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2013 15th International Conference on Transparent Optical Networks (ICTON)最新文献

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Erbium doped highly birefringent microstructure fiber 掺铒高双折射微结构光纤
Pub Date : 2013-09-19 DOI: 10.1109/ICTON.2013.6602889
L. Sójka, L. Pajewski, P. Mergo, D. Furniss, A. Seddon, T. Benson, S. Sujecki, E. Beres-Pawlik
In this article a novel highly-birefringent erbium-doped microstructured optical fiber is presented. The modal properties of the structure are analyzed numerically using a fully vectorial finite difference method. The emission properties of the structure have also been investigated. The emission at 1550 nm has been measured. The realised fiber can find potential applications in metrology or telecommunication optical systems.
本文提出了一种新型高双折射掺铒微结构光纤。采用全矢量有限差分法对结构的模态特性进行了数值分析。研究了该结构的发射特性。测量了1550 nm处的辐射。实现的光纤可以在计量或通信光学系统中找到潜在的应用。
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引用次数: 0
Why optical nonlinear characterization using imaging technique is a better choice? 为什么光学非线性表征使用成像技术是更好的选择?
Pub Date : 2013-09-19 DOI: 10.1109/ICTON.2013.6602866
G. Boudebs, V. Besse, C. Cassagne, H. Leblond, F. Sanchez
We show that the direct measurement of the beam radius in Z-scan experiments using a CCD camera at the output of a 4f-imaging system allows a higher sensitivity and a better accuracy than Baryscan. One of the advantages is to be insensitive to pointing instability of the pulsed laser because no hard aperture is employed as in the usual Z-scan. In addition, the numerical calculations involved here and the measurement of the beam radius are simplified since we do not measure the transmittance through an aperture and it is not subject to mathematical artifacts related to a normalization process, especially when the diffracted light is very low.
我们表明,在z扫描实验中,使用CCD相机在4f成像系统的输出处直接测量光束半径,比Baryscan具有更高的灵敏度和更好的精度。其优点之一是对脉冲激光的指向不稳定性不敏感,因为不像通常的z扫描那样使用硬孔径。此外,这里涉及的数值计算和光束半径的测量被简化了,因为我们不测量通过孔径的透射率,并且它不受与归一化过程相关的数学伪影的影响,特别是当衍射光非常低的时候。
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引用次数: 2
Dynamics of SHB and SDP on 9XX EDFAs: Dependence on spectral allocation of input channels 9XX edfa上SHB和SDP的动态:对输入信道频谱分配的依赖
Pub Date : 2013-06-23 DOI: 10.1109/ICTON.2013.6603031
J. Ferreira, D. Fonseca, P. Monteiro, A. Pinto, L. Rapp
The influence of the spectral allocation of input channels on the dynamic response of three-level erbium-doped fiber amplifiers (EDFAs) governed by spectral hold burning (SHB) and site dependent pumping (SDP) is investigated, both, experimentally and theoretically. Using an experimental setup specifically designed to isolate and assess the SHB and SDP behavior we are able to validate, with a good accuracy, a mathematical model derived from the fundamental equations of the three-level amplifier. We conclude that by selecting a pump wavelength centered at 974 nm instead of 980 nm, we can reduce the power excursions by 23 %, and that by increasing the channel spacing from 100 GHz to 150 GHz the power excursions decrease by more than 20 %. Further simulations are done to investigate the behavior of SHB and SDP in an EDFA with ideal gain control. We verify that in a subband switch, changing from the red subband to the blue subband causes higher deviations than when changing from the blue subband to the red subband of the c-band. Also, in a drop scenario, the overshoots and undershoots of the surviving channel depend on the input channels spectral allocation and on the gain of the amplifier.
