增加光节点的简便方法

早期建设的有线电视光纤网，普遍存在光节点分布太稀和光纤芯数裕量太少的问题，为此，介绍两种使用超低光功率接收机增加光节点的方式和光链路设计，以及选用超低光功率接收机要考虑的因素，并将新增节点光链路延伸不同长度的分光比计算结果列成表格，以供工程中直接查用。

A Simple Method to Increase Optical Node

In the optical network that was laid down for television in the early day, there exist two common problems which are the sparseness of optical nodes and the low number of optical fibre within the cable. From this, introduces two simple practical method to use extra low optical power receivers to increase optical nodes,and factors to be considered in designing optical links and implementing extra low optical power receivers. Adding optical nodes to extend optical links by different lengths will result in different optical divide ratio. It also puts these coefficients into form to facilitate use during engineering.