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首页> 外文会议>Conference on Optical Transmission, Switching, and Subsystems >Optimization algorithm in adaptive PMD compensation in 10Gb/s optical communication system
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Optimization algorithm in adaptive PMD compensation in 10Gb/s optical communication system

机译：10GB / S光通信系统自适应PMD补偿中的优化算法

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In this paper, the optimization algorithms are introduced in adaptive PMD compensation in 10Gb/s optical communication system. The PMD monitoring technique based on degree of polarization (DOP) is adopted. DOP can be a good indicator of PMD with monotonically deceasing of DOP as differential group delay (DGD) increasing. In order to use DOP as PMD monitoring feedback signal, it is required to emulate the state of DGD in the transmission circuitry. A PMD emulator is designed. A polarization controller (PC) is used in fiber multiplexer to adjust the polarization state of optical signal, and at the output of the fiber multiplexer a polarizer is used. After the feedback signal reach the control computer, the optimization program run to search the global optimization spot and through the PC to control the PMD. Several popular modern nonlinear optimization algorithms (Tabu Search, Simulated Annealing, Genetic Algorithm, Artificial Neural Networks, Ant Colony Optimization etc.) are discussed and the comparisons among them are made to choose the best optimization algorithm. Every algorithm has its advantage and disadvantage, but in this circs the Genetic Algorithm (GA) may be the best. It eliminates the worsen spots constantly and lets them have no chance to enter the circulation. So it has the quicker convergence velocity and less time. The PMD can be compensated in very few steps by using this algorithm. As a result, the maximum compensation ability of the one-stage PMD and two-stage PMD can be made in very short time, and the dynamic compensation time is no more than 10ms.
机译：在本文中，在10GB / S光通信系统中的自适应PMD补偿中引入了优化算法。采用基于极化程度（DOP）的PMD监测技术。 DOP可以是PMD的良好指标，随着差分组延迟（DGD）增加，单调地死于DOP。为了使用DOP作为PMD监控反馈信号，需要在传输电路中模拟DGD的状态。设计了PMD仿真器。偏振控制器（PC）用于光纤多路复用器以调节光信号的偏振状态，并且在使用光纤多路复用器的输出时使用偏振器。在反馈信号到达控制计算机后，优化程序运行以搜索全局优化点并通过PC控制PMD。讨论了几种流行的现代非线性优化算法（禁忌搜索，模拟退火，遗传算法，人工神经网络，蚁群优化等），并进行了最佳优化算法的比较。每种算法都有其优势和缺点，但在该条件中，遗传算法（GA）可能是最好的。它不断消除恶化的斑点，让他们没有机会进入流通。所以它具有更快的收敛速度和更少的时间。通过使用该算法，可以在很少几个步骤中补偿PMD。结果，可以在非常短的时间内进行单级PMD和两级PMD的最大补偿能力，动态补偿时间不超过10ms。

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