从实验和理论两方面研究了三能级掺铒光纤放大器(EDFAs)在光谱保持燃烧(SHB)和位点依赖泵浦(SDP)控制下的频谱分配对其动态响应的影响。使用专门设计的实验装置来隔离和评估SHB和SDP行为,我们能够以良好的精度验证从三电平放大器的基本方程推导出的数学模型。我们得出结论,选择以974 nm为中心的泵浦波长而不是以980 nm为中心的泵浦波长,可以使功率漂移减少23%,并且通过将通道间距从100 GHz增加到150 GHz,功率漂移减少20%以上。进一步的仿真研究了具有理想增益控制的EDFA中SHB和SDP的行为。我们验证了在子带切换中,从红色子带到蓝色子带的变化比从c波段的蓝色子带到红色子带的变化引起更高的偏差。此外,在下降的情况下,幸存信道的过调和过调取决于输入信道的频谱分配和放大器的增益。
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引用次数: 0
Energy-efficient high-speed InP-based 1.3 µm short-cavity VCSELs 高效、高速、基于inp的1.3µm短腔VCSELs
Pub Date : 2013-06-23 DOI: 10.1109/ICTON.2013.6602683
S. Spiga, M. Muller, M. Amann
In this paper, the enhanced high-speed performance and energy-efficiency of 1.3 μm Short-Cavity VCSEL with buried-tunnel-junction is reported. Error-free data-transmission at 30 Gb/s up to 10 km and at 25 Gb/s up to 25 km is performed at room temperature over single mode fiber. Furthermore, low energy-to-data-distance ratios of 24 fJ/(bit·km) are achieved.
本文报道了1.3 μm具有埋隧道结的短腔VCSEL的高速性能和能效的提高。在室温下,通过单模光纤以30gb /s和25gb /s的速度传输数据,传输距离可达10公里。此外,还实现了24 fJ/(bit·km)的低能量-数据距离比。
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引用次数: 10
Improving high fidelity multimedia distribution in next-generation optical networks 改进下一代光网络中的高保真多媒体分布
Pub Date : 2013-06-23 DOI: 10.1109/ICTON.2013.6602728
M. Ruffini, Emanuele Di Pascale, D. Payne
The increasing success of Video on Demand and IPTV services poses several challenges to both network operators and service providers. Due to their heavy bandwidth requirement and the high concentration of requests during peak times, implementing these services efficiently without compromising the Quality of Experience of customers is not a trivial task. While Fibre to the premises promise to deliver enough bandwidth to enable next generation high fidelity video on demand, the bandwidth bottleneck will move towards the network core, as the capacity gap between the access and core segments of the network is eroded.
视频点播和IPTV业务的日益成功给网络运营商和服务提供商带来了一些挑战。由于它们的高带宽需求和高峰时段请求的高度集中,在不影响客户体验质量的情况下有效地实现这些服务并不是一项微不足道的任务。虽然光纤到户承诺提供足够的带宽来实现下一代高保真视频点播,但带宽瓶颈将向网络核心移动,因为网络接入网段和核心网段之间的容量差距正在缩小。
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引用次数: 4
User migration in Time and Wavelength Division Multiplexed PON (TWDM-PON) 时分波分复用PON (TWDM-PON)中的用户迁移
Pub Date : 2013-06-23 DOI: 10.1109/ICTON.2013.6602949
Hongyang Yang, Weiqiang Sun, Jun Li, Weisheng Hu
Power consumption in our communication networks is increasing rapidly, making energy efficiency one of the key considerations in developing next generation passive optical networks state 2 (NG-PON2). Considering the fact that wavelength utilization is quite low for most of the time due to the bursty nature of the traffic and the fluctuation of the bandwidth demand, we propose a novel user migration mechanism for the Time and Wavelength Division Multiplexed PON (TWDM-PON). With the proposed migration mechanism, one can minimize the active wavelength up to theoretical lower bound under typical ONU online profiles. We investigate how the user Service Level Agreement (SLA) is affected by the migration interval and migration delay. Our results show that 99.999% SLA can be guaranteed when the migration delay is less than 10 milliseconds.
