Pub Date : 2008-06-22DOI: 10.1109/ICTON.2008.4598578
L. Wosinski, B. Jaskorzyńska
In this talk we will discuss issues related to technology for dense photonic integration based on silicon platform, and review two alternatives to achieve this goal within the diffraction limit; photonic nanowires and photonic crystal waveguides. We will also present examples of our demonstrators to illustrate the feasibility of photonic wires for device miniaturization and benefits offered by photonic crystal dispersion.
{"title":"Silicon technology for photonic crystal- and nanowire devices","authors":"L. Wosinski, B. Jaskorzyńska","doi":"10.1109/ICTON.2008.4598578","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598578","url":null,"abstract":"In this talk we will discuss issues related to technology for dense photonic integration based on silicon platform, and review two alternatives to achieve this goal within the diffraction limit; photonic nanowires and photonic crystal waveguides. We will also present examples of our demonstrators to illustrate the feasibility of photonic wires for device miniaturization and benefits offered by photonic crystal dispersion.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131852119","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598800
M. Najjar, H. Rezig
This paper describes the technical issues of access and metro networks based on wavelength division multiplexing (WDM) and spectrum slicing technologies, some solutions, proposed. A WDM ring access network with tunable optical network units (ONUs) is proposed. For optimising the system, many parameters (code type, bitrate, tunable filter bandwidth, multiplexer bandwidth, ...etc) are studied. The quality of the received signal is characterised by the simulation of bet error ratio BER. Four remote nodes with four ONUs are studied and simulated with different distances between the centre node and RNs. Therefore the maximum distance can be achieved to 60 km by keeping BER under 10-9.
{"title":"Optimisation of ring metro network by using spectrum slicing method","authors":"M. Najjar, H. Rezig","doi":"10.1109/ICTON.2008.4598800","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598800","url":null,"abstract":"This paper describes the technical issues of access and metro networks based on wavelength division multiplexing (WDM) and spectrum slicing technologies, some solutions, proposed. A WDM ring access network with tunable optical network units (ONUs) is proposed. For optimising the system, many parameters (code type, bitrate, tunable filter bandwidth, multiplexer bandwidth, ...etc) are studied. The quality of the received signal is characterised by the simulation of bet error ratio BER. Four remote nodes with four ONUs are studied and simulated with different distances between the centre node and RNs. Therefore the maximum distance can be achieved to 60 km by keeping BER under 10-9.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134594760","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598610
K. Král
Theoretical results are presented on the electronic transport in the open zero-dimensional nanostructure, or a nanotransistor, in which we demonstrate the manifestation of the effect of the upconversion of the electronic energy level occupation. The self-consistent Born approximation is used to the electron-phonon interaction in a quantum dot. The well-known simple Toy Model of Supprio Datta is used for the description of a nanotransistor. We show that in an asymmetric nanodevice one can obtain a spontaneous potential step generation between the electric contacts of such a device. This will be documented numerically on a nanotransistor model in which the active region of the nanotransistor is a quantum dot having two electronic bound states. The effect can be important for the information processing using nanostructures.
{"title":"Spontaneous current and voltage generation in gated quantum dot structures","authors":"K. Král","doi":"10.1109/ICTON.2008.4598610","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598610","url":null,"abstract":"Theoretical results are presented on the electronic transport in the open zero-dimensional nanostructure, or a nanotransistor, in which we demonstrate the manifestation of the effect of the upconversion of the electronic energy level occupation. The self-consistent Born approximation is used to the electron-phonon interaction in a quantum dot. The well-known simple Toy Model of Supprio Datta is used for the description of a nanotransistor. We show that in an asymmetric nanodevice one can obtain a spontaneous potential step generation between the electric contacts of such a device. This will be documented numerically on a nanotransistor model in which the active region of the nanotransistor is a quantum dot having two electronic bound states. The effect can be important for the information processing using nanostructures.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114425711","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598756
K. Langer, J. Grubor, O. Bouchet, M. El Tabach, J. Walewski, S. Randel, M. Franke, S. Nerreter, D. O'Brien, G. Faulkner, I. Neokosmidis, G. Ntogari, M. Wolf
As a part of the EU-FP7 R&D programme, the OMEGA project (hOME Gigabit Access) aims at bridging the gap between mobile broadband terminals and the wired backbone network in homes. To provide Gb/s connectivity a combination of various technologies is considered. Beside radio frequencies, the wireless links will use infrared and visible light. Combined with power-line communications this enables a home area network (HAN) that meets the vision of broadband home networking dasiawithout new wirespsila. A technology-independent MAC layer is foreseen to control such network and to provide services as well as connectivity to any device the user wishes to connect. Moreover, this MAC layer should allow the service to follow the user from device to device in any room of a building /apartment. The contribution presents ideas and approaches for broadband optical wireless (OW) communications using infrared Gb/s hotspots and 100 Mb/s information broadcasting by means of interior lighting based on white-light LEDs. Important issues concerning the physical layer are discussed.
