Pub Date : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446956
H. Mrabet, R. Attia, I. Dayoub
The utilization of unipolar optical two-dimensional codes(2D codes) employed in OCDMA systems has given a better system performance and a diminution of multiple access interferences (MAI) relative to optical unipolar codes with one dimension(lD code). In this paper we study the error probability of 2D optical codes namely prime hop system and hybrid codes using a probability distribution approach. We demonstrate in this work that we have a higher performance when we use serials eliminations interferences receiver versus conventional receiver, in other words the error probability is decrease and the system provide an important number of simultaneous users sharing the network.
{"title":"Analysis of the error probability for optical unipolar two-dimensional codes using a serial elimination interferences receiver","authors":"H. Mrabet, R. Attia, I. Dayoub","doi":"10.1109/ICTONMW.2007.4446956","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446956","url":null,"abstract":"The utilization of unipolar optical two-dimensional codes(2D codes) employed in OCDMA systems has given a better system performance and a diminution of multiple access interferences (MAI) relative to optical unipolar codes with one dimension(lD code). In this paper we study the error probability of 2D optical codes namely prime hop system and hybrid codes using a probability distribution approach. We demonstrate in this work that we have a higher performance when we use serials eliminations interferences receiver versus conventional receiver, in other words the error probability is decrease and the system provide an important number of simultaneous users sharing the network.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124248469","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446976
G. Budzyń, J. Rzepka, M. Bielenin, W. Frączek
In this paper they present the aspects of using surface stabilized ferroelectric liquid crystal cells as optical switches. SSFLC based switches offer good parameters and construction simplicity. First a short description of liquid crystals is given, than an idea of using liquid crystal cells as optical switches is presented. Next the experiments are described and summarized.
{"title":"Optimization of surface stabilized ferroelectric liquid crystal cells for efficient optical switching","authors":"G. Budzyń, J. Rzepka, M. Bielenin, W. Frączek","doi":"10.1109/ICTONMW.2007.4446976","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446976","url":null,"abstract":"In this paper they present the aspects of using surface stabilized ferroelectric liquid crystal cells as optical switches. SSFLC based switches offer good parameters and construction simplicity. First a short description of liquid crystals is given, than an idea of using liquid crystal cells as optical switches is presented. Next the experiments are described and summarized.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125518797","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446947
L. Tartara, V. Degiorgio, R. Chérif, M. Zghal
We report about a novel kind of supercontinuum generation in a photonic crystal fibre in which the spectral broadening occurs only on the blue side of the pump wavelength. Along with experimental data we present a theoretical explanation for the observed phenomena which is supported by the results of a set of numerical simulations.
{"title":"Single-sided supercontinuum generation by high order mode excitation in a photonic crystal fibre","authors":"L. Tartara, V. Degiorgio, R. Chérif, M. Zghal","doi":"10.1109/ICTONMW.2007.4446947","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446947","url":null,"abstract":"We report about a novel kind of supercontinuum generation in a photonic crystal fibre in which the spectral broadening occurs only on the blue side of the pump wavelength. Along with experimental data we present a theoretical explanation for the observed phenomena which is supported by the results of a set of numerical simulations.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129960553","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446935
H. Derbal, C. Bergeret, N. Ziani, S. D. Seignon, J. Cousseau, J. Nunzi
Photovoltaic electricity is considered as an alternative to the actual ways of producing electricity for its different advantages. Its friendly impact on the environment and projected low cost makes it an attractive substitute. The plastic photovoltaic technology has been developing in recent years with a need to improve yield efficiency to end-up taking an important place in the world market. Different plastic photovoltaic solar cells have been fabricated recently using a variety of designs including small molecules, polymers or hybrid (organic /inorganic) materials. Record photovoltaic conversion efficiency was reported for interpenetrated based on the P3HT: PCBM system with 4~5% yield. The PCBM molecule presents some drawbacks such as low visible absorption, relatively high cost and multi-step synthesis. Due to the above, some new synthetic approaches around the fullerene C60 unit were proposed. In this study, we investigate the photovoltaic properties of different fullerene C60 derivatives blended into poly(3-hexylthiophene). An attempt to explain our photovoltaic characteristics in correlation with FTIR, fluorescence and UV/Vis absorption spectra was carried out. A study of the morphology was also achieved.
