一种具有自调整功能的多信道EDFA放大模块

A Self Adjusting Amplifier Module for WDM Networks

为克服常规ＥＤＦＡ在波分复用系统中由于增益不平衡造成各信道功率弥散的困难，本文提出了一种具有自调整功能的多信道ＥＤＦＡ放大模块。该放大模块在一对波分复用器之间平行地放置一套共享泵浦源的掺饵光纤放大器。其主要优点是在波分复用系统应用时，各波长信道之间的功率弥散不会随着放大模块的级联而积累。相反，该模块可以自动抑制由于波分复用网络中器件和线路的不同损耗造成的接收功率的起伏。系统容量可以简单地通过分组密集波分复用的方式实现。由于采用了泵浦共享，系统的费用不会很大增加。文中利用计算机实验模拟，证明了该模块的良好性能。

A simple self adjusting WDM amplifier module consisting of a set of Er doped fibers (EDF) and a shared pump is proposed.The chief benefit of the module is that inter channel power spread doesn't accumulate from stage to stage in a cascaded WDM system,as do chains of conventional fiber amplifier.Moreover,they can automatically compress the power differences caused by different component loss existing in the WDM networks.The network capacity can be simply upgraded by means of dense WDM within a narrow band which we called wavelengths group.The cost will not increase a lot since the pump source is shared in the module.The performance of a cascaded system constructed from the modules has been carefully studied by computer simulation.