Pub Date : 2007-07-01DOI: 10.1109/ICTON.2007.4296044
C. Michie, R. Atkinson, Ivan Andonovic, I. Glesk, P. Prucnal, K. Sasaki, G. Gupta
The results of a range of experimental characterization exercises of interferometric noise (IN) for the case of a representative 2-D time spreading wavelength-hopping (2-D TW) optical code family are presented. Interferometric noise is evaluated at a data rate of 2.5 Gbps within an OCDMA network emulation test bed established utilising fibre Bragg grating encoders/decoders. The results demonstrate that this form of noise introduces significant system power penalties and must be taken into consideration in any OCDMA network designs and implementations.
{"title":"Interferometric Noise Characterisation of a 2-D Time Spreading Wavelength Hopping OCDMA Networks using FBG Encoding/Decoding","authors":"C. Michie, R. Atkinson, Ivan Andonovic, I. Glesk, P. Prucnal, K. Sasaki, G. Gupta","doi":"10.1109/ICTON.2007.4296044","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296044","url":null,"abstract":"The results of a range of experimental characterization exercises of interferometric noise (IN) for the case of a representative 2-D time spreading wavelength-hopping (2-D TW) optical code family are presented. Interferometric noise is evaluated at a data rate of 2.5 Gbps within an OCDMA network emulation test bed established utilising fibre Bragg grating encoders/decoders. The results demonstrate that this form of noise introduces significant system power penalties and must be taken into consideration in any OCDMA network designs and implementations.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"214 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133920757","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296282
C. Raffaelli, M. Savi
The design of optical packet switch with limited number of optical components is addressed. Switch architectures based on the shared per node scheme for wavelength converters employment are considered and a cost model is proposed to compare reference architecture concept with practical implementation, based on the cost ratio among main components. The effectiveness of the approach in capturing the condition of convenience of different architectural approaches for given performance target and component costs is shown. The approach can be extended to the evaluation and comparison of a wide range of solutions.
{"title":"Cost Comparison of All-Optical Packet Switches with Shared Wavelength Converters","authors":"C. Raffaelli, M. Savi","doi":"10.1109/ICTON.2007.4296282","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296282","url":null,"abstract":"The design of optical packet switch with limited number of optical components is addressed. Switch architectures based on the shared per node scheme for wavelength converters employment are considered and a cost model is proposed to compare reference architecture concept with practical implementation, based on the cost ratio among main components. The effectiveness of the approach in capturing the condition of convenience of different architectural approaches for given performance target and component costs is shown. The approach can be extended to the evaluation and comparison of a wide range of solutions.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131538732","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296372
G. Fasching, V. Tamošiūnas, A. Benz, A. Andrews, C. Deutsch, R. Zobl, W. Schrenk, G. Strasser, K. Unterrainer
We present whispering-gallery mode terahertz quantum-cascade lasers with either "single-mode" or "double- mode" emission depending on the rotational symmetry of such resonators. Strong mode confinement in the growth and in-plane directions are provided by a double-plasmon waveguide and due to the strong impedance mismatch between the gain material and air. These ultra-compact devices exhibit increased temperature performance up to 95 K in continuous-wave mode operation and threshold currents as low as 13.5 mA. We have observed dynamical frequency pulling of the resonator mode on the GHz scale. Thus, we were able to estimate the peak gain of the material to 27 cm-1. Finite-difference time-domain calculations were performed to obtain the emission spectra from such microdisk terahertz quantum-cascade lasers.