{"title":"Realisation and characterisation organic plastic solar cells based on different derivatives of fullerene-C60","authors":"H. Derbal, C. Bergeret, N. Ziani, S. D. Seignon, J. Cousseau, J. Nunzi","doi":"10.1109/ICTONMW.2007.4446935","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446935","url":null,"abstract":"Photovoltaic electricity is considered as an alternative to the actual ways of producing electricity for its different advantages. Its friendly impact on the environment and projected low cost makes it an attractive substitute. The plastic photovoltaic technology has been developing in recent years with a need to improve yield efficiency to end-up taking an important place in the world market. Different plastic photovoltaic solar cells have been fabricated recently using a variety of designs including small molecules, polymers or hybrid (organic /inorganic) materials. Record photovoltaic conversion efficiency was reported for interpenetrated based on the P3HT: PCBM system with 4~5% yield. The PCBM molecule presents some drawbacks such as low visible absorption, relatively high cost and multi-step synthesis. Due to the above, some new synthetic approaches around the fullerene C60 unit were proposed. In this study, we investigate the photovoltaic properties of different fullerene C60 derivatives blended into poly(3-hexylthiophene). An attempt to explain our photovoltaic characteristics in correlation with FTIR, fluorescence and UV/Vis absorption spectra was carried out. A study of the morphology was also achieved.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130955524","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446950
F. Touati
High gain, wide bandwidth, low noise, and low-power transimpedance amplifiers based on new BiCMOS common-base topologies have been designed for fiber-optic receivers. In particular a design approach, hereafter called "a more-FET approach", added a new dimension to effectively optimize performance tradeoffs inherent in such circuits. Using conventional silicon 0.8 mum process parameters, simulated performance features of a total-FET transimpedance amplifier operating at 7.2 GHz, which is close to the technology fT of 12 GHz, are presented. The results are superior to those of similar recent designs and comparable to IC designs using GaAs technology. A detailed analysis of the design architecture, including a discussion on the effects of moving toward more FET-based designs is presented.
{"title":"Analysis and design of fully-integrated low-noise amplifiers for optical receivers","authors":"F. Touati","doi":"10.1109/ICTONMW.2007.4446950","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446950","url":null,"abstract":"High gain, wide bandwidth, low noise, and low-power transimpedance amplifiers based on new BiCMOS common-base topologies have been designed for fiber-optic receivers. In particular a design approach, hereafter called \"a more-FET approach\", added a new dimension to effectively optimize performance tradeoffs inherent in such circuits. Using conventional silicon 0.8 mum process parameters, simulated performance features of a total-FET transimpedance amplifier operating at 7.2 GHz, which is close to the technology fT of 12 GHz, are presented. The results are superior to those of similar recent designs and comparable to IC designs using GaAs technology. A detailed analysis of the design architecture, including a discussion on the effects of moving toward more FET-based designs is presented.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128910490","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446930
V. López, J. García-Dorado, J.A. Hernandez, J. Aracil
Recent research in optical burst switched networks has proposed solutions to support subwavelength reservation for the periodic transmission of data bursts, which can coexist with conventional asynchronous bursts, bringing the polymorphous, agile and transparent optical networks (PATON) [1]. Thus, network operators can distribute IPTV channels to their customers, whereby they can use the spare bandwidth for the transmission of best-effort traffic, making use of the free gaps in between such periodic reservations. This work proposes scheduling algorithms for the transmission of periodic channels using PATON, and studies the blocking probability observed by best-effort traffic, when such scheduling algorithms are used.
{"title":"Performance comparison of scheduling algorithms for IPTV traffic over polymorphous OBS routers","authors":"V. López, J. García-Dorado, J.A. Hernandez, J. Aracil","doi":"10.1109/ICTONMW.2007.4446930","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446930","url":null,"abstract":"Recent research in optical burst switched networks has proposed solutions to support subwavelength reservation for the periodic transmission of data bursts, which can coexist with conventional asynchronous bursts, bringing the polymorphous, agile and transparent optical networks (PATON) [1]. Thus, network operators can distribute IPTV channels to their customers, whereby they can use the spare bandwidth for the transmission of best-effort traffic, making use of the free gaps in between such periodic reservations. This work proposes scheduling algorithms for the transmission of periodic channels using PATON, and studies the blocking probability observed by best-effort traffic, when such scheduling algorithms are used.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121630672","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446984
M. Marciniak
100 Gb Ethernet is foreseen by 2014. This contribution reviews the advantages and constraints of the optical networking and discusses how they meet the 100 Gb Ethernet needs.