通信网络的功耗正在迅速增加,使得能源效率成为开发下一代无源光网络状态2 (NG-PON2)的关键考虑因素之一。考虑到由于业务量的突发特性和带宽需求的波动,在大多数情况下波长利用率很低,提出了一种新的时波分复用PON (TWDM-PON)用户迁移机制。根据所提出的迁移机制,在典型的ONU在线剖面下,可以将有效波长最小化到理论下界。我们研究了用户服务水平协议(SLA)如何受到迁移间隔和迁移延迟的影响。我们的结果表明,当迁移延迟小于10毫秒时,可以保证99.999%的SLA。
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引用次数: 4
Dispersion constraints in optical burst switched metropolitan networks with WDM/OCDM technology 基于WDM/OCDM技术的光突发交换城域网中的色散约束
Pub Date : 2013-06-23 DOI: 10.1109/ICTON.2013.6602913
L. H. Bonani, Alex Bernaz dos Santos, L. Galdino
In this work we study the influence of Chromatic Dispersion (CD) and Polarization Mode Dispersion (PMD) in the performance of Optical Burst Switched (OBS) Metropolitan networks using the hybrid WDM/OCDM (Wavelength Division Multiplexing/Optical Code Division Multiplexing) technology with Optical Orthogonal Codes (OOC). The analysis is carried on the context of a metropolitan network, since its resources are limited and the WDM/OCDM technology is becoming an interesting way to improve the utilization of wavelengths. However, the pulse broadening is also increased when using WDM/OCDM technology, since the chip rates are higher than the bit user rates due to the process of code construction, and the dispersion mechanisms must be taken into account even when modeling metropolitan optical networks, in which the route distances are much smaller than that in a core optical network.
在这项工作中,我们研究了色散(CD)和偏振模色散(PMD)对使用WDM/OCDM(波分复用/光码分复用)和光正交码(OOC)混合技术的光突发交换(OBS)城域网性能的影响。本文在城域网的背景下进行了分析,由于城域网的资源有限,WDM/OCDM技术正在成为提高波长利用率的一种有趣的方法。然而,使用WDM/OCDM技术时,由于编码构建过程导致芯片速率高于比特用户速率,因此脉冲展宽也会增加,并且即使在建模路由距离远小于核心光网络的城域光网络时也必须考虑色散机制。
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引用次数: 0
Flow controlled scalable optical packet switch for low latency flat data center network 用于低延迟扁平数据中心网络的流量控制可扩展光分组交换机
Pub Date : 2013-06-23 DOI: 10.1109/ICTON.2013.6602859
N. Calabretta, S. di lucente, Jun Luo, A. Rohit, K. Williams, H. Dorren
Bandwidth-hungry internet services like cloud computing, social networking and video sharing generate large volumes of packetized traffic within data centers (DCs). Inter-cluster communication bottleneck of current DCs tree topology causes fragmented pools of servers and high latency by employing a large port count (100s) optical packet switch (OPS) to flatten the DC network topology. However, the reconfiguration time of several OPS architectures with centralized control is port count dependent. Scaling the port count causes larger latency, and thus larger buffers for storing the packets in a flow controlled operation. We present numerical and experimental results that validate the operation of a flow-controlled optical packet switch cross-connect with distributed control and nanosecond packet switching/retransmission. Real-time operation of a random packet traffic generator with variable load, FIFO queue packet storing with buffer managers for packet retransmission, contention resolution and fast switch reconfiguration control have been implemented by using an FPGA.