{"title":"\"Single-Mode\" Whispering-Gallery Terahertz Quantum-Cascade Lasers with Controlled Degeneracy","authors":"G. Fasching, V. Tamošiūnas, A. Benz, A. Andrews, C. Deutsch, R. Zobl, W. Schrenk, G. Strasser, K. Unterrainer","doi":"10.1109/ICTON.2007.4296372","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296372","url":null,"abstract":"We present whispering-gallery mode terahertz quantum-cascade lasers with either \"single-mode\" or \"double- mode\" emission depending on the rotational symmetry of such resonators. Strong mode confinement in the growth and in-plane directions are provided by a double-plasmon waveguide and due to the strong impedance mismatch between the gain material and air. These ultra-compact devices exhibit increased temperature performance up to 95 K in continuous-wave mode operation and threshold currents as low as 13.5 mA. We have observed dynamical frequency pulling of the resonator mode on the GHz scale. Thus, we were able to estimate the peak gain of the material to 27 cm-1. Finite-difference time-domain calculations were performed to obtain the emission spectra from such microdisk terahertz quantum-cascade lasers.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132604263","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296167
M. S. Moreolo, G. Manzacca, G. Cincotti
We describe different coupling phenomena in PhC structures based on linear and/or point defects and we discuss some applications for all-optical signal processing. Several micro-scale devices are presented, such as highly wavelength-selective waveguides, slow-light devices, multiplexers and flat-top filters, whose performances have been enhanced by optimizing the corresponding coupling
{"title":"Coupling Phenomena in 2D Photonic Crystal Structures","authors":"M. S. Moreolo, G. Manzacca, G. Cincotti","doi":"10.1109/ICTON.2007.4296167","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296167","url":null,"abstract":"We describe different coupling phenomena in PhC structures based on linear and/or point defects and we discuss some applications for all-optical signal processing. Several micro-scale devices are presented, such as highly wavelength-selective waveguides, slow-light devices, multiplexers and flat-top filters, whose performances have been enhanced by optimizing the corresponding coupling","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130720361","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296135
M. Sciamanna, I. Gatare, A. Locquet, K. Panajotov
We report theoretically on the dynamics of two vertical-cavity surface-emitting lasers (VCSELs) coupled unidirectionally through their optical fields, in the context of chaos synchronization and its use for chaos secure communications. One of the two VCSELs is rendered chaotic by optical feedback effects and injects its chaotic output into a second, slave VCSEL. Two different injection schemes are analyzed. A first configuration is such that the master VCSEL injects light polarized orthogonal to that emitted by the free-running slave VCSEL. The orthogonal optical injection induces polarization switching of the slave VCSEL, leading to polarization synchronization between master and slave. A second configuration considers a polarization-preserving optical injection. We report on anticipative and isochronous polarization synchronization and interestingly, we show that VCSEL polarization mode competition enhances the synchronization quality.
{"title":"Polarization Synchronization Properties of Unidirectionally Coupled VCSELs","authors":"M. Sciamanna, I. Gatare, A. Locquet, K. Panajotov","doi":"10.1109/ICTON.2007.4296135","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296135","url":null,"abstract":"We report theoretically on the dynamics of two vertical-cavity surface-emitting lasers (VCSELs) coupled unidirectionally through their optical fields, in the context of chaos synchronization and its use for chaos secure communications. One of the two VCSELs is rendered chaotic by optical feedback effects and injects its chaotic output into a second, slave VCSEL. Two different injection schemes are analyzed. A first configuration is such that the master VCSEL injects light polarized orthogonal to that emitted by the free-running slave VCSEL. The orthogonal optical injection induces polarization switching of the slave VCSEL, leading to polarization synchronization between master and slave. A second configuration considers a polarization-preserving optical injection. We report on anticipative and isochronous polarization synchronization and interestingly, we show that VCSEL polarization mode competition enhances the synchronization quality.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132935955","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296127
Y. Sasaki, H. Yokota
Recent progress in research on photonic crystal fiber couplers (PCFCs) are reviewed, especially their designs and fabrications with air hole partially collapsed taper region.
{"title":"Recent Progress in Research on Photonic Crystal Fiber Couplers","authors":"Y. Sasaki, H. Yokota","doi":"10.1109/ICTON.2007.4296127","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296127","url":null,"abstract":"Recent progress in research on photonic crystal fiber couplers (PCFCs) are reviewed, especially their designs and fabrications with air hole partially collapsed taper region.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133616967","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296146
R. Pregla
Analysis algorithms for complex photonic structures like periodic hyper-structures or resonators with circular periodic waveguides are described. For the analysis of this resonator a combination of the Method of Lines (MoL) with a finite difference (FD) impedance/admittance transformation is performed. The FD-algorithm is of second order accuracy and developed in such a way that it can be immediately combined with the MoL.
{"title":"Analysis of Complex Photonic Structures","authors":"R. Pregla","doi":"10.1109/ICTON.2007.4296146","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296146","url":null,"abstract":"Analysis algorithms for complex photonic structures like periodic hyper-structures or resonators with circular periodic waveguides are described. For the analysis of this resonator a combination of the Method of Lines (MoL) with a finite difference (FD) impedance/admittance transformation is performed. The FD-algorithm is of second order accuracy and developed in such a way that it can be immediately combined with the MoL.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133680184","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296333
N. Merayo, R. Durán, P. Fernández, I. de Miguel, J. Aguado, R. Lorenzo, E. Abril
We propose a dynamic bandwidth allocation algorithm for ethernet passive optical networks (EPON) called IP-SLA (interleaved polling with SLA) to offer quality of service (QoS) in the upstream direction. IP-SLA differs clients inside the network as it takes into consideration the service level agreement (SLA) contracted by each subscriber, achieving better performance for the highest service levels agreement in terms of both mean packet delay and packet loss rate. On the other hand, IP-SLA also provides service differentiation based on the strict priority queueing method, which provides the minimum mean packet delay for the most priority services without considering the penalization caused to the lowest priority traffic. However, our algorithm keeps the mean packet delay for the most priority classes of services inside the specified bounds and uses the remaining resources to improve the performance of the lowest priority services in terms of mean packet delay and packet loss rate.