{"title":"100 Gb Ethernet over fibre networks- reality and challenges","authors":"M. Marciniak","doi":"10.1109/ICTONMW.2007.4446984","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446984","url":null,"abstract":"100 Gb Ethernet is foreseen by 2014. This contribution reviews the advantages and constraints of the optical networking and discusses how they meet the 100 Gb Ethernet needs.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":" 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120937433","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446923
A. Komarov, H. Leblond, F. Sanchez
On basis of numerical simulation we study the peculiarities of the formation of ultrashort pulses, their interaction, the formation of stable multiple soliton structures in passive mode-locked fiber lasers with anomalous frequency dispersion. It is found the novel type of a dissipative soliton. The single soliton of this type has asymmetric spatial and spectral profiles and demonstrates bistability: two stable states with right and left spectral-spatial asymmetries for which the single soliton velocities are different.
{"title":"Modelling of multiple soliton operation of fiber lasers with anomalous frequency dispersion","authors":"A. Komarov, H. Leblond, F. Sanchez","doi":"10.1109/ICTONMW.2007.4446923","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446923","url":null,"abstract":"On basis of numerical simulation we study the peculiarities of the formation of ultrashort pulses, their interaction, the formation of stable multiple soliton structures in passive mode-locked fiber lasers with anomalous frequency dispersion. It is found the novel type of a dissipative soliton. The single soliton of this type has asymmetric spatial and spectral profiles and demonstrates bistability: two stable states with right and left spectral-spatial asymmetries for which the single soliton velocities are different.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117340875","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446944
Y. Said, H. Rezig, A. Bouallègue
The aim of the present work is to present an analysis of the impact of Semiconductor Optical Amplifier length variation on the cross-polarization modulation (XPolM) effect in the structure. This nonlinear behavior, which is exploited to assure high speed devices and various applications for the high bit rate optical networks, is investigated referring to numerical simulations based on Stokes parameters measurement. Consequently, it is shown that the azimuth and the ellipticity parameters at the output undergo changes by varying the input polarization, bias current and obviously the SOA length which plays an important role in the gain dynamics of the structure.
{"title":"Cross-polarization modulation effects in long semiconductor optical amplifiers","authors":"Y. Said, H. Rezig, A. Bouallègue","doi":"10.1109/ICTONMW.2007.4446944","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446944","url":null,"abstract":"The aim of the present work is to present an analysis of the impact of Semiconductor Optical Amplifier length variation on the cross-polarization modulation (XPolM) effect in the structure. This nonlinear behavior, which is exploited to assure high speed devices and various applications for the high bit rate optical networks, is investigated referring to numerical simulations based on Stokes parameters measurement. Consequently, it is shown that the azimuth and the ellipticity parameters at the output undergo changes by varying the input polarization, bias current and obviously the SOA length which plays an important role in the gain dynamics of the structure.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128447719","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 : 2007-12-01DOI: 10.1109/ICTONMW.2007.4446960
V. Smokal, B. Derkowska, R. Czaplicki, O. Krupka, A. Kolendo, B. Sahraoui
Oxazalone and thiohydantoin derivatives were synthesized and their physicochemical properties are determined by absorption, fluorescence, fluorescence excitation and HNMR spectroscopies. The polymerization was carried out in DMF with AIBN as initiator. The products of polymerization were characterized by HNMR. The third order nonlinear optical properties of oxazolone and thiohydantoin containing compounds have been investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm.
{"title":"Polymers with benzylidene fragment for nonlinear optical application","authors":"V. Smokal, B. Derkowska, R. Czaplicki, O. Krupka, A. Kolendo, B. Sahraoui","doi":"10.1109/ICTONMW.2007.4446960","DOIUrl":"https://doi.org/10.1109/ICTONMW.2007.4446960","url":null,"abstract":"Oxazalone and thiohydantoin derivatives were synthesized and their physicochemical properties are determined by absorption, fluorescence, fluorescence excitation and HNMR spectroscopies. The polymerization was carried out in DMF with AIBN as initiator. The products of polymerization were characterized by HNMR. The third order nonlinear optical properties of oxazolone and thiohydantoin containing compounds have been investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm.","PeriodicalId":366170,"journal":{"name":"2007 ICTON Mediterranean Winter Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134083838","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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