Pub Date : 2015-05-11DOI: 10.1109/ONDM.2015.7127266
S. Pachnicke, M. Eiselt, K. Grobe, J. Elbers
We report on the state-of-the-art and future prospects and challenges of optical access networks. These networks can be used for various different applications such as fiber-to-the-home (FTTH) but also for backhauling data communications as well as for mobile back- and fronthauling purposes. While currently different, physically separated networks are used for these applications, in the future convergence to a unified network is envisioned. We will describe the challenges associated with such a network. We will also give a short overview on current standardization activities and an outlook to next-generation optical access networks.
{"title":"The frontiers of optical access networks","authors":"S. Pachnicke, M. Eiselt, K. Grobe, J. Elbers","doi":"10.1109/ONDM.2015.7127266","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127266","url":null,"abstract":"We report on the state-of-the-art and future prospects and challenges of optical access networks. These networks can be used for various different applications such as fiber-to-the-home (FTTH) but also for backhauling data communications as well as for mobile back- and fronthauling purposes. While currently different, physically separated networks are used for these applications, in the future convergence to a unified network is envisioned. We will describe the challenges associated with such a network. We will also give a short overview on current standardization activities and an outlook to next-generation optical access networks.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131196952","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127264
G. Shen, Yongcheng Li, Heming Zhao
Elastic optical network (EON) is a promising candidate for the next generation optical transport network because of its high spectrum efficiency and flexible spectrum allocation. However, to migrate from today's dense wavelength division multiplexing (DWDM) network to EON, optical nodes such as reconfigurable optical add/drop multiplexers (ROADMs) should be replaced with the ones with expensive flexi-grid wavelength selective switches (WSSs). Thus, whether and how today's optical network will be evolved to EON is still under debate. Meanwhile, with the technical maturity of optical super-channels that transmit bit rates at the level of 1 Tb/s, super-channels are expected to dominate the future optical transport network because of their attractiveness of high spectrum efficiency and superior cost effectiveness. In this paper, we propose a new quasi-coarse wavelength division multiplexing (Quasi-CWDM) optical network architecture that is compatible to today's WDM network in spectrum operation, while still maintaining the flexibility of adaptation between the bit rate and the transparent reach of an optical super-channel, but not requiring expensive flexi-grid WSSs. Specifically, the Quasi-CWDM optical network employs large fixed frequency grids, whose spacing falls between the traditional CWDM and DWDM, e.g., 200 GHz or 400 GHz. To maintain the flexibility between the bit rate and the transparent reach of an optical super-channel, different modulation formats are chosen according to channel physical distances. To minimize network hardware cost and maximize carried user traffic demand, we develop a mixed integer linear programming (MILP) model and a heuristic algorithm that can efficiently groom upper-layer IP traffic onto the optical layer by optical super-channels. We compare the design based on the Quasi-CWDM network to those based on the DWDM network and the advanced EON. It is found that the proposed Quasi-CWDM network has a much lower hardware cost than the other two types of networks, while achieving spectrum efficiency close to EON.
{"title":"Quasi-CWDM optical network: cost effective and spectrum efficient architecture for future optical networks (invited)","authors":"G. Shen, Yongcheng Li, Heming Zhao","doi":"10.1109/ONDM.2015.7127264","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127264","url":null,"abstract":"Elastic optical network (EON) is a promising candidate for the next generation optical transport network because of its high spectrum efficiency and flexible spectrum allocation. However, to migrate from today's dense wavelength division multiplexing (DWDM) network to EON, optical nodes such as reconfigurable optical add/drop multiplexers (ROADMs) should be replaced with the ones with expensive flexi-grid wavelength selective switches (WSSs). Thus, whether and how today's optical network will be evolved to EON is still under debate. Meanwhile, with the technical maturity of optical super-channels that transmit bit rates at the level of 1 Tb/s, super-channels are expected to dominate the future optical transport network because of their attractiveness of high spectrum efficiency and superior cost effectiveness. In this paper, we propose a new quasi-coarse wavelength division multiplexing (Quasi-CWDM) optical network architecture that is compatible to today's WDM network in spectrum operation, while still maintaining the flexibility of adaptation between the bit rate and the transparent reach of an optical super-channel, but not requiring expensive flexi-grid WSSs. Specifically, the Quasi-CWDM optical network employs large fixed frequency grids, whose spacing falls between the traditional CWDM and DWDM, e.g., 200 GHz or 400 GHz. To maintain the flexibility between the bit rate and the transparent reach of an optical super-channel, different modulation formats are chosen according to channel physical distances. To minimize network hardware cost and maximize carried user traffic demand, we develop a mixed integer linear programming (MILP) model and a heuristic algorithm that can efficiently groom upper-layer IP traffic onto the optical layer by optical super-channels. We compare the design based on the Quasi-CWDM network to those based on the DWDM network and the advanced EON. It is found that the proposed Quasi-CWDM network has a much lower hardware cost than the other two types of networks, while achieving spectrum efficiency close to EON.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133116978","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127267
B. Jaumard, S. Song
We investigate FTTX (Fiber-to-the Home/Premises/Curb) Passive Optical Networks (PON) for the deployment of broadband access networks such that the opportunities of optical fiber enabled technologies as well as of passive switching equipment can be exploited. We focus on designing the best possible architectures of hybrid FTTX PONs, which embraces both TDM and WDM technology. Advantages of hybrid PONs are twofold: they can (i) offer increased data rate to each user by employing WDM technology, (ii) provide flexible bandwidth utilization by employing TDM technology. We propose a novel network design optimization scheme for greenfield deployment of a set of hybrid PONs. For a given geographical location of an optical line terminal (OLT), a set of optical network units (ONUs) and their corresponding aggregated traffic demand, our proposed optimization scheme determines the design and dimensioning of the most economical set of hybrid PON networks while satisfying unicast/multicast traffic demands and taking into account the signal attenuation constraints. Computational experiments have been conducted on a set of up to 512 ONUs in order to evaluate the performance of the proposed scheme.