{"title":"Optical wireless communications for broadband access in home area networks","authors":"K. Langer, J. Grubor, O. Bouchet, M. El Tabach, J. Walewski, S. Randel, M. Franke, S. Nerreter, D. O'Brien, G. Faulkner, I. Neokosmidis, G. Ntogari, M. Wolf","doi":"10.1109/ICTON.2008.4598756","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598756","url":null,"abstract":"As a part of the EU-FP7 R&D programme, the OMEGA project (hOME Gigabit Access) aims at bridging the gap between mobile broadband terminals and the wired backbone network in homes. To provide Gb/s connectivity a combination of various technologies is considered. Beside radio frequencies, the wireless links will use infrared and visible light. Combined with power-line communications this enables a home area network (HAN) that meets the vision of broadband home networking dasiawithout new wirespsila. A technology-independent MAC layer is foreseen to control such network and to provide services as well as connectivity to any device the user wishes to connect. Moreover, this MAC layer should allow the service to follow the user from device to device in any room of a building /apartment. The contribution presents ideas and approaches for broadband optical wireless (OW) communications using infrared Gb/s hotspots and 100 Mb/s information broadcasting by means of interior lighting based on white-light LEDs. Important issues concerning the physical layer are discussed.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124286925","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598378
J. Jahns, H. Knuppertz, M. Bohling, R. Grunwald, M. Bock
Microoptics offers interesting solutions for the processing and shaping of optical signals consisting of femtosecond pulses. Since one can operate either in the spectral or in the time domain, a variety of implementations exists. As an example for the spectral filtering, we demonstrate an integrated pulse shaper using far-field grating diffraction. For fabrication, ultraprecision micromachining was used. As examples for operating in the time domain, we present two approaches for the implementation of optical tapped delay lines. One is based on the use of optical near-field diffraction and the self-imaging effect. The second uses a linear retroreflector array which is demonstrated as a variable temporal beam splitter.
{"title":"Microoptical processing and shaping of ultrashort pulses","authors":"J. Jahns, H. Knuppertz, M. Bohling, R. Grunwald, M. Bock","doi":"10.1109/ICTON.2008.4598378","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598378","url":null,"abstract":"Microoptics offers interesting solutions for the processing and shaping of optical signals consisting of femtosecond pulses. Since one can operate either in the spectral or in the time domain, a variety of implementations exists. As an example for the spectral filtering, we demonstrate an integrated pulse shaper using far-field grating diffraction. For fabrication, ultraprecision micromachining was used. As examples for operating in the time domain, we present two approaches for the implementation of optical tapped delay lines. One is based on the use of optical near-field diffraction and the self-imaging effect. The second uses a linear retroreflector array which is demonstrated as a variable temporal beam splitter.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132384887","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598769
J. A. Martín-González, E. Poves, F. J. López-Hernández
We propose a novel family of optical codes to be used in intra-satellite optical wireless networks. They are algorithm optical codes (ADCs). This family is related with the recently introduced family random optical codes (ROCs). Both families of codes are designed to be used in optical code-division multiple-access (OCDMA) systems. Similarly than their predecessor, i.e. ROCs, ADCs are specially suitable for optical networks where the number of channels varies, ever large, low bit rate requirements, energy limitations and packed data are presented. For example sensor networks demand these requirements. A detailed description of AOCs is shown in this paper. Furthermore a comparison between them and ROCs is presented. We find that AOCs provide less probability of error than ROCs, for a given length of the code and a number of users. Moreover a system using AOCs can change the length of the code easier than a system using ROCs. This fact permits a more efficient accommodation to the actual number of users. Finally the implementation in an intra-spacecraft telecommand and telemeasurement (TC/TM) optical wireless network is also described. We compare the families in the intra-spacecraft optical wireless network.
