTE) dynamically reconfigures the logical network as needed by the changing traffic pattern offered to the network: e.g., in the case of an IP-over-WDM network, the MTE strategy reconfigures the logical IP network. However, only a limited amount of physical resources is available in the underlying flexible network: e.g., each WDM system is able to multiplex a limited number of wavelength channels onto the same fiber. The paper investigates the impact this physical capacity constraint may impose on the performance of such MTE strategies.
{"title":"Multi-layer traffic engineering: performance evaluation under a physical capacity constraint","authors":"Q. Yan, B. Puype, I. Lievens, D. Colle, S. De Maesschalck, M. Pickavet, P. Demeester","doi":"10.1109/ICTON.2003.1264603","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264603","url":null,"abstract":"Multi-layer traffic engineering (MTE) dynamically reconfigures the logical network as needed by the changing traffic pattern offered to the network: e.g., in the case of an IP-over-WDM network, the MTE strategy reconfigures the logical IP network. However, only a limited amount of physical resources is available in the underlying flexible network: e.g., each WDM system is able to multiplex a limited number of wavelength channels onto the same fiber. The paper investigates the impact this physical capacity constraint may impose on the performance of such MTE strategies.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"35 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":"134265081","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.2003.1263141
F. Ohman, S. Bischoff, B. Tromborg, J. Mørk
We review different implementations of semiconductor devices for all-optical regeneration. A general model is presented for all-optical regeneration in fiber links, taking into consideration the trade-off between non-linearity and noise. Furthermore we discuss a novel regenerator type, based on saturable gain and absorption in a waveguide structure.
{"title":"Semiconductor devices for all-optical regeneration","authors":"F. Ohman, S. Bischoff, B. Tromborg, J. Mørk","doi":"10.1109/ICTON.2003.1263141","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1263141","url":null,"abstract":"We review different implementations of semiconductor devices for all-optical regeneration. A general model is presented for all-optical regeneration in fiber links, taking into consideration the trade-off between non-linearity and noise. Furthermore we discuss a novel regenerator type, based on saturable gain and absorption in a waveguide structure.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"5 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":"114479481","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.2003.1264639
V. Doroshenko, E. Semenova
The problem of plane electromagnetic field wave on a cone with periodical slots cut along rulings is considered. The plane wave propagates along the cone axis. It is shown, that electromagnetic problem is equivalent to the solution of the linear algebraic equations system for Fourier coefficients of scattered field components. The numerical algorithm for solving this system is constructed. Coefficients dependence on the conical structure parameters is studied. Slot dimension effect on scattered patterns is investigated for the cone with one slot.
{"title":"Plane electromagnetic wave diffraction on an unclosed cone structure","authors":"V. Doroshenko, E. Semenova","doi":"10.1109/ICTON.2003.1264639","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264639","url":null,"abstract":"The problem of plane electromagnetic field wave on a cone with periodical slots cut along rulings is considered. The plane wave propagates along the cone axis. It is shown, that electromagnetic problem is equivalent to the solution of the linear algebraic equations system for Fourier coefficients of scattered field components. The numerical algorithm for solving this system is constructed. Coefficients dependence on the conical structure parameters is studied. Slot dimension effect on scattered patterns is investigated for the cone with one slot.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"5 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":"124754945","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.2003.1264595
M. Antkowiak, R. Kotyński, T. Nasilowski, F. Berghmans, H. Thienpont
We use coupled-mode theory to model Bragg gratings written in the photosensitive core area of index-guiding air-silica holey fibers. The plane-wave method is used to find the effective refractive indices and the field distributions of the modes. The dependence of the coupling coefficients on factors such as fiber cross-section geometry, area of the doped core and doping level is analyzed.
{"title":"Modeling Bragg gratings in doped-core holey fibers","authors":"M. Antkowiak, R. Kotyński, T. Nasilowski, F. Berghmans, H. Thienpont","doi":"10.1109/ICTON.2003.1264595","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264595","url":null,"abstract":"We use coupled-mode theory to model Bragg gratings written in the photosensitive core area of index-guiding air-silica holey fibers. The plane-wave method is used to find the effective refractive indices and the field distributions of the modes. The dependence of the coupling coefficients on factors such as fiber cross-section geometry, area of the doped core and doping level is analyzed.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"2 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":"124760663","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.2003.1264608
J. Rorison
Summary form only given. There has been a significant amount of study world-wide on etching PBG structures into both VCSELs and edge-emitting lasers. The results of experiments etching PBGs structures into the DBRs of GaAs-based proton-implanted and oxide confined VCSELs using focussed ion beam etching (FIBE) are presented. The results of etching a small section of a PBG lattice on either side of the ridge waveguide in an edge-emitting laser are also be presented. A side mode suppression ratio improvement of 40dB has been observed through this technique. This has been modelled using a finite difference time domain model to understand if this is indeed a PBG effect.
{"title":"Etched lattice effects in edge-emitters and VCSELs - PBG effects or not?","authors":"J. Rorison","doi":"10.1109/ICTON.2003.1264608","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264608","url":null,"abstract":"Summary form only given. There has been a significant amount of study world-wide on etching PBG structures into both VCSELs and edge-emitting lasers. The results of experiments etching PBGs structures into the DBRs of GaAs-based proton-implanted and oxide confined VCSELs using focussed ion beam etching (FIBE) are presented. The results of etching a small section of a PBG lattice on either side of the ridge waveguide in an edge-emitting laser are also be presented. A side mode suppression ratio improvement of 40dB has been observed through this technique. This has been modelled using a finite difference time domain model to understand if this is indeed a PBG effect.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"57 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":"121041105","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.2003.1264651
M. Cryan, M. Hill, R. Varrazza, M.M. Ronda, I.J.C. Raddock, S. Yu, C. Railton, J. Rorison
2 and 3D Finite Difference Time Domain (FDTD) simulations and measurements of a hexagonal lattice 2D photonic crystal with holes having taper angles in the region of 3 to 7 degrees are performed. The results show a smoothing of band edges and increased losses. Reasonably good agreement between measured and modelled results is obtained.
{"title":"Modelling and measurement of 2D photonic crystals with tapered hole profiles","authors":"M. Cryan, M. Hill, R. Varrazza, M.M. Ronda, I.J.C. Raddock, S. Yu, C. Railton, J. Rorison","doi":"10.1109/ICTON.2003.1264651","DOIUrl":"https://doi.org/10.1109/ICTON.2003.1264651","url":null,"abstract":"2 and 3D Finite Difference Time Domain (FDTD) simulations and measurements of a hexagonal lattice 2D photonic crystal with holes having taper angles in the region of 3 to 7 degrees are performed. The results show a smoothing of band edges and increased losses. Reasonably good agreement between measured and modelled results is obtained.","PeriodicalId":272700,"journal":{"name":"Proceedings of 2003 5th International Conference on Transparent Optical Networks, 2003.","volume":"10 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":"121059185","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：