本文提出了一种用于以太网无源光网络(EPON)的动态带宽分配算法，称为IP-SLA (interleavedpolling with SLA)，以提供上行方向的服务质量(QoS)。IP-SLA考虑了每个用户签订的服务级别协议(SLA)，从而在平均数据包延迟和丢包率方面实现了最高服务级别协议的更好性能。另一方面，IP-SLA还提供基于严格优先级排队方法的业务区分，在不考虑对最低优先级流量的惩罚的情况下，为最优先级的业务提供最小的平均报文延迟。然而，我们的算法使大多数优先级的服务类别的平均包延迟保持在指定的范围内，并使用剩余的资源来提高最低优先级的服务在平均包延迟和丢包率方面的性能。
{"title":"Interleaved Polling Algorithm with Service Level Agreement (SLA) to Improve QoS in Ethernet PONs","authors":"N. Merayo, R. Durán, P. Fernández, I. de Miguel, J. Aguado, R. Lorenzo, E. Abril","doi":"10.1109/ICTON.2007.4296333","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296333","url":null,"abstract":"We propose a dynamic bandwidth allocation algorithm for ethernet passive optical networks (EPON) called IP-SLA (interleaved polling with SLA) to offer quality of service (QoS) in the upstream direction. IP-SLA differs clients inside the network as it takes into consideration the service level agreement (SLA) contracted by each subscriber, achieving better performance for the highest service levels agreement in terms of both mean packet delay and packet loss rate. On the other hand, IP-SLA also provides service differentiation based on the strict priority queueing method, which provides the minimum mean packet delay for the most priority services without considering the penalization caused to the lowest priority traffic. However, our algorithm keeps the mean packet delay for the most priority classes of services inside the specified bounds and uses the remaining resources to improve the performance of the lowest priority services in terms of mean packet delay and packet loss rate.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128902548","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296351
N. Sengezer, B. Puype, Ezhan Karasan, M. Pickavet
This paper comparatively studies single-layer and multi-layer traffic engineering strategies on an IP/MPLS/WDM network. These strategies are evaluated and compared in two different scenarios. In the first scenario, the strategies make use of statistical information on the traffic patterns. In the second scenario, the traffic engineering decisions are based on the instantaneous traffic information only. The performance and benefits of both approaches are discussed based on simulations considering both throughput and network resource usage.
{"title":"A Comparative Study of Single-Layer and Multi-Layer Traffic Engineering Approaches on Transparent Optical Networks","authors":"N. Sengezer, B. Puype, Ezhan Karasan, M. Pickavet","doi":"10.1109/ICTON.2007.4296351","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296351","url":null,"abstract":"This paper comparatively studies single-layer and multi-layer traffic engineering strategies on an IP/MPLS/WDM network. These strategies are evaluated and compared in two different scenarios. In the first scenario, the strategies make use of statistical information on the traffic patterns. In the second scenario, the traffic engineering decisions are based on the instantaneous traffic information only. The performance and benefits of both approaches are discussed based on simulations considering both throughput and network resource usage.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131419279","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 : 2007-07-01DOI: 10.1109/ICTON.2007.4296051
D. Forin, F. Curti, G. Beleffi, S. Taccheo, K. Ennser, M. Karásek, A. Teixeira
In this paper are evaluated the performances of a Super-Continuum generation based method to achieve wavelength conversion. The generation of the converted signal is exploitable to archive TDM demultiplexing. Some 2R regeneration capabilities of this system and the increased range of conversion is investigated.
{"title":"Performance evaluation of an All-Optical Wavelength Converter TDM Demux Based on Induced Modulation on an Auxiliary Carrier by Means of Super-Continuum Generation","authors":"D. Forin, F. Curti, G. Beleffi, S. Taccheo, K. Ennser, M. Karásek, A. Teixeira","doi":"10.1109/ICTON.2007.4296051","DOIUrl":"https://doi.org/10.1109/ICTON.2007.4296051","url":null,"abstract":"In this paper are evaluated the performances of a Super-Continuum generation based method to achieve wavelength conversion. The generation of the converted signal is exploitable to archive TDM demultiplexing. Some 2R regeneration capabilities of this system and the increased range of conversion is investigated.","PeriodicalId":265478,"journal":{"name":"2007 9th International Conference on Transparent Optical Networks","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133754766","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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