{"title":"Algorithm Optical Codes: An alternative to Random Optical Codes in an intra-satellite optical wireless network","authors":"J. A. Martín-González, E. Poves, F. J. López-Hernández","doi":"10.1109/ICTON.2008.4598769","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598769","url":null,"abstract":"We propose a novel family of optical codes to be used in intra-satellite optical wireless networks. They are algorithm optical codes (ADCs). This family is related with the recently introduced family random optical codes (ROCs). Both families of codes are designed to be used in optical code-division multiple-access (OCDMA) systems. Similarly than their predecessor, i.e. ROCs, ADCs are specially suitable for optical networks where the number of channels varies, ever large, low bit rate requirements, energy limitations and packed data are presented. For example sensor networks demand these requirements. A detailed description of AOCs is shown in this paper. Furthermore a comparison between them and ROCs is presented. We find that AOCs provide less probability of error than ROCs, for a given length of the code and a number of users. Moreover a system using AOCs can change the length of the code easier than a system using ROCs. This fact permits a more efficient accommodation to the actual number of users. Finally the implementation in an intra-spacecraft telecommand and telemeasurement (TC/TM) optical wireless network is also described. We compare the families in the intra-spacecraft optical wireless network.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"192 S536","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132905251","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598645
B. Kantarci, H. Mouftah, S. Oktug
In this paper, we present two adaptive connection provisioning algorithms to offer better availability per connection under dynamic traffic with shared backup path protection. The proposed schemes monitor the status of the network in terms of resource consumption and average unavailability per connection and adapt the sharing degree for the links. We compare our heuristic and optimized sharing degree approach with a conventional connection provisioning approach under two different topologies. The simulation results show that our proposed approaches offer better availability to incoming connection requests. Results referring to resource overbuild guarantee that shared backup protection is not violated since resource overbuild is kept in a feasible range.
{"title":"Connection provisioning with feasible shareability determination for availability-aware design of optical networks","authors":"B. Kantarci, H. Mouftah, S. Oktug","doi":"10.1109/ICTON.2008.4598645","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598645","url":null,"abstract":"In this paper, we present two adaptive connection provisioning algorithms to offer better availability per connection under dynamic traffic with shared backup path protection. The proposed schemes monitor the status of the network in terms of resource consumption and average unavailability per connection and adapt the sharing degree for the links. We compare our heuristic and optimized sharing degree approach with a conventional connection provisioning approach under two different topologies. The simulation results show that our proposed approaches offer better availability to incoming connection requests. Results referring to resource overbuild guarantee that shared backup protection is not violated since resource overbuild is kept in a feasible range.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122319874","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598762
B. Schrenk, M. Omella, J. Lázaro, J. Prat
In this paper, an approach for wavelength generation in the C-band at the remote node of a passive optical network is experimentally demonstrated. The upstream wavelength is established in a loop configuration by a remotely pumped Erbium-doped fiber and a wavelength selective feedback. By combining this upstream channel modulated at 1 Gb/s by a cheap and simple device at the customer premises with a downstream signal modulated at 10 Gb/s, a cost-effective solution for long reach access networks with a high density of possible customers is given by taking advantage of utilizing the L-band for separation of the data streams and extending the numbers of useable wavelength channels.