云计算、社交网络和视频共享等需要大量带宽的互联网服务在数据中心(dc)内产生了大量的分组流量。当前数据中心树型拓扑的集群间通信瓶颈导致服务器池碎片化、时延高,采用大端口(100个)的OPS (optical packet switch)将数据中心网络拓扑扁平化。然而,几种集中控制的OPS体系结构的重构时间依赖于端口数。扩展端口数量会导致更大的延迟,因此在流控制操作中存储数据包的缓冲区也会更大。我们给出了数值和实验结果,验证了流控光分组交换机与分布式控制和纳秒分组交换/重传交叉连接的操作。利用FPGA实现了可变负载随机分组流量发生器的实时操作、缓存管理器的FIFO队列分组存储、分组重传、争用解决和快速交换机重配置控制。
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引用次数: 2
The impact of content popularity distribution on energy efficient caching 内容流行度分布对节能缓存的影响
Pub Date : 2013-06-23 DOI: 10.1109/ICTON.2013.6602957
N. Osman, T. El-Gorashi, J. Elmirghani
This paper evaluates the effect of content popularity distribution on the power consumption of cache-based services in an IP over WDM network. We consider the Zipf, Bimodal, Pareto and Equal Popularity distributions for content popularity. The results reveal that using our MILP model, reductions in power consumption under the Zipf, Pareto, Bimodal and Equal Popularity distributions are up to 47%, 71%, 72% and 71%, respectively. We also study the impact of the sizes of media files and the impact of the power efficiency of caches on the network power consumption. The results confirm that under the Zipf and Equal Popularity distributions the power consumption rises as the average size of media files and cache power consumption increases. Under the Bimodal and Pareto distributions, the average cache size in the network is not affected by the increase in media file sizes.
本文评估了内容流行度分布对IP over WDM网络中基于缓存的服务功耗的影响。我们考虑Zipf、Bimodal、Pareto和Equal Popularity分布来表示内容的受欢迎程度。结果显示,使用我们的MILP模型,Zipf、Pareto、Bimodal和Equal Popularity分布下的功耗降低分别高达47%、71%、72%和71%。我们还研究了媒体文件大小的影响以及缓存的功率效率对网络功耗的影响。结果证实,在Zipf和Equal Popularity分布下,功耗随着媒体文件的平均大小和缓存功耗的增加而增加。在双峰分布和帕累托分布下,网络中的平均缓存大小不受媒体文件大小增加的影响。
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引用次数: 19
High resolution optical spectral filtering technology: Reaching the sub-GHz resolution range 高分辨率光谱滤波技术:达到ghz以下分辨率范围
Pub Date : 2013-06-23 DOI: 10.1109/icton.2013.6603007
D. Marom, D. Sinefeld, O. Golani, N. Goldshtein, R. Zektzer, R. Rudnick
Fine optical filtering is instrumental in fully utilizing the optical gain bandwidth with communication signals. We present the design of a hybrid guided-wave / free-space filtering apparatus based on high resolution Arrayed Waveguide Gratings (AWG). These hybrid systems, called photonic spectral processors (PSP), can access and manipulate the fine spectral components of a lightwave signal with a spatial light modulator. In order to achieve sub-GHz resolution of the PSP, an AWG with large number of waveguides and long incremental waveguide lengths is needed. Such an AWG require careful design in order to enable relatively compact realization with a dense waveguide count, and an additional step of phase error correction which are inevitable in such design. In this paper we review the design consideration of a high resolution AWG with 200 GHz FSR and sub-GHZ spectral resolution and describe the phase errors interferometric measurement system and the UV trimming system which is needed as an essential post production process.
精细的光滤波有助于充分利用通信信号的光增益带宽。本文设计了一种基于高分辨率阵列波导光栅(AWG)的导波/自由空间混合滤波装置。这些混合系统被称为光子光谱处理器(PSP),可以通过空间光调制器访问和操纵光波信号的精细光谱成分。为了实现PSP的sub-GHz分辨率,需要一个具有大量波导和长增量波导长度的AWG。这样的AWG需要精心设计,以实现相对紧凑的实现和密集的波导计数,以及在这种设计中不可避免的相位误差校正的额外步骤。本文综述了200 GHz FSR和sub-GHZ频谱分辨率的高分辨率AWG的设计思路,并介绍了相位误差干涉测量系统和后期制作过程中必不可少的紫外切边系统。
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引用次数: 0
期刊
2013 15th International Conference on Transparent Optical Networks (ICTON)
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