{"title":"Dimensioning hybrid PONs","authors":"B. Jaumard, S. Song","doi":"10.1109/ONDM.2015.7127267","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127267","url":null,"abstract":"We investigate FTTX (Fiber-to-the Home/Premises/Curb) Passive Optical Networks (PON) for the deployment of broadband access networks such that the opportunities of optical fiber enabled technologies as well as of passive switching equipment can be exploited. We focus on designing the best possible architectures of hybrid FTTX PONs, which embraces both TDM and WDM technology. Advantages of hybrid PONs are twofold: they can (i) offer increased data rate to each user by employing WDM technology, (ii) provide flexible bandwidth utilization by employing TDM technology. We propose a novel network design optimization scheme for greenfield deployment of a set of hybrid PONs. For a given geographical location of an optical line terminal (OLT), a set of optical network units (ONUs) and their corresponding aggregated traffic demand, our proposed optimization scheme determines the design and dimensioning of the most economical set of hybrid PON networks while satisfying unicast/multicast traffic demands and taking into account the signal attenuation constraints. Computational experiments have been conducted on a set of up to 512 ONUs in order to evaluate the performance of the proposed scheme.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133882336","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127287
H. Hasegawa, Y. Mori, Ken-ichi Sato
A novel resilient optical routing network architecture that adopts finely granular protection and finely granular add/drop is presented. The routing scheme defines optical pipes such that multiple optical paths can be carried by each pipe and can be dropped or added at any node on the route of a pipe. The routing scheme also makes it possible to enhance frequency utilization within pipes as we recently verified. We develop a static network design algorithm that establishes coarse granular optical pipes so that working and backup optical paths are efficiently carried by these pipes. Numerical experiments elucidate that the number of fibers in a network can be reduced up to 20% for 400Gbps channels without any modification of hardware.
{"title":"Resilient grouped routing optical networks with finely granular protection","authors":"H. Hasegawa, Y. Mori, Ken-ichi Sato","doi":"10.1109/ONDM.2015.7127287","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127287","url":null,"abstract":"A novel resilient optical routing network architecture that adopts finely granular protection and finely granular add/drop is presented. The routing scheme defines optical pipes such that multiple optical paths can be carried by each pipe and can be dropped or added at any node on the route of a pipe. The routing scheme also makes it possible to enhance frequency utilization within pipes as we recently verified. We develop a static network design algorithm that establishes coarse granular optical pipes so that working and backup optical paths are efficiently carried by these pipes. Numerical experiments elucidate that the number of fibers in a network can be reduced up to 20% for 400Gbps channels without any modification of hardware.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133604799","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127291
Muhammad Imran, F. Fresi, G. Meloni, L. Potí
A flexible optical carrier source for bandwidth variable transponders (BV-Ts) managing a variable number of carriers at continuously variable free spectral range (FSR) up to 100 GHz is experimentally demonstrated. The photonic radio frequency (RF) synthesis allows achieving larger carrier spacing and simplified tuning without need of multiple RF clock sources. The cost and complexity of the scheme is independent of carrier spacing.
