The A'Prune quality of service (QoS) routing algorithm was proposed to compute K-shortest paths satisfying multiple QoS constraints, The A'Prune is considered to be one of the practical routing algorithms for inte...The A'Prune quality of service (QoS) routing algorithm was proposed to compute K-shortest paths satisfying multiple QoS constraints, The A'Prune is considered to be one of the practical routing algorithms for intelligent optical networks because of its flexibility in handling many practical constraints, This article gives detailed performance studies of the algorithm through extensive simulation experiments. We found that both the running time and the memory space requirements of the algorithm are large, especially when the network size increases, in this article, we also propose an approach to improving the performance of the A'Prune algorithm. The improvements should make the A'Prune algorithm more attractive for practical use in intelligent optical networks.展开更多
Orbital angular momentum(OAM) has gained interest due to its potential to increase capacity in optical communication systems as well as an additional domain for reconfigurable networks. This is due to the following:(i...Orbital angular momentum(OAM) has gained interest due to its potential to increase capacity in optical communication systems as well as an additional domain for reconfigurable networks. This is due to the following:(i) coaxially propagated OAM beams with different charges are mutually orthogonal,(ii) OAM beams can be efficiently multiplexed and demultiplexed, and(iii) OAM charges can be efficiently manipulated. Therefore, multiple data-carrying OAM beams could have the potential capability for reconfigurable optical switching and routing. In this paper, we discuss work involving reconfigurable OAM-based optical add/drop multiplexing, space switching,polarization switching, channel hopping, and multicasting.展开更多
We demonstrate the routing operation of optical packets by an optical packet switch consisting of an optical digital-to-analog conversion-type header processor, a wavelength converter using an electrically-tunable las...We demonstrate the routing operation of optical packets by an optical packet switch consisting of an optical digital-to-analog conversion-type header processor, a wavelength converter using an electrically-tunable laser, and an arrayed-waveguide grating router. A packet transfer by two-bit optical header was achieved for the first time.展开更多
A WDM compatible Edge-to-Edge Self-Routed optical packet switched network that simplifies the optical processing is proposed. The system employs all-optical packet label generation and recognition using coded superstr...A WDM compatible Edge-to-Edge Self-Routed optical packet switched network that simplifies the optical processing is proposed. The system employs all-optical packet label generation and recognition using coded superstructured Fiber Bragg gratings.展开更多
This article puts forward a novel routing architecture for complex optical network,which core component is path calculation element (PCE).As is well known,the PCE-based distributed path computation structure is maki...This article puts forward a novel routing architecture for complex optical network,which core component is path calculation element (PCE).As is well known,the PCE-based distributed path computation structure is making the routing control and computation loosely coupled from traditional control plane.In the study,the resource allocation and routing algorithm are the critical part of PCE hierarchy.To compare the performance of new architecture and the traditional one,the user uses the flooding suppression,routing delay,resource utilization and traffic blocking probability as performance simulation parameters and taking the verification simulation on objective modular network testbed (OMNeT) platform against to source-node routing architecture.The numerical analysis,computer simulation and experiment work indicate that the operation of PCE-based routing architecture can reduce the flooding information of path calculation request as well as the routing hops significantly and improve the quality of service (QoS) by decreasing the blocking probability when failure happened.展开更多
We demonstrate a polarization-insensitive silicon 4×4 optical switch based on Mach–Zehnder interferometer(MZI)switch elements.On-chip polarization controllers are integrated before the switch fabric to automatic...We demonstrate a polarization-insensitive silicon 4×4 optical switch based on Mach–Zehnder interferometer(MZI)switch elements.On-chip polarization controllers are integrated before the switch fabric to automatically adjust an arbitrary input polarization to the transverse electric mode.The 4×4 switch fabric is based on a dilated double-layer network architecture to completely cancel the first-order crosstalk.Thermo-optic phase shifters are integrated in the MZI switch elements and the polarization controllers for adjustment of the switching state and polarization,respectively.We develop a polarization control algorithm based on a gradient descent method for automated polarization control.The polarization recovery time is less than 4 ms,and the measured polarization-dependent loss is~2 d B.The scheme provides a new solution for realizing polarization-insensitive silicon optical switches.展开更多
文摘The A'Prune quality of service (QoS) routing algorithm was proposed to compute K-shortest paths satisfying multiple QoS constraints, The A'Prune is considered to be one of the practical routing algorithms for intelligent optical networks because of its flexibility in handling many practical constraints, This article gives detailed performance studies of the algorithm through extensive simulation experiments. We found that both the running time and the memory space requirements of the algorithm are large, especially when the network size increases, in this article, we also propose an approach to improving the performance of the A'Prune algorithm. The improvements should make the A'Prune algorithm more attractive for practical use in intelligent optical networks.
