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This paper proposes a new distributed wavelength-routed optical burst switching (WR-OBS) network architecture and two corresponding control protocols. By taking advantage of merits from both just. enough time (JET) protocol and two-way signaling method, this new control architecture outperforms traditional JET OBS network in points of burst loss probability, system throughput and centralized WR-OBS network in network scalability confirmed by computer simulations. Further simulation is developed to compare the performance of the two control protocols, which leads to instructive discussion in real WR-OBS network design. 相似文献
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多脉冲位置调制联合正交相移键控(MPPM QPSK)在接收机灵敏度方面具有明显优势,均衡算法可以有效优化数字相干光通信系统中信号带宽受限和码间串扰带来的影响,提高信号的传输质量.针对恒模算法仅能优化MPPM-QPSK中QPSK部分的问题,对两模均衡算法的内圈参考模值进行改进,提出了一种内圈模值不为0的两模均衡算法.将该算法应用到10 Gbit/s单载波高斯成形和Nyquist成形的MPPM-QPSK相干光通信系统中,并对其内圈模值、抽头数和步长等参数进行优化.实验结果表明,相比使用传统两模算法的系统,本系统的接收机灵敏度优化了约0.1dB.当脉冲数m=2,4,8,16时,相比不加均衡算法的系统,本系统的接收机灵敏度分别优化了0.9 dB,0.6 dB,0.5 dB,0.4 dB. 相似文献
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New nonlinear dynamics in a semiconductor laser with optical self—feedback 总被引:1,自引:0,他引:1 下载免费PDF全文
We demonstrate a new kind of instability of the external cavity semiconductor laser,In some parameter regimes,the external cavity system will produce short and strong optical pulses in aperiodic intervals.This instability also shows low-frequency characteristics. 相似文献