{"title":"12.5GHz-100GHz tunable spacing optical carrier source for flexgrid bandwidth variable transponders","authors":"Muhammad Imran, F. Fresi, G. Meloni, L. Potí","doi":"10.1109/ONDM.2015.7127291","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127291","url":null,"abstract":"A flexible optical carrier source for bandwidth variable transponders (BV-Ts) managing a variable number of carriers at continuously variable free spectral range (FSR) up to 100 GHz is experimentally demonstrated. The photonic radio frequency (RF) synthesis allows achieving larger carrier spacing and simplified tuning without need of multiple RF clock sources. The cost and complexity of the scheme is independent of carrier spacing.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116596914","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127277
P. Iovanna, Fabio Ubaldi, Teresa Pepe, L. Contreras, V. López, J. Gimenez
This paper describes the requirements and challenges on WAN due to NFV in case of datacenter interconnections crossing heterogeneous domains for technology, control and vendors. It is presented a new architecture with novel functional building blocks between transport and service layers named E2E harmonization. Such architecture allows efficient virtualization for the service layer including novel elasticity parameters, while allow optimization for the transport resource. The solution allows evolving the transport network with new domains such as SDN, EON step by step that can be included as “plug-and-play” with easy interwork with existing transport domains. The solution is validated on a relevant network scenario provided from Telefonica showing the capability to following the dynamic traffic behavior without wasting bandwidth and guarantee 100% of traffic requests.
{"title":"Main challenges on WAN due to NFV and SDN: multi-layer and multi-domain network virtualization and routing","authors":"P. Iovanna, Fabio Ubaldi, Teresa Pepe, L. Contreras, V. López, J. Gimenez","doi":"10.1109/ONDM.2015.7127277","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127277","url":null,"abstract":"This paper describes the requirements and challenges on WAN due to NFV in case of datacenter interconnections crossing heterogeneous domains for technology, control and vendors. It is presented a new architecture with novel functional building blocks between transport and service layers named E2E harmonization. Such architecture allows efficient virtualization for the service layer including novel elasticity parameters, while allow optimization for the transport resource. The solution allows evolving the transport network with new domains such as SDN, EON step by step that can be included as “plug-and-play” with easy interwork with existing transport domains. The solution is validated on a relevant network scenario provided from Telefonica showing the capability to following the dynamic traffic behavior without wasting bandwidth and guarantee 100% of traffic requests.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125204897","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127288
F. Fresi, N. Sambo, C. Porzi, G. Meloni, A. Bogoni, L. Potí
We investigate the use of high-order sum-difference all-pass microring filters for switching applications in circuit-switched elastic optical networks. A practical design taking into account optical losses accordingly to typical reported values for strip-waveguides in silicon-on-insulator technology is considered. Simulations performed on 30 Gbaud Nyquist PM-QPSK signals show that the proposed structure can achieve similar or better performance than commercial spectrum selective switch filters. Induced OSNR penalty per node due to filtering can be reduced with the adoption of these filters, thus increasing the maximum number of nodes that can be traversed before signal is corrupted. Filters programmability in terms of bandwidth is also investigated.
{"title":"Applications of advanced microring filters for switching in next generation elastic optical networks","authors":"F. Fresi, N. Sambo, C. Porzi, G. Meloni, A. Bogoni, L. Potí","doi":"10.1109/ONDM.2015.7127288","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127288","url":null,"abstract":"We investigate the use of high-order sum-difference all-pass microring filters for switching applications in circuit-switched elastic optical networks. A practical design taking into account optical losses accordingly to typical reported values for strip-waveguides in silicon-on-insulator technology is considered. Simulations performed on 30 Gbaud Nyquist PM-QPSK signals show that the proposed structure can achieve similar or better performance than commercial spectrum selective switch filters. Induced OSNR penalty per node due to filtering can be reduced with the adoption of these filters, thus increasing the maximum number of nodes that can be traversed before signal is corrupted. Filters programmability in terms of bandwidth is also investigated.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130179044","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127283
B. Uscumlic, Y. Pointurier, A. Gravey, P. Gravey, M. Morvan
We propose a new receiver architecture for coherent detection in slotted optical packet switching rings with elastic (rate adaptive) optical transponders. Such rings are a candidate solution for future datacenter and metropolitan networks. The new receiver can detect more than a single packet per time slot and consequently has higher flexibility (translating into higher supported capacity, or, equivalently, lower end-to-end latency, or a combination or both), at the cost of a moderate increase in the transponder complexity and energy consumption (less than 10%). We apply network planning and traffic engineering simulation tools (which we validate on small examples using theoretical models) to quantify the increase in network capacity and latency reduction that can be achieved thanks to the use of the new receivers.