{"title":"Remote wavelength generation for upstream transmission in time and wavelength division multiplexed passive optical networks with C- and L-Band utilization","authors":"B. Schrenk, M. Omella, J. Lázaro, J. Prat","doi":"10.1109/ICTON.2008.4598762","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598762","url":null,"abstract":"In this paper, an approach for wavelength generation in the C-band at the remote node of a passive optical network is experimentally demonstrated. The upstream wavelength is established in a loop configuration by a remotely pumped Erbium-doped fiber and a wavelength selective feedback. By combining this upstream channel modulated at 1 Gb/s by a cheap and simple device at the customer premises with a downstream signal modulated at 10 Gb/s, a cost-effective solution for long reach access networks with a high density of possible customers is given by taking advantage of utilizing the L-band for separation of the data streams and extending the numbers of useable wavelength channels.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117232026","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598651
N. Skorin-Kapov, J. Chen, L. Wosinska
Attacks in Transparent Optical Networks present a serious security threat to successful network operation due to the high data rates involved and the vulnerabilities associated with transparency. Typical physical layer attacks can involve injecting high-powered jamming signals on legitimate data channels to exploit vulnerabilities in optical components such as crosstalk in switches and fibers, and gain competition in amplifiers. To assure a certain quality of service in the network, we propose a novel approach which considers such security threats during the network planning process. More specifically, we propose a tabu search heuristic aimed to perform lightpath routing in such a way as to minimize the possible dasiareachabilitypsila of a jamming attack with respect to gain competition and inter-channel crosstalk. In this way we limit the worst case scenario which can potentially be caused by such an attack. We tested the algorithm on the 14-node NSF network and compare with shortest path routing. The algorithm not only yields better attack protection, but reduces lightpath congestion and minimizes the upper bound on the number of wavelengths needed for wavelength assignment.
{"title":"A tabu search algorithm for attack-aware lightpath routing","authors":"N. Skorin-Kapov, J. Chen, L. Wosinska","doi":"10.1109/ICTON.2008.4598651","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598651","url":null,"abstract":"Attacks in Transparent Optical Networks present a serious security threat to successful network operation due to the high data rates involved and the vulnerabilities associated with transparency. Typical physical layer attacks can involve injecting high-powered jamming signals on legitimate data channels to exploit vulnerabilities in optical components such as crosstalk in switches and fibers, and gain competition in amplifiers. To assure a certain quality of service in the network, we propose a novel approach which considers such security threats during the network planning process. More specifically, we propose a tabu search heuristic aimed to perform lightpath routing in such a way as to minimize the possible dasiareachabilitypsila of a jamming attack with respect to gain competition and inter-channel crosstalk. In this way we limit the worst case scenario which can potentially be caused by such an attack. We tested the algorithm on the 14-node NSF network and compare with shortest path routing. The algorithm not only yields better attack protection, but reduces lightpath congestion and minimizes the upper bound on the number of wavelengths needed for wavelength assignment.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115498774","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 : 2008-06-22DOI: 10.1109/ICTON.2008.4598428
J. Lamperski
Numerical and experimental results of a multifrequency optical source with an exceptionally stable channel separation are presented. The system consists of a single master laser and a ring containing an acousto-optic frequency shifter and an optical amplifier. The operation is based on the multiple frequency shift every round trip. We tested a single and double frequency shifter configuration. For the single stage configuration up to 84 spectral lines with stable 1.5 GHz spacing were obtained. Experimental results of the system with two cascaded shifters were demonstrated for the first time and up to 30 optical carrier frequencies with 2.5 GHz channel separation were obtained. The experimental results were in agreement with numerical simulations.
{"title":"Active fiber comb source with single and double frequency shifters for UDWDM applications","authors":"J. Lamperski","doi":"10.1109/ICTON.2008.4598428","DOIUrl":"https://doi.org/10.1109/ICTON.2008.4598428","url":null,"abstract":"Numerical and experimental results of a multifrequency optical source with an exceptionally stable channel separation are presented. The system consists of a single master laser and a ring containing an acousto-optic frequency shifter and an optical amplifier. The operation is based on the multiple frequency shift every round trip. We tested a single and double frequency shifter configuration. For the single stage configuration up to 84 spectral lines with stable 1.5 GHz spacing were obtained. Experimental results of the system with two cascaded shifters were demonstrated for the first time and up to 30 optical carrier frequencies with 2.5 GHz channel separation were obtained. The experimental results were in agreement with numerical simulations.","PeriodicalId":230802,"journal":{"name":"2008 10th Anniversary International Conference on Transparent Optical Networks","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121824879","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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