基金Air Force Office of Scientific Research(AFOSR)FA9550-15-C-0024Defense Advanced Research Projects Agency(DARPA)+2 种基金National Science Foundation(NSF)ECCS-1509965)Nx Gen PartnersOffice of Naval Research(ONR)416678-G
文摘Orbital angular momentum(OAM) has gained interest due to its potential to increase capacity in optical communication systems as well as an additional domain for reconfigurable networks. This is due to the following:(i) coaxially propagated OAM beams with different charges are mutually orthogonal,(ii) OAM beams can be efficiently multiplexed and demultiplexed, and(iii) OAM charges can be efficiently manipulated. Therefore, multiple data-carrying OAM beams could have the potential capability for reconfigurable optical switching and routing. In this paper, we discuss work involving reconfigurable OAM-based optical add/drop multiplexing, space switching,polarization switching, channel hopping, and multicasting.
文摘We demonstrate the routing operation of optical packets by an optical packet switch consisting of an optical digital-to-analog conversion-type header processor, a wavelength converter using an electrically-tunable laser, and an arrayed-waveguide grating router. A packet transfer by two-bit optical header was achieved for the first time.
文摘A WDM compatible Edge-to-Edge Self-Routed optical packet switched network that simplifies the optical processing is proposed. The system employs all-optical packet label generation and recognition using coded superstructured Fiber Bragg gratings.
基金supported by the National Basic Research Program of China (2010CB328204)the Hi-Tech Research and Development Program of China (2009AA01Z255)+3 种基金the National Natural Science Foundation of China (60772022)PCSIRT program (IRT0609)111 Project (B07005) of ChinaBUPT Excellent Ph. D Students Foundation
文摘This article puts forward a novel routing architecture for complex optical network,which core component is path calculation element (PCE).As is well known,the PCE-based distributed path computation structure is making the routing control and computation loosely coupled from traditional control plane.In the study,the resource allocation and routing algorithm are the critical part of PCE hierarchy.To compare the performance of new architecture and the traditional one,the user uses the flooding suppression,routing delay,resource utilization and traffic blocking probability as performance simulation parameters and taking the verification simulation on objective modular network testbed (OMNeT) platform against to source-node routing architecture.The numerical analysis,computer simulation and experiment work indicate that the operation of PCE-based routing architecture can reduce the flooding information of path calculation request as well as the routing hops significantly and improve the quality of service (QoS) by decreasing the blocking probability when failure happened.
基金supported in part by the National Key Research and Development Program(Nos.2019YFB2203200,2019YFB1802903,and 2018YFB2201702)the National Natural Science Foundation of China(NSFC)(Nos.6207030193 and 62090052)+1 种基金the Shanghai Municipal Science and Technology Major Project(No.2017SHZDZX03)the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2019WNLOKF004)。
文摘We demonstrate a polarization-insensitive silicon 4×4 optical switch based on Mach–Zehnder interferometer(MZI)switch elements.On-chip polarization controllers are integrated before the switch fabric to automatically adjust an arbitrary input polarization to the transverse electric mode.The 4×4 switch fabric is based on a dilated double-layer network architecture to completely cancel the first-order crosstalk.Thermo-optic phase shifters are integrated in the MZI switch elements and the polarization controllers for adjustment of the switching state and polarization,respectively.We develop a polarization control algorithm based on a gradient descent method for automated polarization control.The polarization recovery time is less than 4 ms,and the measured polarization-dependent loss is~2 d B.The scheme provides a new solution for realizing polarization-insensitive silicon optical switches.