{"title":"Optical receivers with multiple front-ends for low latency optical slot switching rings","authors":"B. Uscumlic, Y. Pointurier, A. Gravey, P. Gravey, M. Morvan","doi":"10.1109/ONDM.2015.7127283","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127283","url":null,"abstract":"We propose a new receiver architecture for coherent detection in slotted optical packet switching rings with elastic (rate adaptive) optical transponders. Such rings are a candidate solution for future datacenter and metropolitan networks. The new receiver can detect more than a single packet per time slot and consequently has higher flexibility (translating into higher supported capacity, or, equivalently, lower end-to-end latency, or a combination or both), at the cost of a moderate increase in the transponder complexity and energy consumption (less than 10%). We apply network planning and traffic engineering simulation tools (which we validate on small examples using theoretical models) to quantify the increase in network capacity and latency reduction that can be achieved thanks to the use of the new receivers.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128976111","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127275
M. Secondini, S. Rommel, F. Fresi, E. Forestieri, G. Meloni, L. Potí
Enhanced-SSFM digital backpropagation (DBP) is experimentally demonstrated and compared to conventional DBP. A 112 Gb/s PM-QPSK signal is transmitted over a 3200km dispersion-unmanaged link. The intradyne coherent receiver includes single-step digital backpropagation based on the enhanced- SSFM algorithm. In comparison, conventional DBP requires twenty steps to achieve the same performance. An analysis of the computational complexity and structure of the two algorithms reveals that the overall complexity and power consumption of DBP are reduced by a factor of 16 with respect to a conventional implementation, while the computation time is reduced by a factor of 20. As a result, the proposed algorithm enables a practical and effective implementation of DBP in real-time optical receivers, with only a moderate increase of the computational complexity, power consumption, and latency with respect to a simple feed-forward equalizer for dispersion compensation.
{"title":"Coherent 100G nonlinear compensation with single-step digital backpropagation","authors":"M. Secondini, S. Rommel, F. Fresi, E. Forestieri, G. Meloni, L. Potí","doi":"10.1109/ONDM.2015.7127275","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127275","url":null,"abstract":"Enhanced-SSFM digital backpropagation (DBP) is experimentally demonstrated and compared to conventional DBP. A 112 Gb/s PM-QPSK signal is transmitted over a 3200km dispersion-unmanaged link. The intradyne coherent receiver includes single-step digital backpropagation based on the enhanced- SSFM algorithm. In comparison, conventional DBP requires twenty steps to achieve the same performance. An analysis of the computational complexity and structure of the two algorithms reveals that the overall complexity and power consumption of DBP are reduced by a factor of 16 with respect to a conventional implementation, while the computation time is reduced by a factor of 20. As a result, the proposed algorithm enables a practical and effective implementation of DBP in real-time optical receivers, with only a moderate increase of the computational complexity, power consumption, and latency with respect to a simple feed-forward equalizer for dispersion compensation.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121985538","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 : 2015-05-11DOI: 10.1109/ONDM.2015.7127289
V. Vercesi, M. Scaffardi, A. Bogoni
We experimentally demonstrate hitless multiwavelength source reconfiguration for flexible optical networks. The source is a PPLN-based tunable frequency comb generator that provides equally spaced subcarriers with reconfigurable spacing. The subcarriers are filtered, DPSK modulated at 10 Gb/s, demodulated and received. A static and dynamic characterization is carried out. In the static characterization all the modulated subcarriers show error-free performance for 12.5, 25, 37.5 GHz spacing. In the dynamic characterization the BER is measured while the subcarrier spacing is changed from 37.5 to 12.5 GHz at different frequency steps. The automatic reconfiguration of the multiwavelength source, the filter and the demodulator is achieved with a Matlab script running on a personal computer connected with the devices. Error-free transmission is demonstrated during the reconfiguration interval for 0.5 GHz frequency step. The maximum allowed step is 1.25 GHz, at which the FEC limit is reached.
{"title":"Hitless multiwavelength source reconfiguration for flexible optical networks","authors":"V. Vercesi, M. Scaffardi, A. Bogoni","doi":"10.1109/ONDM.2015.7127289","DOIUrl":"https://doi.org/10.1109/ONDM.2015.7127289","url":null,"abstract":"We experimentally demonstrate hitless multiwavelength source reconfiguration for flexible optical networks. The source is a PPLN-based tunable frequency comb generator that provides equally spaced subcarriers with reconfigurable spacing. The subcarriers are filtered, DPSK modulated at 10 Gb/s, demodulated and received. A static and dynamic characterization is carried out. In the static characterization all the modulated subcarriers show error-free performance for 12.5, 25, 37.5 GHz spacing. In the dynamic characterization the BER is measured while the subcarrier spacing is changed from 37.5 to 12.5 GHz at different frequency steps. The automatic reconfiguration of the multiwavelength source, the filter and the demodulator is achieved with a Matlab script running on a personal computer connected with the devices. Error-free transmission is demonstrated during the reconfiguration interval for 0.5 GHz frequency step. The maximum allowed step is 1.25 GHz, at which the FEC limit is reached.","PeriodicalId":282743,"journal":{"name":"2015 International Conference on Optical Network Design and Modeling (ONDM)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121708083","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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