Minimizing the number of optical amplifiers needed to support a multi-wavelength optical LAN/MAN
Minimizing the number of optical amplifiers needed to support a multi-wavelength optical LAN/MAN
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DOI：
10.1109/infcom.1997.635138
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发表时间：
1997-04
期刊：
影响因子：
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通讯作者：
B. Ramamurthy;Jason Iness;B. Mukherjee
中科院分区：
文献类型：
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作者：
B. Ramamurthy;Jason Iness;B. Mukherjee
基于无源星星耦合器并采用波分复用（WDM）的光网络已经被提出用于在本地和大城市区域中部署。在这样的网络中需要放大器来补偿由于分裂和衰减引起的功率损耗。然而，光放大器的最大增益和最大输出功率的限制，它可以提供，因此光放大器的布局成为一个具有挑战性的问题。在器件约束条件下，最小化总放大器数量的一般问题是一个混合整数非线性问题。以前的研究已经通过添加“人为”约束来攻击增透器放置问题，即存在于光纤中的特定点处的所有波长都处于相同的功率水平。在本文中，我们提出了一种方法来解决最小放大器的位置问题，同时避免了等功率波长的约束。我们证明，通过允许信号工作在不同的功率水平，我们的方法可以减少在几个小型到中型网络所需的放大器的数量。
Optical networks based on passive star couplers and employing wavelength-division multiplexing (WDM) have been proposed for deployment in local and metropolitan areas. Amplifiers are required in such networks to compensate for the power losses due to splitting and attenuation. However, an optical amplifier has constraints on the maximum gain and the maximum output power it can supply; thus optical amplifier placement becomes a challenging problem. The general problem of minimizing the total amplifier count, subject to the device constraints, is a mixed-integer nonlinear problem. Previous studies have attacked the amplifier-placement problem by adding the "artificial" constraint that all wavelengths, which are present at a particular point in a fiber, be at the same power level. In this paper, we present a method to solve the minimum-amplifier-placement problem while avoiding the equally-powered-wavelength constraint. We demonstrate-that, by allowing signals to operate at different power levels, our method can reduce the number of amplifiers required in several small to medium-sized networks.